Stellar diameters and temperatures - V. 11. Newly characterized exoplanet host stars

von Braun, Kaspar and Boyajian, Tabetha S. and van Belle, Gerard T. and Kane, Stephen R. and Jones, Jeremy and Farrington, Chris and Schaefer, Gail and Vargas, Norm and Scott, Nic and ten Brummelaar, Theo A. and Kephart, Miranda and Gies, Douglas R. and Ciardi, David R. and Lopez-Morales, Mercedes and Mazingue, Cassidy and McAlister, Harold A. and Ridgway, Stephen and Goldfinger, P. J. and Turner, Nils H. and Sturmann, Laszlo (2014) Stellar diameters and temperatures - V. 11. Newly characterized exoplanet host stars. Monthly Notices of the Royal Astronomical Society, 438 (3). pp. 2413-2425. ISSN 0035-8711

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Abstract

We use near-infrared interferometric data coupled with trigonometric parallax values and spectral energy distribution fitting to directly determine stellar radii, effective temperatures and luminosities for the exoplanet host stars 61 Vir, Ρ CrB, GJ 176, GJ 614, GJ 649, GJ 876, HD 1461, HD 7924, HD 33564, HD 107383 and HD 210702. Three of these targets are M dwarfs. Statistical uncertainties in the stellar radii and effective temperatures range from 0.5 to 5 per cent and from 0.2 to 2 per cent, respectively. For eight of these targets, this work presents the first directly determined values of radius and temperature; for the other three, we provide updates to their properties. The stellar fundamental parameters are used to estimate stellar mass and calculate the location and extent of each system's circumstellar habitable zone. Two of these systems have planets that spend at least parts of their respective orbits in the system habitable zone: two of GJ 876's four planets and the planet that orbits HD 33564. We find that our value for GJ 876's stellar radius is more than 20 per cent larger than previous estimates and frequently used values in the astronomical literature.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Access to published version in accordance with the copyright policy of the publisher.
Faculty / Department / School: No Faculty
Date Deposited: 14 Jun 2017 06:29
Last Modified: 27 Jun 2017 04:29
Uncontrolled Keywords: Infrared stars; Planetary systems; fundamental parameters; late-type stars;interferometric;
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1093/mnras/stt2360
URI: http://eprints.usq.edu.au/id/eprint/32117

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