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Characterizing eclipsing white dwarf M dwarf binaries from multiband eclipse photometry
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Brown, Alex J., Parsons, Steven G., Littlefair, Stuart P., Wild, James F., Ashley, R. P., Breedt, E., Dhillon, V. S., Dyer, M. J., Green, M. J., Kerry, P., Marsh, T. R., Pelisoli, Ingrid and Sahman, D. I. (2022) Characterizing eclipsing white dwarf M dwarf binaries from multiband eclipse photometry. Monthly Notices of the Royal Astronomical Society, 513 (2). pp. 3050-3064. doi:10.1093/mnras/stac1047 ISSN 1745-3933.
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Official URL: http://dx.doi.org/10.1093/mnras/stac1047
Abstract
With the prevalence of wide-field, time-domain photometric sky surveys, the number of eclipsing white dwarf (WD) systems being discovered is increasing dramatically. An efficient method to follow these up will be key to determining any population trends and finding any particularly interesting examples. We demonstrate that multiband eclipse photometry of binaries containing a WD and an M dwarf can be used to determine the masses and temperatures of the WDs to better than 5 per cent. For the M dwarfs, we measure their parameters to a precision of better than 6 per cent with the uncertainty dominated by the intrinsic scatter of the M dwarf mass–radius relationship. This precision is better than what can typically be achieved with low-resolution spectroscopy. The nature of this method means that it will be applicable to LSST data in the future, enabling direct characterization without follow-up spectroscopy. Additionally, we characterize three new post-common-envelope binaries from their eclipse photometry, finding two systems containing hot helium-core WDs with low-mass companions (one near the brown dwarf transition regime) and a possible detached cataclysmic variable at the lower edge of the period gap.
| Item Type: | Journal Article | |||||||||||||||
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| Subjects: | Q Science > QB Astronomy | |||||||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||
| Library of Congress Subject Headings (LCSH): | Eclipsing binaries, White dwarf stars, Astronomical photometry, Cool stars | |||||||||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | |||||||||||||||
| Publisher: | Oxford University Press | |||||||||||||||
| ISSN: | 1745-3933 | |||||||||||||||
| Official Date: | 15 June 2022 | |||||||||||||||
| Dates: |
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| Volume: | 513 | |||||||||||||||
| Number: | 2 | |||||||||||||||
| Page Range: | pp. 3050-3064 | |||||||||||||||
| DOI: | 10.1093/mnras/stac1047 | |||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||
| Publication Status: | Published | |||||||||||||||
| Reuse Statement (publisher, data, author rights): | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society. All rights reserved. | |||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||
| RIOXX Funder/Project Grant: |
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