Browsing by Author "Burningham, B."

Now showing items 21-40 of 62

    • 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 ...

    • Discovery of the first L dwarf plus giant binary system and eight other ultracool dwarfs in wide binaries 

      Zhang, Z.; Pinfield, D.J.; Day-Jones, A.C.; Burningham, B.; Jones, H.R.A.; Yu, S.; Jenkins, J.S.; Han, Z.; Galvez-Ortiz, M.C.; Gallardo, J.; Garcia Perez, A.E.; Weights, D.; Tinney, C.G.; Pokorny, R.S. (2010)
      We identify 806 ultracool dwarfs (of which 34 are newly discovered L dwarfs) from their Sloan Digital Sky Survey (SDSS) riz photometry and obtain proper motions through cross-matching with the United Kingdom Infrared ...

    • Discovery of the first white dwarf + T dwarf binary system and the use of white dwarfs as age calibrators 

      Day-Jones, Avril; Pinfield, D.J.; Ruiz, M.; Beaumont, H.; Gallardo, J.; Gianninas, A.; Bergeron, P.; Napiwotzki, Ralf; Jenkins, J.S.; Burningham, B.; Zhang, Z.H.; Jones, H.R.A.; Murray, D.; Catalan, Silvia; Ines Gomes, Joana (American Institute of Physics (AIP), 2010)
      We present the discovery of the first white dwarf + T dwarf binary system. Systems containing a white dwarf and a brown dwarf are rare but can be used to place constraints on the age of the binary, making them valuable ...

    • The discovery of the T8.5 dwarf UGPS J0521+3640 

      Burningham, B.; Lucas, P.W.; Leggett, S.K.; Smart, R.; Baker, D.; Pinfield, D.J.; Tinney, C. G.; Homeier, D.; Allard, F.; Zhang, Z. H.; Gomes, J.; Day-Jones, A. C.; Jones, H.R.A.; Kovacs, G.; Lodieu, N.; Marocco, F.; Murray, D. N.; Sipocz, B. (2011-06)
      We have carried out a search for late-type T dwarfs in the UKIRT Infrared Deep Sky Survey Galactic Plane Survey 6th Data Release. The search yielded two persuasive candidates, both of which have been confirmed as T dwarfs. ...

    • The distance to the cool T9 brown dwarf ULAS J003402.77-005206.7 

      Smart, R.L.; Jones, H.R.A.; Lattanzi, M.G.; Leggett, S.K.; Warren, S.J.; Adamson, A.J.; Burningham, B.; Casali, M.; Evans, D.W.; Irwin, M.J.; Pinfield, D.J. (2010)
      Aims. We demonstrate the feasibility of determining parallaxes for nearby objects with the Wide Field Camera on the United Kingdom Infrared Telescope (UKIRT) using the UKIRT Infrared Deep Sky Survey as a first epoch. We ...

    • Do accretion discs regulate the rotation of young stars 

      Littlefair, S.P.; Naylor, T.; Burningham, B.; Jeffries, R.D. (2005)

    • Estimating the low-mass IMF in OB associations : o Orionis 

      Burningham, B.; Naylor, T.; Littlefair, S.P.; Jefferies, R.D. (Springer Nature, 2005)
      We investigate the issues of contamination and exclusion in photometric membership selection techniques when applied to OB associations. We use radial velocities to calculate membership probabilities for a sample of very ...

    • Exploring the substellar temperature regime down to ~550 K 

      Burningham, B.; Pinfield, D.J.; Lucas, P.W.; Jones, H.R.A. (2008)

    • The extremely red L dwarf ULAS J222711-004547-dominated by dust 

      Marocco, F.; Day-Jones, A. C.; Lucas, P.W.; Jones, H.R.A.; Smart, R.L.; Zhang, Z. H.; Gomes, J. I.; Burningham, B.; Pinfield, D.J.; Raddi, R.; Smith, Leigh (2014-03)
      We report the discovery of a peculiar L dwarf from the United Kingdom Infrared Deep Sky Survey Large Area Survey, ULAS J222711-004547. The very red infrared photometry (MKO J-K = 2.79 +/- 0.06, WISEW1-W2 = 0.65 +/- 0.05) ...

    • 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 ...

    • High proper motion objects from the UKIDSS Galactic plane survey 

      Smith, Leigh; Lucas, P.W.; Bunce, R.; Burningham, B.; Jones, H.R.A.; Smart, R.L.; Skrzypek, N.; Rodriguez, D. R.; Faherty, J.; Barentsen, G.; Drew, J.E.; Andrei, A.H.; Catalán, S.; Pinfield, D.J.; Redburn, D. (2014-09-21)
      The UKIDSS Galactic Plane Survey (GPS) began in 2005 as a seven year effort to survey ~1800 deg2 of the northern Galactic plane in the J, H, and K passbands. The survey included a second epoch of K-band data, with a baseline ...

