The detectability of binary star planetary and brown dwarf companions from eclipse timing variations
Article
Article Title | The detectability of binary star planetary and brown dwarf companions from eclipse timing variations |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Getley, A. K. (Author), Carter, B. (Author), King, R. (Author) and O'Toole, S. (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 504 (3), pp. 4291-4301 |
Number of Pages | 11 |
Year | 2021 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stab1207 |
Web Address (URL) | https://academic.oup.com/mnras/article/504/3/4291/6258423 |
Abstract | In this paper, we determine the detectability of eclipsing binary star companions from eclipse timing variations using the Kepler mission data set. Extensive and precise stellar time-series photometry from space-based missions enable searches for binary star companions. However, due to the large data sets and computational resources involved, these searches would benefit from guidance from detection simulations. Our simulations start with and benefit from the use of empirical Kepler mission data, into which we inject third bodies to predict the resulting timing of binary star eclipses. We find that the orbital eccentricity of the third body and the orbital period of the host binary star are the key factors in detecting companions. Target brightness is also likely to be a factor in detecting companions. Detectable third body masses and periods can be efficiently bound using just two equations. Our results enable the setting of realistic expectations when planning searches for eclipsing binary star planetary and brown dwarf companions. Our results also suggest the brown dwarf desert is real rather than observational selection. |
Keywords | binaries: eclipsing |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2021 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Byline Affiliations | Centre for Astrophysics |
Macquarie University | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q656z/the-detectability-of-binary-star-planetary-and-brown-dwarf-companions-from-eclipse-timing-variations
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