Professor Rob D. Jeffries

Title: Professor of Astrophysics
Phone: +44 (0) 1782 7 33892
Email:
Location: Lennard-Jones 2.08
Role:
Contacting me: Email contact preferred, but I have an "open door" policy for students
Jeffries_Rob

I was appointed to a lectureship at Keele in 1995 and promoted to Reader in 2001. Prior to this I was a post-doctoral research assistant in X-ray astronomy at the University of Birmingham and this is also where I obtained my PhD in 1991.

I am a Science, Technology, Engineering and Mathematics (STEM) Ambassador with a remit to promote the public understanding of science and widening participation in higher education. These include school visits, tours of Keele observatory and adult and continuing education courses. See my website for details.

Jeffries Stars like the Sun or of even lower mass are born in clusters and associations. I search for young Suns, low-mass stars and brown dwarfs in star forming regions and clusters in order to find how common they are in a variety of environments and follow the temporal evolution of their discs, rotation rates, magnetic activity and chemical abundances.

The goals are to understand the way in which birth environment influences the development of low-mass stars (and their planetary systems) and to investigate the astrophysics, such as mixing, convection and magnetic fields, that are incorporated into pre main sequence evolutionary models.

See personal website for further information

Selected Publications

  • Jeffries RD, Littlefair SP, Naylor T, Mayne NJ. 2011. No wide spread of stellar ages in the Orion Nebula Cluster. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 418(3), 1948-1958. link> doi>
  • Jeffries RD. 2007. Using rotation rates to probe age spreads in the Orion Nebula Cluster. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 381(3), 1169-1178. link> doi>
  • JEFFRIES RD and Oliveira JM. 2005. The lithium depletion boundary in NGC 2547 as a test of pre-main-sequence evolutionary models. Monthly Notices of the Royal Astronomical Society, vol. 358, 13-29. doi>
  • Bell, CPM, Naylor, T, Mayne, NJ, Jeffries RD, Littlefair, SP. 2013. Pre-main-sequence isochrones – II. Revising star and planet formation time-scales. Monthly Notices of the Royal Astronomical Society, vol. 434(1), 806-831. doi>
  • Jackson RJ and Jeffries RD. 2013. On the relationship between the size and surface coverage of starspots on magnetically active low-mass stars. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 431(2), 1883-1890. link> doi>

