Stellar companions to the exoplanet host stars HD 2638 and HD 164509
Article
Article Title | Stellar companions to the exoplanet host stars HD 2638 and HD 164509 |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Wittrock, Justin M. (Author), Kane, Stephen R. (Author), Horch, Elliott P. (Author), Hirsch, Lea (Author), Howell, Steve B. (Author), Ciardi, David R. (Author), Everett, Mark E. (Author) and Teske, Johanna K. (Author) |
Journal Title | The Astronomical Journal |
Journal Citation | 152 (5), pp. 149-155 |
Article Number | 149 |
Number of Pages | 7 |
Year | 2016 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/0004-6256/152/5/149 |
Web Address (URL) | http://iopscience.iop.org/article/10.3847/0004-6256/152/5/149 |
Abstract | An important aspect of searching for exoplanets is understanding the binarity of the host stars. It is particularly important, because nearly half of the solar-like stars within our own Milky Way are part of binary or multiple systems. Moreover, the presence of two or more stars within a system can place further constraints on planetary formation, evolution, and orbital dynamics. As part of our survey of almost a hundred host stars, we obtained images at 692 and 880 nm bands using the Differential Speckle Survey Instrument (DSSI) at the Gemini-North Observatory. From our survey, we detect stellar companions to HD-2638 and HD-164509. The stellar companion to HD-2638 has been previously detected, but the companion to HD-164509 is a newly discovered companion. The angular separation for HD-2638 is 0.512±0 002 and for HD-164509 is 0.697 0. 00 ' 2. This corresponds to a projected separation of 25.6±1.9 au and 36.5±1.9 au, respectively. By employing stellar isochrone models, we estimate the mass of the stellar companions of HD-2638 and HD-164509 to be 0.483±0.007-Me and 0.416 0.007 M, respectively, and their effective temperatures to be 3570±8K and 3450±7K, respectively. These results are consistent with the detected companions being late-type M dwarfs. |
Keywords | planetary systems; stars: individual HD 2638, HD 16450); high angular resolution; |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | For access to this article, please click on the URL link provided. |
Byline Affiliations | San Francisco State University, United States |
Southern Connecticut State University, United States | |
University of California, United States | |
National Aeronautics and Space Administration (NASA), United States | |
National Optical Astronomy Observatory, United States | |
Carnegie Institution of Washington, United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q42z0/stellar-companions-to-the-exoplanet-host-stars-hd-2638-and-hd-164509
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