Browsing by Author "Folkes, S."

Now showing items 1-13 of 13

    • A composite HII region luminosity function in H alpha of unprecedented statistical weight 

      Bradley, T.R.; Knapen, J.; Beckman, J.E.; Folkes, S. (2006)

    • Discovery of a nearby L-T transition object in the Southern Galactic plane 

      Folkes, S.; Pinfield, D.J.; Kendall, T.R.; Jones, H.R.A. (2007)

    • Discovery of a widely separated ultracool dwarf–white dwarf binary 

      Day-Jones, A.C.; Pinfield, D.J.; Napiwotzki, R.; Burningham, B.; Jenkins, J.S.; Jones, H.R.A.; Folkes, S.; Weights, D.; Clarke, J.R.A. (2008)

    • The discovery of an M4+T8.5 binary system 

      Burningham, B.; Pinfield, D.J.; Leggett, S.K.; Tinney, C.G.; Liu, M.C.; Homeier, D.; West, A.A.; Day-Jones, A.C.; Huelamo, N.; Dupuy, T.J.; Zhang, Z.; Murray, D.N.; Lodieu, N.; Navascues, D.B.Y.; Folkes, S.; Galvez-Ortiz, M.C.; Jones, H.R.A.; Lucas, P.W.; Calderon, M.M.; Tamura, M. (2009)
      We report the discovery of a T8.5 dwarf, which is a companion to the M4 dwarf Wolf 940. [Please see original online abstract for complete version with correct notation]

    • Discovery of the benchmark metal poor T8 dwarf BD+01 2920B 

      Pinfield, D.J.; Burningham, B.; Lodieu, N.; Leggett, S.; Tinney, C.G.; van Spaandonk, L.; Marocco, F.; Smart, R.; Gomes, J.; Smith, Leigh; Lucas, P.W.; Day-jones, A.; Murray, D.; Katsiyannis, A. C.; Catalan, S.; Cardoso, C.; Clarke, James; Folkes, S.; Galvez-Ortiz, M.; Homeier, D.; Jenkins, J.; Jones, H.R.A.; Zhang, Z. (2012)
      We have searched the Wide-field Infrared Survey Explorer first data release for widely separated (<=10,000AU) late T dwarf companions to Hipparcos and Gliese stars. We have discovered a new binary system containing a K-band ...

    • Fifteen new T dwarfs discovered in the UKIDSS Large Area Survey 

      Pinfield, D.J.; Burningham, B.; Tamura, M.; Leggett, S.K.; Lodieu, N.; Lucas, P.W.; Mortlock, D.J.; Warren, S.J.; Homeier, D.; Ishi, M.; Deacon, Niall; McMahon, R.G.; Hewett, P.C.; Zapatero Osorio, M.R.; Martin, E.L.; Jones, H.R.A.; Venemans, B.P.; Day-Jones, A.C.; Dobbie, P.D.; Folkes, S.; Dye, S.; Allard, F.; Baraffe, I.; Barrado y Navascues, D.; Casewell, S.L.; Chiu, K.; Chabrier, G.; Clarke, F.; Hodgkin, S.T.; Magazzu, A.; McCaughrean, M.J.; Moraux, E.; Nakajima, T.; Pavlenko, Y.; Tinney, C.G. (2008)
      We present the discovery of fifteen new T2.5-T7.5 dwarfs (with estimated distances between 24–93pc), identified in the first three main data releases of the UKIRT Infrared Deep Sky Survey. This brings the total number of ...

    • Finding benchmark brown dwarfs to probe the sub-stellar IMF as a function of time 

      Pinfield, D.J.; Jones, H.R.A.; Lucas, R.A.; Kendall, T.R.; Folkes, S.; Day-Jones, A.C.; Chappelle, R.J.; Steele, I.A. (2006)

    • HS 2333 + 3927: a new sdB binary with a large reflection effect 

      Karl, C.; Heber, U.; Drechsel, H.; Napiwotzki, R.; Altmann, M.; Ostensen, R.; Folkes, S.; Solheim, J.E.; Cordes, O.; Voss, B.; Koester, D. (2004)
      We report the discovery of a binary, HS 2233 + 3927, consisting of an sdB star with a faint companion. From its lightcurve the orbital period of 14,844 s, the mass ratio, the inclination, and other system parameters are ...

    • HS 2333 3927: A new sdB dM binary with a large reflection effect 

      Heber, U.; Drechsel, H.; Ostensen, R.; Karl, C.; Napiwotzki, R.; Altmann, M.; Cordes, O.; Solheim, J.E.; Voss, B.; Koester, D.; Folkes, S. (2004-06)

    • The Mass of the sdB Primary of the Binary HS 2333+3927 

      Heber, U.; Drechsel, H.; Karl, C.; Ostensen, R.; Folkes, S.; Napiwotzki, R.; Altmann, M.; Cordes, O.; Solheim, J.E.; Voss, B.; Koester, D. (Astronomical Society of the Pacific, 2005)
      Short period sdB binaries with cool companions are crucial to understand pre-CV evolution, because they will evolve into cataclysmic variables, when the sdB will have left the extended horizontal branch. Recently we ...

    • New nearby, bright southern ultracool dwarfs 

      Kendall, T.R.; Jones, H.R.A.; Pinfield, D.J.; Pokorny, R.S.; Folkes, S.; Weights, D.; Jenkins, J.S.; Mauron, N. (2007)

    • Structure and star formation in disk galaxies. II. Optical Imaging 

      Knapen, J.; Stedman, S.; Bramich, D.M.; Folkes, S.; Bradley, T.R. (2004-11)

    • VVV High Proper Motion Survey 

      Gromadzki, M.; Kurtev, R.; Folkes, S.; Beamin, J. C.; Pena Ramirez, K.; Borissova, J.; Pinfield, D.J.; Jones, H.R.A.; Minniti, D.; Ivanov, V.D. (2013-10-15)
      Here we present survey of proper motion stars towards the Galactic Bulge and an adjacent plane region base on VISTA-VVV data. The searching method based on cross-matching photometric Ks-band CASU catalogs. The most interesting ...