SIMBAD references

1997A&A...327L..25D - Astronomy and Astrophysics, volume 327, L25-28 (1997/11-3)

Field brown dwarfs found by DENIS.

DELFOSSE X., TINNEY C.G., FORVEILLE T., EPCHTEIN N., BERTIN E., BORSENBERGER J., COPET E., DE BATZ B., FOUQUE P., KIMESWENGER S., LE BERTRE T., LACOMBE F., ROUAN D. and TIPHENE D.

Abstract (from CDS):

We present three candidate field brown dwarfs, identified by the DENIS survey. This on-going three colour survey of the southern sky has, as of July 1997, covered over 30% of the southern hemisphere in the I, J and Kshort passbands. The enormous sampled volume makes DENIS ideal for detecting brown dwarfs. The present results are based on preliminary processing of about 230 square degrees of DENIS data - a small fraction of the existing sky coverage. This reveals a sizeable population of very cold dwarfs, three of which are at least as cool as GD 165B. Infrared spectra confirm their dwarf status, and provide effective temperature information: one object (DENIS-P J1058.7-1548) is comparable in temperature to GD 165B and a second (DENIS-P J1228.2-1547) is slightly cooler, while a third (DENIS-P J0205.4-1159) is significantly so - though not as cold as Gl 229B. The infrared spectrum of DENIS-P J0205.4-1159 shows evidence for a methane absorption band, which implies an effective temperature much below the stellar limit. Lastly, recent detections of lithium in DENIS-P J1228.2-1547 have proven it to have a substellar mass. This makes it (together with the recently discovered object Kelu-1) the first bona-fide isolated field brown dwarf.

Abstract Copyright:

Journal keyword(s): stars: late-type, low-mass, brown dwarfs

Nomenclature: Table 1: DENIS-P JHHMM.m+DDMM N=3.

Status at CDS:  

CDS comments: p. L26 2MASP J0345 = 2MASP J0345432+254023.

Simbad objects: 11

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:1997A&A...327L..25D and select 'bookmark this link' or equivalent in the popup menu


2020.04.09-20:13:48

© Université de Strasbourg/CNRS

    • Contact