| Issue |
EAS Publications Series
Volume 64, 2013
Setting a New Standard in the Analysis of Binary Stars
|
|
|---|---|---|
| Page(s) | 429 - 430 | |
| Section | Posters | |
| DOI | https://doi.org/10.1051/eas/1364079 | |
| Published online | 25 February 2014 | |
K. Pavlovski, A. Tkachenko and G. Torres (eds)
EAS Publications Series, 64 (2013) 429–430
Predicting Stellar Angular Sizes
1 Max-Planck Institute for Astronomy (MPIA), Königstuhl 17, 69117 Heidelberg, Germany
2 Department of Astronomy, Yale University, New Haven, CT 06511, USA
3 Lowell Observatory, Flagstaff, AZ 86001, USA
Our survey of long-baseline infrared and optical interferometry measurements is producing considerable numbers of directly determined stellar angular sizes. We use our sample of 124 high-precision (5%) angular stellar diameter values and correlate them with stellar magnitude values from the literature to produce empirical relations for main-sequence stars between observed apparent magnitudes, stellar colors, and angular sizes (surface brightness relations). We find a significant dependence on stellar metallicity for (B − V) colors. The scatter in the calculated relations is small (∼5%), which makes them a robust tool for the prediction of main-sequence stellar angular sizes based on photometry. We apply these relations via the calculation of the radius of the multiplanet host star GJ 667 C.
© EAS, EDP Sciences, 2014