Full Publications List show

Journal Articles

  • Bell, CPM, Naylor, T, Mayne, NJ, Jeffries RD, Littlefair, SP. 2013. Pre-main-sequence isochrones – II. Revising star and planet formation time-scales. Monthly Notices of the Royal Astronomical Society, vol. 434(1), 806-831. doi>
  • Jackson RJ and Jeffries RD. 2013. On the relationship between the size and surface coverage of starspots on magnetically active low-mass stars. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 431(2), 1883-1890. link> doi>
  • Bell CPM, Naylor T, Mayne NJ, Jeffries RD, Littlefair SP. 2012. Pre-main-sequence isochrones - I. The Pleiades benchmark. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 424(4), 3178-3191. link> doi>
  • Jackson RJ and Jeffries RD. 2012. Why do some young cool stars show spot modulation while others do not?. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 423(3), 2966-2976. link> doi>
  • Allen TS, Gutermuth RA, Kryukova E, Megeath ST, Pipher JL, Naylor T, Jeffries RD, Wolk SJ, Spitzbart B, Muzerolle J. 2012. SPITZER IMAGING OF THE NEARBY RICH YOUNG CLUSTER, Cep OB3b. ASTROPHYSICAL JOURNAL, vol. 750(2), Article ARTN 125. link> doi>
  • Smith R and Jeffries RD. 2012. Dust discs around intermediate-mass and Sun-like stars in the 16 Myr old NGC 1960 open cluster. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 420(4), 2884-2898. link> doi>
  • Jeffries RD, Littlefair SP, Naylor T, Mayne NJ. 2011. No wide spread of stellar ages in the Orion Nebula Cluster. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 418(3), 1948-1958. link> doi>
  • Littlefair SP, Naylor T, Mayne NJ, Saunders E, Jeffries RD. 2011. Accretion-induced luminosity spreads in young clusters: evidence from stellar rotation. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 413(1), L56-L60. link> doi>
  • Jeffries RD, Jackson RJ, Briggs KR, Evans PA, Pye JP. 2011. Investigating coronal saturation and supersaturation in fast-rotating M-dwarf stars. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 411(3), 2099-2112. link> doi>
  • Cargile PA, James DJ, Jeffries RD. 2010. IDENTIFICATION OF THE LITHIUM DEPLETION BOUNDARY AND AGE OF THE SOUTHERN OPEN CLUSTER BLANCO 1. ASTROPHYSICAL JOURNAL LETTERS, vol. 725(2), L111-L116. link> doi>
  • Jackson RJ and Jeffries RD. 2010. Chromospheric activity among fast-rotating M dwarfs in the open cluster NGC 2516. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 407(1), 465-478. link> doi>
  • Littlefair SP, Naylor T, Mayne NJ, Saunders ES, Jeffries RD. 2010. Rotation of young stars in Cepheus OB3b. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 403(2), 545-557. link> doi>
  • Jackson RJ and Jeffries RD. 2010. Are the spin axes of stars randomly aligned within a cluster?. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 402(2), 1380-1390. link> doi>
  • Jeffries RD, Jackson RJ, James DJ, Cargile PA. 2009. Low-mass members of the young cluster IC 4665 and pre-main-sequence lithium depletion. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 400(1), 317-329. link> doi>
  • Jackson RJ, Jeffries RD, Maxted PFL. 2009. The radii of M-dwarfs in the young open cluster NGC 2516. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 399(1), L89-L93. link> doi>
  • Jeffries RD, Naylor T, Walter FM, Pozzo MP, Devey CR. 2009. The stellar association around Gamma Velorum and its relationship with Vela OB2. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 393(2), 538-556. link> doi>
  • Oliveira JM, Jeffries RD, van Loon JT. 2009. The low-mass initial mass function in the young cluster NGC6611. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 392(3), 1034-1050. link> doi>
  • Hernandez J, Hartmann L, Calvet N, Jeffries RD, Gutermuth R, Muzerolle J, Stauffer J. 2008. A SPITZER VIEW OF PROTOPLANETARY DISKS IN THE gamma VELORUM CLUSTER. ASTROPHYSICAL JOURNAL, vol. 686(2), 1195-1208. link> doi>
  • Maxted PFL, Jeffries RD, Oliveira JM, Naylor T, Jackson RJ. 2008. A survey for low-mass spectroscopic binary stars in the young clusters around sigma Orionis and lambda Orionis. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 385(4), 2210-2224. link> doi>
