The Open UniversitySkip to content

The true stellar parameters of the Kepler target list

Farmer, R.; Kolb, U. and Norton, A. J. (2013). The true stellar parameters of the Kepler target list. Monthly Notices of the Royal Astronomical Society, 433(2) pp. 1133–1145.

Full text available as:
PDF (Version of Record) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (2MB) | Preview
DOI (Digital Object Identifier) Link:
Google Scholar: Look up in Google Scholar


Using population synthesis tools we create a synthetic Kepler Input Catalogue (KIC) and subject it to the Kepler Stellar Classification Program (SCP) method for deter- mining stellar parameters such as the effective temperature Teff and surface gravity g. We achieve a satisfactory match between the synthetic KIC and the real KIC in the log g vs log Teff diagram,while there is a significant difference between the actual physical stellar parameters and those derived by the SCP of the stars in the synthetic sample. We find a median difference ∆Teff = +500 K and ~ ∆ log g = −0.2 dex for main-sequence stars, and ~ ∆Teff = +50 K and ∆ log g = −0.5 dex for giants, although there is a large variation across parameter space. For a MS star the median difference in g would equate to a ~ 3% increase in stellar radius and a consequent 3% overestimate of the radius for any transiting exoplanet. We find no significant difference between ∆Teff and ∆ log g for single stars and the primary star in a binary system. We also re-created the Kepler target selection method and found that the binary fraction is unchanged by the target selection. Binaries are selected in similar proportions to single star systems; the fraction of MS dwarfs in the sample increases from about 75% to 80%, and the giant star fraction decreases from 25% to 20%.

Item Type: Journal Item
Copyright Holders: 2013 RAS
ISSN: 1365-2966
Keywords: binaries - general; Galaxy - stellar content; planetary systems; stars - evolution; stars - statistics; surveys
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 37049
Depositing User: Ulrich Kolb
Date Deposited: 03 Apr 2013 10:55
Last Modified: 04 Jul 2020 21:30
Share this page:


Altmetrics from Altmetric

Citations from Dimensions

Download history for this item

These details should be considered as only a guide to the number of downloads performed manually. Algorithmic methods have been applied in an attempt to remove automated downloads from the displayed statistics but no guarantee can be made as to the accuracy of the figures.

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU