Browsing by Author "Andrei, A.H."

Now showing items 1-7 of 7

    • A 1500 deg(2) near infrared proper motion catalogue from the UKIDSS Large Area Survey 

      Smith, Leigh; Lucas, P.W.; Burningham, B.; Jones, H.R.A.; Smart, R.L.; Andrei, A.H.; Catalan, S.; Pinfield, D.J. (2014-02)
      The United Kingdom Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) began in 2005, with the start of the UKIDSS programme as a 7 year effort to survey roughly 4000 deg(2) at high Galactic latitudes in Y, J, H and ...

    • 49 new T dwarfs identified using methane imaging 

      Cardoso, C. V.; Burningham, B.; Smart, R. L.; Spaandonk, L. van; Baker, D.; Smith, L. C.; Andrei, A.H.; Bucciarelli, B.; Dhital, S.; Jones, H.R.A.; Lattanzi, M. G.; Magazzu, A.; Pinfield, D.J.; Tinney, C. G. (2015-07-01)
      We present the discovery of 49 new photometrically classified T dwarfs from the combination of large infrared and optical surveys combined with follow-up TNG photometry. We used multi-band infrared and optical photometry ...

    • 76 T dwarfs from the UKIDSS LAS : benchmarks, kinematics and an updated space density 

      Burningham, B.; Cardoso, C. V.; Smith, Leigh; Leggett, S.K.; Smart, R.L.; Mann, A. W.; Dhital, S.; Lucas, P.W.; Tinney, C.G.; Pinfield, D.J.; Zhang, Z.; Morley, C.; Saumon, D.; Aller, K.; Littlefair, S. P.; Homeier, D.; Lodieu, N.; Deacon, Niall; Marley, M. S.; van Spaandonk, L.; Baker, D.; Allard, F.; Andrei, A.H.; Canty, J.; Clarke, J.; Day-Jones, A. C.; Dupuy, T.; Fortney, J. J.; Gomes, J.; Ishii, M.; Jones, H.R.A.; Liu, M.; Magazzu, A.; Marocco, F.; Murray, D. N.; Rojas-Ayala, B.; Tamura, M. (2013-07)
      We report the discovery of 76 new T dwarfs from the UKIRT Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS). Near-infrared broad- and narrow-band photometry and spectroscopy are presented for the new objects, along ...

    • 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 ...

    • Parallaxes of Five L Dwarfs with a Robotic Telescope 

      Wang, Y.; Jones, H.R.A.; Smart, R.L.; Marocco, F.; Pinfield, D.J.; Shao, Z.; Steele, I.A.; Zhang, Z.; Andrei, A.H.; Burgasser, A. J.; Cruz, K. L.; Yu, J.; Clarke, J. R. A.; Leigh, C.J.; Sozzetti, A.; Murray, D. N.; Burningham, B. (2014-01-01)
      We report the parallax and proper motion of five L dwarfs obtained with observations from the robotic Liverpool Telescope. Our derived proper motions are consistent with published values and have considerably smaller errors. ...

    • Parallaxes of southern extremely cool objects (PARSEC). II : Spectroscopic follow-up and parallaxes of 52 targets 

      Marocco, F.; Andrei, A.H.; Smart, R.L.; Jones, H.R.A.; Pinfield, D.J.; Day-Jones, A. C.; Clarke, J. R. A.; Sozzetti, A.; Lucas, P.W.; Bucciarelli, B.; Penna, J.L. (2013-12)
      We present near-infrared spectroscopy for 52 ultracool dwarfs, including two newly discovered late-M dwarfs, one new late-M subdwarf candidate, three new L, and four new T dwarfs. We also present parallaxes and proper ...

    • Parallaxes of southern extremely cool objects. I. : Targets, proper motions, and first results 

      Andrei, A.H.; Smart, R.L.; Penna, J.L.; d'Avila, V.A.; Bucciarelli, B.; Camargo, J.I.B.; Crosta, M.T.; Dapra, M.; Goldman, B.; Jones, H.R.A.; Lattanzi, M.G.; Nicastro, L.; Pinfield, D.J.; da Silva Neto, D. N.; Teixeira, R. (2011)
      We present results from the PARallaxes of Southern Extremely Cool objects ( PARSEC) program, an observational program begun in 2007 April to determine parallaxes for 122 L and 28 T southern hemisphere dwarfs using the Wide ...