  • Jeffries RD. 2007. Using rotation rates to probe age spreads in the Orion Nebula Cluster. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 381(3), 1169-1178. link> doi>
  • Jeffries RD. 2007. The distance to the Orion Nebula cluster. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 376(3), 1109-1119. link> doi>
  • Jeffries RD, Oliveira JM, Naylor T, Mayne NJ, Littlefair SP. 2007. The Keele-Exeter young cluster survey - I. Low-mass pre-main-sequence stars in NGC 2169. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 376(2), 580-598. link> doi>
  • Mayne NJ, Naylor T, Littlefair SP, Saunders ES, Jeffries RD. 2007. Empirical isochrones and relative ages for young stars, and the radiative-convective gap. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 375(4), 1220-1240. link> doi>
  • Naylor T and Jeffries RD. 2006. A maximum-likelihood method for fitting colour-magnitude diagrams. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 373(3), 1251-1263. link> doi>
  • JEFFRIES RD, Maxted P, Naylor Tim, Oliveira JM. 2006. Kinematic structure in the young σ Orionis association. Monthly Notices of the Royal Astronomical Society, vol. 371(1), L6-L10. doi>
  • Oliveira JM, Jeffries RD, van Loon JT, Rushton MT. 2006. Circumstellar discs in the young sigma Orionis cluster. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 369(1), 272-280. link> doi>
  • Jeffries RD, Evans PA, Pye JP, Briggs KR. 2006. An XMM-Newton observation of the young open cluster NGC 2547: coronal activity at 30 Myr. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 367(2), 781-800. link> doi>
  • Ford A, Jeffries RD, Smalley B. 2005. Elemental abundances in the Blanco 1 open cluster. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 364(1), 272-282. link> doi>
  • Burningham B, Naylor T, Littlefair SP, Jeffries RD. 2005. Can variability account for apparent age spreads in OB association colour-magnitude diagrams ?. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 363(4), 1389-1397. link> doi>
  • Ashwell JF, Jeffries RD, Smalley B, Deliyannis CP, Steinhauer A, King JR. 2005. Beryllium enhancement as evidence for accretion in a lithium-rich F dwarf. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 363(1), L81-L85. link> doi>
  • MAXTED PFL and Jeffries RD. 2005. On the frequency of close binary systems among very low-mass stars and brown dwarfs. Monthly Notices of the Royal Astronomical Society, vol. 362(1), L45-L49. doi>
  • Littlefair SP, Naylor T, Burningham B, Jeffries RD. 2005. Do accretion discs regulate the rotation of young stars?. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 358(2), 341-352. link> doi>
  • Oliveira JM, Jeffries RD, van Loon JT, Littlefair SP, Naylor T. 2005. Circumstellar discs around solar mass stars in NGC 6611. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 358(1), L21-L24. link> doi>
  • JEFFRIES RD and Oliveira JM. 2005. The lithium depletion boundary in NGC 2547 as a test of pre-main-sequence evolutionary models. Monthly Notices of the Royal Astronomical Society, vol. 358, 13-29. doi>
  • Burningham B, Naylor T, Littlefair P, Jeffries RD. 2005. Contamination and exclusion in the sigma Orionis young group. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 356(4), 1583-1591. link> doi>
  • JEFFRIES RD, Kenyon MJ, Naylor Tim, Oliveira JM. 2005. Membership, binarity and accretion among very low-mass stars and brown dwarfs of the σ Orionis cluster. Monthly Notices of the Royal Astronomical Society, vol. 356 Issue 1(1), 89-106. doi>
  • Oliveira JM, Jeffries RD, van Loon JT. 2004. An L '-band survey for circumstellar discs around low-mass stars in the young sigma Orionis cluster. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 347(4), 1327-1336. link> doi>
  • Wolk SJ, Harnden FR Jr, Murray SS, Adams NR, Damiani F, Flaccomio E, Micela G, Sciortino S, Jeffries RD. 2004. Coronal Variability in the Young Cluster NGC 2516. Astrophysical Journal. doi>
