Casewell, S.L., Belardi, C., Parsons, S.G. orcid.org/0000-0002-2695-2654 et al. (11 more authors) (2020) WD1032+011, an inflated brown dwarf in an old eclipsing binary with a white dwarf. Monthly Notices of the Royal Astronomical Society, 497 (3). pp. 3571-3580. ISSN 0035-8711
Abstract
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.
Metadata
Authors/Creators: |
|
||||
---|---|---|---|---|---|
Copyright, Publisher and Additional Information: | © 2020 The Authors. This is an author-produced version of a paper subsequently published in Monthly Notices of the Royal Astronomical Society. Uploaded in accordance with the publisher's self-archiving policy. | ||||
Keywords: | brown dwarfs; eclipsing binaries; white dwarfs | ||||
Dates: |
|
||||
Institution: | The University of Sheffield | ||||
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) | ||||
Funding Information: |
|
||||
Depositing User: | Symplectic Sheffield | ||||
Date Deposited: | 29 Jun 2020 07:37 | ||||
Last Modified: | 06 Jan 2021 15:51 | ||||
Status: | Published | ||||
Publisher: | Oxford University Press (OUP) | ||||
Refereed: | Yes | ||||
Identification Number: | https://doi.org/10.1093/mnras/staa1608 | ||||
Related URLs: |