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Eclipsing binary science via the merging of transit and doppler exoplanet survey data : a case study with the marvels pilot project and SuperWASP
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(2011) Eclipsing binary science via the merging of transit and doppler exoplanet survey data : a case study with the marvels pilot project and SuperWASP. The Astronomical Journal, Volume 142 (Number 2). Article number 50. doi:10.1088/0004-6256/142/2/50 ISSN 0004-6256.
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Official URL: http://dx.doi.org/10.1088/0004-6256/142/2/50
Abstract
Exoplanet transit and Doppler surveys discover many binary stars during their operation that can be used to conduct a variety of ancillary science. Specifically, eclipsing binary stars can be used to study the stellar mass-radius relationship and to test predictions of theoretical stellar evolution models. By cross-referencing 24 binary stars found in the MARVELS Pilot Project with SuperWASP photometry, we find two new eclipsing binaries, TYC 0272-00458-1 and TYC 1422-01328-1, which we use as case studies to develop a general approach to eclipsing binaries in survey data. TYC 0272-00458-1 is a single-lined spectroscopic binary for which we calculate a mass of the secondary and radii for both components using reasonable constraints on the primary mass through several different techniques. For a primary mass of M 1 = 0.92 ± 0.1 M ☉, we find M 2 = 0.610 ± 0.036 M ☉, R 1 = 0.932 ± 0.076 R ☉, and R 2 = 0.559 ± 0.102 R ☉, and find that both stars have masses and radii consistent with model predictions. TYC 1422-01328-1 is a triple-component system for which we can directly measure the masses and radii of the eclipsing pair. We find that the eclipsing pair consists of an evolved primary star (M 1 = 1.163 ± 0.034 M ☉, R 1 = 2.063 ± 0.058 R ☉) and a G-type dwarf secondary (M 2 = 0.905 ± 0.067 M ☉, R 2 = 0.887 ± 0.037 R ☉). We provide the framework necessary to apply this analysis to much larger data sets.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | The Astronomical Journal | ||||
Publisher: | Institute of Physics Publishing, Inc. | ||||
ISSN: | 0004-6256 | ||||
Official Date: | August 2011 | ||||
Dates: |
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Volume: | Volume 142 | ||||
Number: | Number 2 | ||||
Article Number: | Article number 50 | ||||
DOI: | 10.1088/0004-6256/142/2/50 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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