Exoplanets & Exomoons

Extrasolar Planets and Their Host Stars

By Keith Cowing
Press Release
July 24, 2017
Filed under
Extrasolar Planets and Their Host Stars

In order to understand the exoplanet, you need to understand its parent star. Astrophysical parameters of extrasolar planets are directly and indirectly dependent on the properties of their respective host stars.

These host stars are very frequently the only visible component in the systems. This book describes our work in the field of characterization of exoplanet host stars using interferometry to determine angular diameters, trigonometric parallax to determine physical radii, and SED fitting to determine effective temperatures and luminosities. The interferometry data are based on our decade-long survey using the CHARA Array. We describe our methods and give an update on the status of the field, including a table with the astrophysical properties of all stars with high-precision interferometric diameters out to 150 pc (status Nov 2016). In addition, we elaborate in more detail on a number of particularly significant or important exoplanet systems, particularly with respect to (1) insights gained from transiting exoplanets, (2) the determination of system habitable zones, and (3) the discrepancy between directly determined and model-based stellar radii. Finally, we discuss current and future work including the calibration of semi-empirical methods based on interferometric data.

Kaspar von Braun (Lowell), Tabetha Boyajian (LSU)
(Submitted on 24 Jul 2017)

Comments: 80 pages in SpringerBrief format containing a few blank pages, 16 figures, 1 table of all stars with high-precision interferometric diameters, glossary of commonly encountered terms, SpringerBrief 2017, ISBN 978-3-319-61198-3
Subjects: Earth and Planetary Astrophysics (astro-ph.EP); Solar and Stellar Astrophysics (astro-ph.SR)
DOI: 10.1007/978-3-319-61198-3
Cite as: arXiv:1707.07405 [astro-ph.EP] (or arXiv:1707.07405v1 [astro-ph.EP] for this version)
Submission history
From: Kaspar Von Braun
[v1] Mon, 24 Jul 2017 05:00:07 GMT (3247kb,D)

Explorers Club Fellow, ex-NASA Space Station Payload manager/space biologist, Away Teams, Journalist, Lapsed climber, Synaesthete, Na’Vi-Jedi-Freman-Buddhist-mix, ASL, Devon Island and Everest Base Camp veteran, (he/him) 🖖🏻