1999ApJ...522L..61S

Query : 1999ApJ...522L..61S

1999ApJ...522L..61S - Astrophys. J., 522, L61-L64 (1999/September-1)

The discovery of a field methane dwarf from sloan digital sky survey commissioning data.

STRAUSS M.A., FAN X., GUNN J.E., LEGGETT S.K., GEBALLE T.R., PIER J.R., LUPTON R.H., KNAPP G.R., ANNIS J., BRINKMANN J., CROCKER J.H., CSABAI I., FUKUGITA M., GOLIMOWSKI D.A., HARRIS F.H., HENNESSY G.S., HINDSLEY R.B., IVEZIC Z., KENT S., LAMB D.Q., MUNN J.A., NEWBERG H.J., RECHENMACHER R., SCHNEIDER D.P., SMITH J.A., STOUGHTON C., TUCKER D.L., WADDELL P. and YORK D.G.

Abstract (from CDS):

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 µm 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 of a methane dwarf. It is roughly 1.2 mag fainter than Gl 229B, suggesting that it lies at a distance of ∼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 an age range of 0.3-5 Gyr.

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Journal keyword(s): Stars: Low-Mass, Brown Dwarfs - Surveys

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HD 42581 PM* 06 10 34.6149358167 -21 51 52.656352926 10.801 9.607 8.125 7.164 6.121 M1V 544 0
2 HD 42581B BD* 06 10 34.80 -21 52 00.0           T6.5 549 0
3 2MASS J13464634-0031501 BD* 13 46 46.34496 -00 31 50.1312           T6 86 0
4 BD+26 2606 SB* 14 49 02.3593347728 +25 42 09.192358874 9.92 10.16 9.73 9.27 8.95 A5 383 0
5 2MASS J16241436+0029158 BD* 16 24 14.36712 +00 29 15.8172           T6V 162 0

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