2001A&A...370L...1E


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.09CEST07:11:49

2001A&A...370L...1E - Astronomy and Astrophysics, volume 370, L1-4 (2001/4-4)

A second substellar companion in the Gliese 86 system. A brown dwarf in an extrasolar planetary system.

ELS S.G., STERZIK M.F., MARCHIS F., PANTIN E., ENDL M. and KUERSTER M.

Abstract (from CDS):

We report observations using the ESO adaptive optics system ADONIS of the known extrasolar planetary system Gliese 86. This star has a known 4MJupsini planet in a 15.8 day orbit and exhibits an additional, large, long-period, radial velocity drift (Queloz et al., 2000A&A...354...99Q). The coronographic images reveal a faint (J=14.7, H=14.4, K=13.7) object at a projected distance of r=1.72''±0.02 and PA=119±1°. Gliese 86 and the discovered object share the same proper motion, as confirmed by independent measurements at three different epochs indicating that this system is gravitationally bound. From the infrared colors and magnitudes we infer an approximate spectral type for Gliese 86B at the transition from L to T dwarfs, also called ``early T dwarf'' assuming the classification by Leggett et al. (2000ApJ...536L..35L). Although present brown dwarf evolutionary models do not cover the mass and age range probed by this objects, an upper limit of the mass of about MGJ86B≤70MJup can be inferred from the models by Baraffe et al. (1998A&A...337..403B). Dusty model atmospheres appear not to be compatible with the IR colors.

Abstract Copyright:

Journal keyword(s): stars: individual: Gliese 86 - stars: brown dwarfs - planetary systems

Simbad objects: 11

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Number of rows : 11

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 BD+62 11 Be* 00 10 46.9219392720 +63 10 22.581019999   9.82 9.6     B5V 12 0
2 HD 13424 PM* 02 09 45.2985540749 -51 43 51.267308957   7.87 6.94     K1III/IV 11 0
3 HD 13445 PM* 02 10 25.9190575041 -50 49 25.467227759   6.945 6.117     K1.5V 414 1
4 HD 13445b Pl 02 10 25.9190575041 -50 49 25.467227759           ~ 90 1
5 HD 13445B WD* 02 10 26.20 -50 49 25.0           DQ6 38 0
6 HD 14112 PM* 02 15 25.0140910762 -50 53 14.059535244   8.92 7.90     K0III 12 0
7 * kap Eri * 02 26 59.1217747 -47 42 13.824757 3.61 4.11 4.25 4.28 4.41 B7IV 112 0
8 * tet Ori ** 05 35.3 -05 24           ~ 40 1
9 HD 42581B BD* 06 10 34.80 -21 52 00.0           T6.5 461 0
10 GJ 570 D BD* 14 57 14.96256 -21 21 47.7504           T8 194 1
11 HD 168443 PM* 18 20 03.9331764016 -09 35 44.609316076   7.62 6.92     G6V 278 1

    Equat.    Gal    SGal    Ecl

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2020.08.09-07:11:49

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