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Title:
Stellar diameters and temperatures - V. 11 newly characterized exoplanet host stars
Authors:
von Braun, Kaspar; Boyajian, Tabetha S.; van Belle, Gerard T.; Kane, Stephen R.; Jones, Jeremy; Farrington, Chris; Schaefer, Gail; Vargas, Norm; Scott, Nic; ten Brummelaar, Theo A.; Kephart, Miranda; Gies, Douglas R.; Ciardi, David R.; López-Morales, Mercedes; Mazingue, Cassidy; McAlister, Harold A.; Ridgway, Stephen; Goldfinger, P. J.; Turner, Nils H.; Sturmann, Laszlo
Affiliation:
AA(Max-Planck-Institute for Astronomy (MPIA), Königstuhl 17, D-69117 Heidelberg, Germany; Mirasol Institute, D-81679 Munich, Germany; ), AB(Yale University, New Haven, CT 06520-8101, USA), AC(Lowell Observatory, Flagstaff, AZ 86001 USA), AD(Department of Physics and Astronomy, San Francisco State University, 1600 Holloway Ave., San Francisco, CA 94132, USA), AE(Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, PO Box 5060, Atlanta, GA 30302-4106, USA), AF(The CHARA Array, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), AG(The CHARA Array, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), AH(The CHARA Array, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), AI(The CHARA Array, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), AJ(The CHARA Array, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), AK(Yale University, New Haven, CT 06520-8101, USA), AL(Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, PO Box 5060, Atlanta, GA 30302-4106, USA), AM(NASA Exoplanet Science Institute, California Institute of Technology, MC 100-22, Pasadena, CA 91125, USA), AN(CfA, Cambridge, MA 02138, USA), AO(Mirasol Institute, D-81679 Munich, Germany), AP(The CHARA Array, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), AQ(NOAO, Tucson, AZ 85719, USA), AR(The CHARA Array, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), AS(The CHARA Array, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), AT(The CHARA Array, Mount Wilson Observatory, Mount Wilson, CA 91023, USA)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 438, Issue 3, p.2413-2425 (MNRAS Homepage)
Publication Date:
03/2014
Origin:
OUP
Astronomy Keywords:
techniques: interferometric, stars: fundamental parameters, stars: general, stars: late-type, planetary systems, infrared: stars
Abstract Copyright:
2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
DOI:
10.1093/mnras/stt2360
Bibliographic Code:
2014MNRAS.438.2413V

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, rho 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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