Photometric Study of Kepler Asteroseismic Targets

• Autorzy: Molenda-Żakowicz J. , Jerzykiewicz M. , Frasca A.
• Języki publikacji: EN

Abstrakty

EN

Reported are UBV and uvbyβ observations of 15 candidates for Kepler primary asteroseismic targets and 14 other stars in the Kepler field, carried out at the M.G. Fracastoro station of the Catania Astrophysical Observatory. These data serve to plot the 29 stars in two-parameter diagrams with the photometric indices (such as B-V or δm₁) and the atmospheric parameters (such as the MK type or [Fe/H]) as coordinates. The two-parameter diagrams show no evidence of interstellar reddening. The photometric indices B-V and β are then used to derive photometric effective temperatures, T_eff(B-V) and T_eff(β). For T_eff(B-V)>6400 K, the photometric effective temperatures turn out to be systematically higher than spectroscopic effective temperatures by 311±34 K and 346±91 K for T_eff(B-V) and T_eff(β), respectively. For T_eff(B-V)<6250 K, the agreement between T_eff(B-V) and the spectroscopic effective temperatures is very good. The photometric surface gravities, derived from c1 and β, show a range of about a factor of two greater than their spectroscopic counterparts do.

Słowa kluczowe

EN

Stars: fundamental parameters; dust; extinction

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2009
• Tom: Vol. 59, No. 2
• Strony: 213--237
• Opis fizyczny: Bibliogr. 30 poz., tab., wykr.

Twórcy

autor

Molenda-Żakowicz J.

• Astronomical Institute, University of Wrocław, ul. Kopernika 11, 51-622 Wrocław, Poland

autor

Jerzykiewicz M.

• Astronomical Institute, University of Wrocław, ul. Kopernika 11, 51-622 Wrocław, Poland

autor

Frasca A.

• Catania Astrophysical Observatory, Via S.Sofia 78, 95123 Catania, Italy

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