  • Jeffries RD, Naylor T, Devey CR, Totten EJ. 2004. Low mass stars, brown dwarf candidates and the mass function of the young open cluster NGC2547. Monthly Notices of the Royal Astronomical Society. doi>
  • Burningham B, Naylor T, Jeffries RD, Devey CR. 2003. On the nature of Collinder 121: insights from the low-mass pre-main sequence. Monthly Notices of the Royal Astronomical Society. doi>
  • Littlefair SP, Naylor T, Jeffries RD, Devey CR, Vine S. 2003. Mass segregation in the young open cluster NGC 2547. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 345(4), 1205-1211. link> doi>
  • Damiani F, Flaccomio E, Micela G, Sciortino S, Harnden FR JR, Murray SS, Wolk SJ, Jeffries RD. 2003. Chanra X-ray observations of the young open cluster NGC 2516. Astrophysical Journal. doi>
  • Jeffries RD and Elliott KH. 2003. The local stellar population. EUROPEAN JOURNAL OF PHYSICS, vol. 24(2), S17-S24. link> doi>
  • Jeffries RD, Oliveira JM, Barrado y Navascues D, Stauffer JR. 2003. Cool stars in NGC 2547 and pre-main-sequence lithium depletion. Monthly Notices of the Royal Astronomical Society. doi>
  • Pozzo M, Naylor T, Jeffries RD, Drew JE. 2003. The discovery of the low-mass pre-main sequence stars in Cepheus OB3b. Monthly Notices of the Royal Astronomical Society. doi>
  • Oliveira JM, Jeffries RD, Devey CR, Barrado y Navascues D, Naylor T, Stauffer JR, Totten EJ. 2003. The Lithium depletion boundary and the age of NGC 2547. Monthly Notices of the Royal Astronomical Society. doi>
  • Jeffries RD, Totten EJ, Harmer S, Deliyannis CP. 2002. Membership, metallicity and lithium abundances for solar-type stars in NGC6633. Monthly Notices of the Royal Astronomical Society, 1109-1128. doi>
  • Ford A, Jeffries RD, Smalley B, Ryan SG, Aoki W, Kawanomoto S, James DJ, Barnes JR. 2002. Lithium 6104 angstrom in population II stars. ASTRONOMY & ASTROPHYSICS, vol. 393(2), 617-628. link> doi>
  • Deliyannis CP, Steinhauer A, Jeffries RD. 2002. Discovery of the most lithium-rich dwarf: Diffusion in action. ASTROPHYSICAL JOURNAL, vol. 577(1), L39-L43. link> doi>
  • Terndrup DM, Pinsonneault M, Jeffries RD, Ford A, Stauffer JR, Sills A. 2002. Rotation and activity in the solar-metallicity open cluster NGC 2516. Astrophysical Journal, 950-962. doi>
  • Ford A, Jeffries RD, Smalley B. 2002. Lithium abundances from the 6104 A line in cool Pleiades stars. Astronomy and Astrophysics, 253-265. doi>
  • Webb NA, Naylor T, Jeffries RD. 2002. Spectroscopic evidence for starspots on the secondary star of SS Cygni. ASTROPHYSICAL JOURNAL, vol. 568(1), L45-L48. link> doi>
  • Oliveira JM, Jeffries RD, Kenyon MJ, Thompson SA, Naylor T. 2002. No disks around low-mass stars and brown dwarfs in the young sigma Orionis cluster?. ASTRONOMY & ASTROPHYSICS, vol. 382(3), L22-L25. link> doi>
  • Deliyannis CP, Steinhauer A, Jeffries RD. 2002. Discovery of the most lithium-rich dwarf: Diffusion in action. Astrophysical Journal, 39-43.
  • Ford A, Jeffries RD, Smalley B, Ryan SG, Aoki W, Kawanomoto S, James DJ, Barnes JR. 2002. Lithium 6104A in Population IIstars. Astronomy and Astrophysics, 617-628.
  • Oliveira JM, Jeffries RD, Kenyon MK, Thompson SA, Naylor T. 2002. No disks around low-mass stars and brown dwarfs in the young Sigma Orionis cluster?. Astronomy and Astrophysics, 22-25.
  • Naylor T, Totten EJ, Jeffries RD, Pozzo M, Devey CR, Thompson SA. 2002. Optimal photometry for colour-magnitude diagrams and its application to NGC 2547. Monthly Notices of the Royal Astronomical Society, 291-310. doi>
  • Webb NA, Naylor T, Jeffries RD. 2002. Spectroscopic evidence for starspots on the secondary star of SS Cygni. Astrophysical Journal, 45-48.
  • JEFFRIES RD, Hambly NC, Thurston MR. 2001. Photometry and membership for low mass stars in the young open cluster NGC 2516. Astronomy & Astrophysics, vol. 375, 863-889. doi>
  • Harden FR, Adams N, Damiani F, Drake J, Evans NR, Favata F, Flaccomio F, Freeman P, Jeffries RD, Kashyap V, Micela G, Patten BM, Pizzolato N, Schachter J, Sciortino S, Stauffer J, Wolk SJ, Zombeck MV. 2001. Chandra observations of the open cluster NGC2516. Astrophysical Journal.
