2005A&A...435L..13N


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.28CET21:07:31

2005A&A...435L..13N - Astronomy and Astrophysics, volume 435, L13-16 (2005/5-3)

Evidence for a co-moving sub-stellar companion of GQ Lup.

NEUHAEUSER R., GUENTHER E.W., WUCHTERL G., MUGRAUER M., BEDALOV A. and HAUSCHILDT P.H.

Abstract (from CDS):

We present a companion of the ≤2Myr young classical T Tauri star GQ Lup in the Lupus star forming region at 140±50pc from imaging, astrometry, and spectroscopy. With direct K-band imaging using VLT/NACO, we detected an object 6mag fainter than GQ Lup located 0.7'' west of it. Compared to images obtained 2 to 5 years earlier with Subaru/CIAO and HST/PC, this object shares the proper motion of GQ Lup by 5 and 7σ, respectively, hence it is a co-moving companion. Its K-L' color is consistent with a spectral type early to mid L. Our NACO K-band spectrum yields spectral type M9-L4 with H2O and CO absorption, consistent with the new GAIA-Dusty template spectrum for logg≃2 to 3 and Teff≃2000K with ∼2Rjup radius at ∼140pc, hence few Jupiter masses. Using the theoretical models from Wuchterl & Tscharnuter (2003A&A...398.1081W), Burrows et al. (1997ApJ...491..856B), and Baraffe et al. (2002A&A...382..563B), the mass lies between 1 and 42 Jupiter masses.

Abstract Copyright:

Journal keyword(s): low-mass stars - substellar companions - brown dwarfs - extra-solar planets - GQ Lup

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 2MASSI J0829066+145622 BD* 08 29 06.6326394950 +14 56 22.044624693           L2V 20 0
2 NAME TW Hya Association As* 11 01.9 -34 42           ~ 839 0
3 TWA 27 LM* 12 07 33.4676156527 -39 32 54.016042897     19.95 17.99 15.88 M8IVe 314 0
4 NAME Lupus I Cld 15 43 02.1 -34 09 06           ~ 235 0
5 CD-35 10525 Or* 15 49 12.1055573607 -35 39 05.053991067 12.19 12.76 11.66 11.15   K7Ve 252 0
6 NAME Lup Cloud SFR 16 03 -38.1           ~ 549 0
7 HD 159402 * 17 36 40.1108096947 -44 33 52.705078730 7.54 8.08 8.13     B3III/IV 29 0

    Equat.    Gal    SGal    Ecl

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2021.02.28-21:07:31

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