The 2MASS wide-field T dwarf search.

V. Discovery of a T dwarf via methane imaging

S. C. Ellis*, C. G. Tinney, Adam J. Burgasser, J. Davy Kirkpatrick, Michael W. McElwain

*Corresponding author for this work

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We present the discovery of a T dwarf, 2MASS 2151-4853, via differential imaging through methane filters. The filters are designed to highlight the strong absorption in the H band due to methane found in the atmospheres of T dwarfs and provide a very efficient means of searching for them. Subsequent J- and H-band spectroscopy confirms 2MASS 2151-4853 as a T dwarf of type T4.5. It has an estimated spectrophotometric distance of 18 ± 3 pc and an estimated tangential velocity of v t = 50 ± 10 km s -1.

Original languageEnglish
Pages (from-to)2347-2351
Number of pages5
JournalAstronomical Journal
Volume130
Issue number5
DOIs
Publication statusPublished - 1 Nov 2005
Externally publishedYes

Keywords

  • Stars: individual (2MASS J21513839-4853542)
  • Stars: low-mass, brown dwarfs

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    Ellis, S. C., Tinney, C. G., Burgasser, A. J., Kirkpatrick, J. D., & McElwain, M. W. (2005). The 2MASS wide-field T dwarf search. V. Discovery of a T dwarf via methane imaging. Astronomical Journal, 130(5), 2347-2351. https://doi.org/10.1086/491790