  • Ford A, Jeffries RD, James DJ, Barnes JR. 2001. Lithium in the late type stars of the Coma Berenices Open Cluster. Astronomy and Astrophysics. doi>
  • Sciortino S, Micela G, Damiani F, Pye JP, Grosso N, Read AM, Gondoin P, Jeffries RD. 2001. An XMM-Newton Survey of the low metallicity open cluster NGC 2516. Astronomy and Astrophysics. doi>
  • James DJ, Jardine MM, Jeffries RD, Randich S, Collier-Cameron A, Ferreira M. 2001. X-ray emission from nearby M dwarfs: the supersaturation phenomenon. Monthly Notices of the Royal Astronomical Society. doi>
  • Harmer S, Jeffries RD, Totten EJ, Pye JP. 2001. X-rays from the open cluster NGC6633. Monthly Notices of the Royal Astronomical Society. doi>
  • Briggs KP, Pye JP, Jeffries RD, Totten EJ. 2001. The X-ray source populations in the regions of the open clusters NGC6633 and IC4756. Monthly Notices of the Royal Astronomical Society. doi>
  • Jeffries RD, Totten EJ, James DJ. 2000. Rotation and activity in the solar-type stars of NGC 2547. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 316(4), 950-960. link> doi>
  • Hopwood MEL, Evans A, Roberts TP, Burleigh MR, Odenkirchen M, Beardmore AP, O'Brien T, Jeffries RD, Penny A, Eyres SPS. 2000. A possible detection of diffuse extended X-ray emission in the environment of the globular cluster NGC 6779. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 316(1), L5-L8. link> doi>
  • Micela G, Sciortino S, Jeffries RD, Thurston MR, Favata F. 2000. Rosat HRI observations of the open cluster NGC 2516. ASTRONOMY & ASTROPHYSICS, vol. 357(3), 909-919. link>
  • Pozzo M, Jeffries RD, Naylor T, Totten EJ, Harmer S, Kenyon M. 2000. The discovery of a low-mass, pre-main-sequence stellar association around gamma Velorum. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 313(2), L23-L27. link> doi>
  • Jeffries RD. 1999. On the lithium abundance dispersion in late-type Pleiades stars. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 309(1), 189-194. link> doi>
  • Jeffries RD and James DJ. 1999. Lithium in Blanco 1: Implications for stellar mixing. ASTROPHYSICAL JOURNAL, vol. 511(1), 218-224. link> doi>
  • Eibe MT, Byrne PB, Jeffries RD, Gunn AG. 1999. Evidence for large-scale, global mass inflow and flaring on the late-type fast rotator BD+22 degrees 4409. ASTRONOMY & ASTROPHYSICS, vol. 341(2), 527-538. link>
  • Jeffries RD, James DJ, Thurston MR. 1998. Rotation and lithium in the late-type stars of NGC 2516. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 300(2), 550-560. link> doi>
  • Jeffries RD and Tolley AJ. 1998. X-ray emission and low-mass stars in the young open cluster NGC 2547. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 300(2), 331-351. link> doi>
  • Jeffries RD. 1998. A ROSAT observation of the eclipsing binary system XY UMa. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 295(4), 825-833. link> doi>
  • Byrne PB, Aziz HA, Amado PJ, Arevalo MJ, Avgoloupis S, Doyle JG, Eibe MT, Elliott KH, Jeffries RD, Lanzafame AC, Lazaro C, Murphy HM, Neff JE, Panov KP, Sarro LM, Seiradakis JH, Spencer RE. 1998. The photosphere and chromosphere of the RS Canum Venaticorum star, II Pegasi - II. A multi-wavelength campaign in August/September 1992. ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, vol. 127(3), 505-519. link>
  • James DJ and Jeffries RD. 1997. Rotation, activity and lithium in NGC 6475. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 292(2), 252-272. link>
  • Jeffries RD. 1997. Membership and lithium abundances of late-type stars in NGC 6633. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 292(1), 177-191. link>
  • Jeffries RD. 1997. On the initial-final mass relation and maximum mass of white dwarf progenitors. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 288(3), 585-588. link>
  • Jeffries RD, Thurston MR, Pye JP. 1997. An X-ray survey of the young open cluster NGC 2516. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 287(2), 350-380. link>
  • Jeffries RD and Smalley B. 1996. Excess barium in a K dwarf white dwarf binary system. ASTRONOMY & ASTROPHYSICS, vol. 315(1), L19-L22. link>