    • Identifying nearby field T dwarfs in the UKIDSS Galactic Clusters Survey 

      Lodieu, N.; Burningham, B.; Hambly, N.C.; Pinfield, D.J. (2009)
      We present the discovery of two new late-T dwarfs identified in the UKIRT Infrared Deep Sky Survey (UKIDSS) Galactic Clusters Survey (GCS) Data Release 2 (DR2). These T dwarfs are nearby old T dwarfs along the line of sight ...

    • A large spectroscopic sample of L and T dwarfs from UKIDSS LAS : peculiar objects, binaries, and space density 

      Marocco, F.; Jones, H.R.A.; Day-Jones, A. C.; Pinfield, D.J.; Lucas, P.W.; Burningham, B.; Zhang, Z. H.; Smart, R.L.; Gomes, J. I.; Smith, L. (2015-06-01)
      We present the spectroscopic analysis of a large sample of late-M, L, and T dwarfs from UKIDSS. Using the YJHK photometry from ULAS and the red-optical photometry from SDSS we selected a sample of 262 brown dwarf candidates ...

    • Low-mass Objects in Moving Groups 

      Galvez-Ortiz, M. C.; Clarke, J. R. A.; Pinfield, D.J.; Folkes, S. L.; Jenkins, J. S.; Perez, A. E. Garcia; Burningham, B.; Day-Jones, A. C.; Jones, H.R.A. (Astronomical Society of the Pacific, 2010)
      We present here the kinematic study of part of a 132 target sample of low-mass objects, previously selected by photometric and astrometric criteria as possible members to five young moving groups (MGs): Local Association ...

    • Low-resolution near-infrared spectroscopic signatures of unresolved ultracool companions to M dwarfs 

      Cook, Neil; Pinfield, D. J.; Marocco, F.; Burningham, B.; Jones, H. R. A.; Frith, J.; Zhong, J.; Luo, A. L.; Qi, Z. X.; Cowan, N. B.; Gromadzki, M.; Kurtev, R.G.; Guo, Y. X.; Wang, Y. F.; Song, Y. H.; Yi, Z. P.; Smart, R. L. (2017-06-01)
      We develop a method to identify the spectroscopic signature of unresolved L-dwarf ultracool companions, which compares the spectra of candidates and their associated control stars using spectral ratio differences and ...

    • Measuring ultracool properties from the UKIDSS Large Area Survey 

      Day-Jones, Avril; Marocco, F.; Pinfield, D.J.; Zhang, Zenghua; Burningham, B.; Deacon, Niall; Ruiz, Maria-Teresa; Gallardo, Jose; Jones, H.R.A.; Lucas, P.W.; Jenkins, James; Gomes, Joana; Folkes, Stuart; Clarke, James (EDP Sciences, 2013)
      We discuss the properties and of ultracool and brown dwarfs that can be measured from current large area surveys and how fundamental parameters, such as the mass function and formation history can be measured, describing ...

    • Methane and ammonia in the near-infrared spectra of late-T dwarfs 

      Canty, J. I.; Lucas, P.W.; Yurchenko, S.N.; Tennyson, Jonathan; Leggett, S.K.; Tinney, C.G.; Jones, H.R.A.; Burningham, B.; Pinfield, D.J.; Smart, R.L. (2015-06-11)
      Analysis of T dwarfs using model atmospheres has been hampered by the absence of reliable line lists for methane and ammonia. Newly computed high-temperature line lists for both of these important molecules are now available, ...

    • A method for selecting M dwarfs with an increased likelihood of unresolved ultracool companionship 

      Cook, Neil; Pinfield, D.J.; Marocco, F.; Burningham, B.; Jones, H.R.A.; Frith, James; Zhong, J.; Luo, A.; Qi, Z.; Lucas, P.W.; Gromadzki, Mariusz; Day-Jones, Avril; Kurtev, Radostin; Guo, Y.; Wang, Y.; Bai, Y.; Yi, Z.; Smart, R. (2016-04-01)
      Locating ultracool companions to M dwarfs is important for constraining low-mass formation models, the measurement of substellar dynamical masses and radii, and for testing ultracool evolutionary models. We present an ...

    • Mid-infrared photometry of cold brown dwarfs : diversity in age, mass and metallicity 

      Leggett, S.K.; Burningham, B.; Saumon, D.; Marley, M.; Warren, S.J.; Smart, R.L.; Jones, H.R.A.; Lucas, P.W.; Pinfield, D.J.; Tamura, M. (2010)
      We present new Spitzer Infrared Array Camera (IRAC) photometry of 12 very late-type T dwarfs: nine have [3.6], [4.5], [5.8], and [8.0] photometry and three have [3.6] and [4.5] photometry only. Combining this with previously ...