TY - GEN
T1 - PTPS candidate exoplanet host star radii determination with CHARA Array
AU - Zieliński, Paweł
AU - Vaňko, Martin
AU - Baines, Ellyn
AU - Niedzielski, Andrzej
AU - Wolszczan, Aleksander
N1 - Funding Information:
We acknowledge support from the European Community’s Seventh Framework Programme Grant 226604; the Polish Ministry of Science and Higher Education grant N N203 510938 (PZ and AN); VEGA 2/0094/11 (MV); NASA grant NNX09AB36G (AW).
PY - 2011/7
Y1 - 2011/7
N2 - We propose to measure the radii of the Penn State - Toruń Planet Search (PTPS) exoplanet host star candidates using the CHARA Array. Stellar radii estimated from spectroscopic analysis are usually inaccurate due to indirect nature of the method and strong evolutionary model dependency. Also, the so-called degeneracy of stellar evolutionary tracks due to convergence of many tracks in the giant branch decreases the precision of such estimates. However, the radius of a star is a critical parameter for the calculation of stellar luminosity and mass, which are often not well known especially for giants. With well determined effective temperature (from spectroscopy) and radius, the luminosity may be calculated precisely. In turn also stellar mass may be estimated much more precisely. Therefore, direct radii measurements increase precision in the determination of planetary candidates masses and the surface temperatures of the planets.
AB - We propose to measure the radii of the Penn State - Toruń Planet Search (PTPS) exoplanet host star candidates using the CHARA Array. Stellar radii estimated from spectroscopic analysis are usually inaccurate due to indirect nature of the method and strong evolutionary model dependency. Also, the so-called degeneracy of stellar evolutionary tracks due to convergence of many tracks in the giant branch decreases the precision of such estimates. However, the radius of a star is a critical parameter for the calculation of stellar luminosity and mass, which are often not well known especially for giants. With well determined effective temperature (from spectroscopy) and radius, the luminosity may be calculated precisely. In turn also stellar mass may be estimated much more precisely. Therefore, direct radii measurements increase precision in the determination of planetary candidates masses and the surface temperatures of the planets.
UR - http://www.scopus.com/inward/record.url?scp=84887344713&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84887344713&partnerID=8YFLogxK
U2 - 10.1017/S1743921311027360
DO - 10.1017/S1743921311027360
M3 - Conference contribution
AN - SCOPUS:84887344713
SN - 9781107019829
T3 - Proceedings of the International Astronomical Union
SP - 203
EP - 204
BT - From Interacting Binaries to Exoplanets
A2 - Richards, Mercedes
A2 - Hubeny, Ivan
ER -