  • Jeffries RD, Buckley DAH, James DJ, Stauffer JR. 1996. 2RE J0241-525: A nearby post-T Tauri visual binary system. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 281(3), 1001-1015. link>
  • Corbett EA, Robinson A, Axon DJ, Hough JH, Jeffries RD, Thurston MR, Young S. 1996. The appearance of broad H alpha in BL Lacertae. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 281(3), 737-749. link>
  • Jeffries RD and Stevens IR. 1996. Wind-accretion induced rapid rotation and a new class of active star. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 279(1), 180-190. link>
  • Jeffries RD, Burleigh MR, Robb RM. 1996. Is 2RE J0357+283 the most coronally active star in the galaxy?. ASTRONOMY & ASTROPHYSICS, vol. 305(3), L45-L48. link>
  • Manning RA, Jeffries RD, Willmore AP. 1996. Are there any isolated old neutron stars in the ROSAT Wide Field Camera survey?. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 278(2), 577-585. link>
  • JEFFRIES R, BERTRAM D, SPURGEON B. 1995. NEW, EUV-SELECTED, ACTIVE BINARIES FROM THE ROSAT WIDE-FIELD CAMERA ALL-SKY SURVEY. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 276(2), 397-408. link>
  • JEFFRIES R. 1995. THE KINEMATICS OF LITHIUM-RICH, ACTIVE LATE-TYPE STARS - EVIDENCE FOR A LOWMASS LOCAL ASSOCIATION. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 273(3), 559-572. link>
  • KELLETT B, BROMAGE G, BROWN A, JEFFRIES R, JAMES D, KILKENNY D, ROBB R, WONNACOTT D, LLOYD C, CLAYTON C. 1995. RE-0044+09 - A NEW K-DWARF RAPID ROTATOR WITH A WHITE-DWARF COMPANION. ASTROPHYSICAL JOURNAL, vol. 438(1), 364-375. link> doi>
  • JEFFRIES R, JAMES D, BROMAGE G. 1994. RE-1816+541 - A NORTHERN-HEMISPHERE ANALOG TO THE LOW-MASS RAPID ROTATOR HK-AQR. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 271(2), 476-480. link>
  • JEFFRIES R, BYRNE P, DOYLE J, ANDERS G, JAMES D, LANZAFAME A. 1994. BD+22-DEGREES-4409 - A RAPIDLY ROTATING, LOW-MASS MEMBER OF THE LOCAL ASSOCIATION. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 270(1), 153-172. link>
  • ANDERS G, JEFFRIES R, KELLETT B, COATES D. 1993. SPEEDY MIC - A VERY YOUNG, RAPIDLY ROTATING K-STAR. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 265(4), 941-945. link>
  • JEFFRIES R, ELLIOTT K, KELLETT B, BROMAGE G. 1993. RE-0618+75 - A VERY SHORT-PERIOD, BINARY DME SYSTEM. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 265(1), 81-87. link>
  • JEFFRIES R and JEWELL S. 1993. THE KINEMATICS OF ACTIVE LATE-TYPE STARS OBSERVED BY THE ROSAT WIDE-FIELD CAMERA. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 264(1), 106-120. link>
  • JEFFRIES R. 1993. PROMINENCE ACTIVITY ON THE RAPIDLY ROTATING FIELD STAR HD-197890. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 262(2), 369-376. link>
  • JEFFRIES R and BROMAGE G. 1993. GLIESE-841A - AN EUV-SELECTED CHROMOSPHERICALLY ACTIVE BINARY-SYSTEM. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 260(1), 132-140. link>
  • POUNDS K, ALLAN D, BARBER C, BARSTOW M, BERTRAM D, BRANDUARDIRAYMONT G, BREBNER G, BUCKLEY D, BROMAGE G, COLE R, COURTIER M, CRUISE A, CULHANE J, DENBY M, DONOGHUE D, DUNFORD E, GEORGANTOPOULOS I, GOODALL C, GONDHALEKAR P, GOURLAY J, HARRIS A, HASSALL B, HELLIER C, HODGKIN S, JEFFRIES R, KELLETT B, KENT B, LIEU R, LLOYD C, MCGALE P, MASON K, MATTHEWS L, MITTAZ J, PAGE C, PANKIEWICZ G, PIKE C, PONMAN T, PUCHNAREWICZ E, PYE J, QUENBY J, RICKETTS M, ROSEN S, SANSOM A, SEMBAY S, SIDHER S, SIMS M, STEWART B, SUMNER T, VALLANCE R, WATSON M, WARWICK R, WELLS A, WILLINGALE R, WILLMORE A, WILLOUGHBY G, WONNACOTT D. 1993. THE ROSAT WIDE FIELD CAMERA ALL-SKY SURVEY OF EXTREME-ULTRAVIOLET SOURCES .1. THE BRIGHT SOURCE CATALOG. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 260(1), 77-102. link>
  • JEFFRIES R. 1991. THE TRANSITION REGION STRUCTURE OF AR LACERTAE. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 253(3), 369-376. link>
  • JEFFRIES R and BEDFORD D. 1990. AN X-RAY FLARE ON THE SHORT-PERIOD, ECLIPSING BINARY XY UMA. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 246(2), 337-340. link>
  • SMITH R, Jeffries RD, Oliveira JM. Debris discs in the 27 Myr old open cluster IC4665. MNRAS. doi>

