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Titolo:
The discovery of a field methane dwarf from Sloan Digital Sky Survey commissioning data
Autore:
Strauss, MA; Fan, XH; Gunn, JE; Leggett, SK; Geballe, TR; Pier, JR; Lupton, RH; Knapp, GR; Annis, J; Brinkmann, J; Crocker, JH; Csabai, I; Fukugita, M; Golimowski, DA; Harris, FH; Hennessy, GS; Hindsley, RB; Ivezic, Z; Kent, S; Lamb, DQ; Munn, JA; Newberg, HJ; Rechenmacher, R; Schneider, DP; Smith, JA; Stoughton, C; Tucker, DL; Waddell, P; York, DG;
Indirizzi:
Princeton Univ Observ, Princeton, NJ 08544 USA Princeton Univ Observ Princeton NJ USA 08544 erv, Princeton, NJ 08544 USA Joint Astron Ctr, United Kingdom Infrares Telescope, Hilo, HI 96720 USA Joint Astron Ctr Hilo HI USA 96720 Infrares Telescope, Hilo, HI 96720 USA Gemini N Observ, Hilo, HI 96720 USA Gemini N Observ Hilo HI USA 96720Gemini N Observ, Hilo, HI 96720 USA USN Observ, Flagstaff Stn, Flagstaff, AZ 86002 USA USN Observ Flagstaff AZ USA 86002 Flagstaff Stn, Flagstaff, AZ 86002 USA Fermi Natl Accelerator Lab, Batavia, IL 60510 USA Fermi Natl Accelerator Lab Batavia IL USA 60510 ab, Batavia, IL 60510 USA Apache Point Observ, Sunspot, NM 88349 USA Apache Point Observ Sunspot NMUSA 88349 nt Observ, Sunspot, NM 88349 USA Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA Johns Hopkins Univ Baltimore MD USA 21218 Astron, Baltimore, MD 21218 USA Lorand Eotvos Univ, Dept Phys Complex Syst, H-1117 Budapest, Hungary Lorand Eotvos Univ Budapest Hungary H-1117 yst, H-1117 Budapest, Hungary Univ Tokyo, Inst Cosm Ray Res, Tanashi, Tokyo 1888502, Japan Univ Tokyo Tanashi Tokyo Japan 1888502 Res, Tanashi, Tokyo 1888502, Japan USN Observ, Washington, DC 20392 USA USN Observ Washington DC USA 20392USN Observ, Washington, DC 20392 USA Univ Chicago, Ctr Astron & Astrophys, Chicago, IL 60637 USA Univ Chicago Chicago IL USA 60637 tron & Astrophys, Chicago, IL 60637 USA Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA PennState Univ University Pk PA USA 16802 s, University Pk, PA 16802 USA Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA Univ Michigan Ann ArborMI USA 48109 , Dept Phys, Ann Arbor, MI 48109 USA Univ Washington, Dept Astron, Seattle, WA 98195 USA Univ Washington Seattle WA USA 98195 , Dept Astron, Seattle, WA 98195 USA
Titolo Testata:
ASTROPHYSICAL JOURNAL
fascicolo: 1, volume: 522, anno: 1999,
parte:, 2
pagine: L61 - L64
SICI:
0004-637X(19990901)522:1<L61:TDOAFM>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
EXTRASOLAR GIANT PLANETS; COOL BROWN DWARF; GLIESE 229B; INFRARED SPECTRUM; SEARCH; DENIS; STARS;
Keywords:
stars : low-mass, brown dwarfs; surveys;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
43
Recensione:
Indirizzi per estratti:
Indirizzo: Strauss, MA Princeton Univ Observ, Peyton Hall, Princeton, NJ 08544 USA Princeton Univ Observ Peyton Hall Princeton NJ USA 08544 4 USA
Citazione:
M.A. Strauss et al., "The discovery of a field methane dwarf from Sloan Digital Sky Survey commissioning data", ASTROPHYS J, 522(1), 1999, pp. L61-L64

Abstract

We report the discovery of the coolest field dwarf yet known, selected as an unresolved object with extremely red colors from commissioning imaging data of the Sloan Digital Sky Survey. Its spectrum from 0.8 to 2.5 mu m is dominated by strong bands of H2O and CH4. Its spectrum and colors over this range are very similar to those of Gl 229B, the only other known example ofa methane dwarf. It is roughly 1.2 mag fainter than Gl 229B, suggesting that it lies at a distance of similar to 10 pc. Such a cool object must have a mass well below the hydrogen-burning limit of 0.08 M. and therefore is a genuine brown dwarf, with a probable mass in the range 0.015-0.06 M. for anage range of 0.3-5 Gyr.

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Documento generato il 18/08/18 alle ore 08:32:04