Now showing items 1-12 of 12

    • Adaptive optics observations of the T10 ultracool dwarf UGPS J072227.51-054031.2 

      Bouy, H.; Girard, J.H.V.; Martin, E.L.; Huelamo, N.; Lucas, P.W. (2011)
      Context: With a spectral type of T10, UGPS J072227.51-054031.2 is one of the coolest objects known to date in the solar neighborhood. Aims: Multiple systems are relatively common among early and mid-T dwarfs. We search for ...
    • 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 ...
    • Initial Data Release from the INT Photometric H-alpha Survey of the Northern Galactic Plane (IPHAS) 

      Gonzalez-Solares, E.; Walton, N.A.; Greimel, R.; Drew, J.E.; Irwin, M.J.; Sale, S.E.; Andrews, K.; Aungwerojwit, A.; Barlow, M.J.; van den Besselaar, E.; Corradi, R.L.M.; Gaensicke, B.T.; Groot, P.; Hales, A.; Hopewell, E.C.; Hu, H.; Irwin, J.; Knigge, C.; Lagadec, E.; Leisy, P.; Lewis, J.R.; Mampaso, A.; Matsuura, M.; Moont, B.; Morales-Rueda, L.; Morris, R.A.H.; Naylor, T.; Parker, Q. A.; Prema, P.; Pyrzas, S.; Rixon, G.T.; Rodriguez-Gil, P.; Roelofs, G.; Sabin, L.; Skillen, I.; Suso, J.; Tata, R.; Viironen, K.; Vink, J.S.; Witham, A.; Wright, Nick; Zijlstra, A.A.; Zurita, A.; Drake, J.; Fabregat, J.; Lennon, D.J.; Lucas, P.W.; Martin, E.L.; Phillipps, S.; Steeghs, D.; Unruh, Y.C. (2008)
      The INT/WFC Photometric Hα Survey of the Northern Galactic Plane (IPHAS) is an imaging survey being carried out in Hα, r′ and i′ filters, with the Wide Field Camera (WFC) on the 2.5-m Isaac Newton Telescope (INT) to a depth ...
    • IPHAS discoveries of young stars towards Cyg OB2 and its southern periphery 

      Vink, J.S.; Drew, J.E.; Steeghs, D.; Wright, Nick; Martin, E.L.; Gansicke, B.T.; Greimel, R.; Drake, J. (2008)
      We report on the discovery of over 50 strong Hα emitting objects towards the large OB association Cyg OB2 and the H ii region DR 15 on its southern periphery. This was achieved using the INT Photometric Hα Survey of the ...
    • An IPHAS-based search for accreting very low-mass objects using VO tools 

      Valdivielso, L.; Martin, E.L.; Bouy, H.; Solano, E.; Drew, J.E.; Greimel, R.; Gutierrez, R.; Unruh, Y.C.; Vink, J.S. (2009)
      Context. The main goal of this paper is to prove that accreting very low-mass stars and brown dwarfs can be identified in IPHAS, an H emission survey of the northern Milky Way. Full exploitation of the IPHAS database and ...
    • Lithium in LP 944-20 

      Pavlenko, Y.; Jones, H.R.A.; Martin, E.L.; Guenther, E.; Kenworthy, M.A.; Zapatero Osorio, M.R. (2007)
    • The physical properties of four ~600 K T dwarfs 

      Leggett, S.K.; Cushing, M.C.; Saumon, D.; Marley, M.; Roellig, T.L.; Warren, S.J.; Burningham, B.; Jones, H.R.A.; Kirkpatrick, J.D.; Lodieu, N.; Lucas, P.W.; Mainzer, A.K.; Martin, E.L.; McCaughrean, M.J.; Pinfield, D.J.; Sloan, G.C.; Smart, R.L.; Tamura, M.; Van Cleve, J. (2009)
      We present Spitzer 7.6-14.5 μm spectra of ULAS J003402.77–005206.7 and ULAS J133553.45+113005.2, two T9 dwarfs with the latest spectral types currently known. We fit synthetic spectra and photometry to the near- through ...
    • Spectral analysis of high resolution near-infrared spectra of ultra cool dwarfs 

      Lyubchik, Y.; Jones, H.R.A.; Pavlenko, Y.; Martin, E.L.; McLean, I.; Prato, L.; Barber, R.J.; Tennyson, J. (2007)
    • T Tauri candidates and accretion rates using IPHAS : method and application to IC 1396 

      Barentsen, Geert; Vink, Jorick S.; Drew, J.E.; Greimel, R.; Wright, Nick; Drake, J. J.; Martin, E.L.; Valdivielso, L.; Corradi, R.L.M. (2011-07)
      The Isaac Newton Telescope (INT) Photometric H-Alpha Survey (IPHAS) is a 1800 deg(2) survey of the Northern Galactic Plane, reaching down to r' similar to 21. We demonstrate how the survey can be used to (1) reliably select ...
    • Two T dwarfs from the UKIDSS early data release 

      Kendall, T.R.; Tamura, M.; Tinney, C.G.; Martin, E.L.; Ishii, M.; Pinfield, D.J.; Lucas, P.W.; Jones, H.R.A.; Deacon, Niall (2007)
    • A very cool brown dwarf in UKIDSS DR1 

      Warren, S.J.; Mortlock, D.J.; Leggett, S.K.; Pinfield, D.J.; Homeier, D.; Dye, S.; Jameson, R.F.; Lodieu, N.; Lucas, P.W.; Adamson, A.J.; Allard, F.; Barrado y Navascues, D.; Casali, M.; Chiu, K.; Hambly, N.C.; Hewett, P.C.; Hirst, P.; Irwin, M.J.; Lawrence, A.; Liu, M.C.; Martin, E.L.; Smart, R.L.; Valdivielso, L.; Venemans, B.P. (2007)
    • Young stellar objects in NGC 6823 

      Riaz, Basmah; Martin, E.L.; Tata, R.; Monin, J-L; Phan-Bao, Ngoc; Bouy, H. (2011)
      NGC 6823 is a young open cluster that lies at a distance of ∼2 kpc in the Vulpecula OB1 association. Previous studies using CCD photometry and spectroscopy have identified a Trapezium system of bright O- and B-type stars ...