2020MNRAS.497.3571C

Query : 2020MNRAS.497.3571C

2020MNRAS.497.3571C - Mon. Not. R. Astron. Soc., 497, 3571-3580 (2020/September-3)

WD1032 + 011, an inflated brown dwarf in an old eclipsing binary with a white dwarf.

CASEWELL S.L., BELARDI C., PARSONS S.G., LITTLEFAIR S.P., BRAKER I.P., HERMES J.J., DEBES J., VANDERBOSCH Z., BURLEIGH M.R., GANSICKE B.T., DHILLON V.S., MARSH T.R., WINGET D.E. and WINGET K.I.

Abstract (from CDS):

We present the discovery of only the third brown dwarf known to eclipse a non-accreting white dwarf. Gaia parallax information and multicolour photometry confirm that the white dwarf is cool (9950 ± 150 K) and has a low mass (0.45 ± 0.05 M☉), and spectra and light curves suggest the brown dwarf has a mass of 0.067 ± 0.006 M☉ (70MJup) and a spectral type of L5 ± 1. The kinematics of the system show that the binary is likely to be a member of the thick disc and therefore at least 5-Gyr old. The high-cadence light curves show that the brown dwarf is inflated, making it the first brown dwarf in an eclipsing white dwarf-brown dwarf binary to be so.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): binaries: eclipsing - brown dwarfs - white dwarfs

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 V* V2384 Ori EB* 05 35 21.8473218600 -05 46 08.571352260       19.21 17.28 M7 99 1
2 CoRoT-15b BD? 06 28 27.8204 +06 11 10.477   17.012 15.997 15.807   ~ 46 1
3 HD 289002 * 06 45 13.3725491952 +02 08 14.685250596 10.06 10.62 10.44     B1 259 0
4 2QZ J103448.9+005200 WD* 10 34 48.9329384976 +00 52 01.371664956   19.23 19.2     DA3.0 26 0
5 2QZ J120515.8-024223 WD* 12 05 15.8129733888 -02 42 22.754968128   18.42       DA 35 0
6 SDSS J141126.20+200911.1 WD* 14 11 26.2220815704 +20 09 11.039979600           DA+? 41 0
7 2MASS J15104786-2818174 LM* 15 10 47.8572999576 -28 18 17.519894532           M8e 19 0
8 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14400 0
9 CoRoT-33b Pl? 18 38 33.9102478176 +05 37 28.786272924           ~ 22 0
10 Kepler-486b Pl 18 59 31.1991605400 +49 16 01.172404596           ~ 36 0

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