Other

  • Jeffries RD. 2012. Are There Age Spreads in Star Forming Regions?. STAR CLUSTERS IN THE ERA OF LARGE SURVEYS (pp. 163-170). link> doi>
  • Jeffries RD. 2012. MEASURING THE INITIAL MASS FUNCTION OF LOW MASS STARS AND BROWN DWARFS. LOW-MASS STARS AND THE TRANSITION STARS/BROWN DWARFS (vol. 57, pp. 45-89). link> doi>
  • Jeffries RD. 2009. Age spreads in star forming regions?. AGES OF STARS (vol. 4, pp. 95-102). link> doi>
  • Jeffries RD. 2006. Pre-main-sequence lithium depletion. Chemical Abundances and Mixing in Stars in the Milky Way and Its Satellites (pp. 163-170). link> doi>
  • Ford A, Jeffries RD, Smalley B. 2005. Oxygen in the Blanco 1 open cluster. NUCLEAR PHYSICS A (vol. 758, pp. 280C-283C). link> doi>
  • Jeffries RD and Maxted PFL. 2005. Close binary systems among very low-mass stars and brown dwarfs. ASTRONOMISCHE NACHRICHTEN (vol. 326, pp. 944-947). link> doi>
  • Ashwell JF, Jeffries RD, Smalley B, Deliyannis CP, Steinhauer A, King JR. 2005. The Li overabundance of J37: Diffusion or accretion?. Proceedings of the 13th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun - Proceedings, Vols 1 and 2 (vol. 560, pp. 403-405). link>
  • Ford A, Jeffries RD, Smalley B. 2004. Lithium abundances from the 6104 Angstrom line in Pleiades stars: the two-component simulations.
  • Oliveira JM, Jeffries RD, van Loon JT, Kenyon MJ. 2003. Young stars and their circumstellar disks in the sigma orionis cluster. OPEN ISSUES IN LOCAL STAR FORMATION (vol. 299, pp. 55-62). link>
  • Totten EJ, Jeffries RD, Stauffer JR, Hodgkin ST. 2001. A Search for low-mass stars and brown dwarfs in the young open cluster NGC2547. 11th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun.
  • Flaccomio E, Adams N, Damiani F, Drake JJ, Evans NR, Favata F, Freeman P, Harnden FR, Jeffries RD, Kashyop V, Micela G, Patten BM, Sciortino S, Stauffer J, Wolk SJ, Zombeck MV. 2001. Chandra Observations of the young open cluster NGC2516. From Darkness to Light.
  • Pozzo M, Jeffries RD, Naylor T. 2001. Interpreting the low-mass PMS stars in Cep OB3b. American Astronomical Society Meeting 198.
  • Ford A, Jeffries RD, James DJ, Ryan SG. 2001. Lithium Abundances in Halo stars from the 614A line. 11th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun.
  • Ford A, Jeffries RD, James DJ, Barnes JR. 2001. Lithium in the Coma Berenices Open Cluster. 11th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun.
  • Pozzo M, Jeffries RD, Naylor T, Totten EJ, Harmer S, Kenyon M, Walter FM. 2001. On the low mass, pre-main-sequence stellar association discovered around gamma 2 velorum. FROM DARKNESS TO LIGHT: ORIGIN AND EVOLUTION OF YOUNG STELLAR CLUSTERS (vol. 243, pp. 801-806). link>
  • Pozzo M, Jeffries RD, Totten EJ, Harmer S, Kenyon M, Walter F. 2001. On the low-mass pre-main sequence association around Gamma (2) Velorum. From Darkness to Light.
  • Jeffries RD, Totten EJ, James DJ. 2001. Rotation and Activity in NGC2547. 11th Cambridge workshop on cool stars, stellar systems and the sun.
