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

Bibcode
2020MNRAS.497.3571C
DOI
10.1093/mnras/staa1608
Casewell, S. L.; Belardi, C.; Parsons, S. G.; Littlefair, S. P.; Braker, I. P.; Hermes, J. J.; Debes, J.; Vanderbosch, Z.; Burleigh, M. R.; Gänsicke, B. T.; Dhillon, V. S.; Marsh, T. R.; Winget, D. E.; Winget, K. I.
Referencia bibliográfica

Monthly Notices of the Royal Astronomical Society

Fecha de publicación:
9
2020
Revista
Monthly Notices of the Royal Astronomical Society
Número de autores
14
Número de autores del IAC
1
Número de citas
35
Número de citas referidas
29
Descripción
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.
Proyectos relacionados
Representación de la variable cataclísmica SS Cygni (Chris Moran)
Estrellas Binarias
El estudio de las estrellas binarias es una parte esencial de la astrofísica estelar. Una gran parte de las estrellas de nuestra Galaxia y de otras galaxias se ha formado en sistemas binarios o múltiples, por lo que entender la estructura y evolución de estos sistemas es importante desde el punto de vista estelar y galáctico. Un aspecto en el que
Pablo
Rodríguez Gil
En ejecución
Tipo
Con árbitro
Física estelar e interestelar (FEEI)

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