期刊
ASTROPHYSICAL JOURNAL
卷 743, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/743/2/130
关键词
infrared: stars; stars: fundamental parameters; stars: individual (HD 137759); techniques: interferometric
资金
- National Science Foundation through NSF [AST-0606958]
- Georgia State University through the College of Arts and Sciences
- W.M. Keck Foundation
- NASA [NNH09AK731]
- National Aeronautics and Space Administration
- National Science Foundation
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [908253] Funding Source: National Science Foundation
We measured the angular diameter of the exoplanet host star (sic) Dra with Georgia State University's Center for High Angular Resolution Astronomy Array interferometer and, using the star's parallax and photometry from the literature, calculated its physical radius and effective temperature. We then combined our results with stellar oscillation frequencies from Zechmeister et al. and orbital elements from Kane et al. to determine the masses for the star and exoplanet. Our value for the central star's mass is 1.82 +/- 0.23 M(circle dot), which means the exoplanet's minimum mass is 12.6 +/- 1.1 M(Jupiter). Using our new effective temperature, we recalculated the habitable zone for the system, though it is well outside the star-planet separation.
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