  • Naylor T, Pozzo M, Jeffries RD. 2001. The age spread in Cepheus OB3b. From Darkness to Light.
  • Stauffer JR, Jeffries RD, Martin EL, Terndrup DM. 2001. The ages distances and mass functions of young clusters and associations. 11th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun.
  • Webb NA, Naylor T, Jeffries RD. 2001. The discovery of starspots in Cataclysmic Variables. Evolution of binary and multiple star systems.
  • Jeffries RD and Naylor T. 2001. The Lithium Depletion Boundary as a clock and thermometer. From Darkness to Light.
  • Totten EJ, Jeffries RD, Harmer S, Pye J. 2000. A comparison of X-ray activity for members of NGC 6633, the Hyades and Praesepe. STELLAR CLUSTERS AND ASSOCIATIONS: CONVECTION, ROTATION, AND DYNAMOS (vol. 198, pp. 451-454). link>
  • Totten EJ, Jeffries RD, Hambly NC. 2000. A photometric catalogue for the young, open cluster NGC 6633. STELLAR CLUSTERS AND ASSOCIATIONS: CONVECTION, ROTATION, AND DYNAMOS (vol. 198, pp. 55-58). link>
  • Jeffries RD. 2000. Lithium depletion in open clusters. STELLAR CLUSTERS AND ASSOCIATIONS: CONVECTION, ROTATION, AND DYNAMOS (vol. 198, pp. 245-254). link>
  • Jeffries RD, Totten EJ, Stauffer JR, Navascues DBY, Hambly NC. 2000. The lithium depletion boundary and age of NGC 2547. STELLAR CLUSTERS AND ASSOCIATIONS: CONVECTION, ROTATION, AND DYNAMOS (vol. 198, pp. 281-284). link>
  • Jeffries RD. 2000. Wide-Field instrumentation on UK telescopes. STELLAR CLUSTERS AND ASSOCIATIONS: CONVECTION, ROTATION, AND DYNAMOS (vol. 198, pp. 509-512). link>
  • Totten EJ, Jeffries RD, Harmer S. 1999. X-rays from NGC 6633. SOLAR AND STELLAR ACTIVITY: SIMILARITIES AND DIFFERENCES (vol. 158, pp. 103-107). link>
  • Jeffries RD. 1999. X-rays from open clusters. SOLAR AND STELLAR ACTIVITY: SIMILARITIES AND DIFFERENCES (vol. 158, pp. 75-86). link>
  • Jeffries RD. 1996. Are there prominences around binary systems?. STELLAR SURFACE STRUCTURE (pp. 461-468). link>
  • JEFFRIES R, JAMES D, PROSSER C, STAUFFER J, BALACHANDRAN S, BROMAGE G, CAILLAULT J, PYE J, STERN R. 1994. Chromospheric and Coronal activity in NGC 6475. COOL STARS, STELLAR SYSTEMS, AND THE SUN - 8TH CAMBRIDGE WORKSHOP (vol. 64, pp. 101-103). link>
  • JEFFRIES R, JAMES D, BROMAGE G. 1994. EUV selected short-period binary systems. COOL STARS, STELLAR SYSTEMS, AND THE SUN - 8TH CAMBRIDGE WORKSHOP (vol. 64, pp. 98-100). link>
  • JEFFRIES R and JAMES D. 1994. Lithium rich stars in the solar neighbourhood. COOL STARS, STELLAR SYSTEMS, AND THE SUN - 8TH CAMBRIDGE WORKSHOP (vol. 64, pp. 288-290). link>

Year 1

  • PHY-10020 Maths component
  • PHY-10021 Maths component
  • PHY-10022 Maths component
  • PHY-10023 Maths component
  • PHY-10024 Maths Component

Year 3

  • PHY-30003 The Physics of Compact Objects
  • PHY-30004 Electromagnetism & Radiation (Module leader)
  • PHY-30012 Electromagnetism (Module leader)