Spectroscopic Study of Kepler Asteroseismic Targets

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

Abstrakty

EN

Reported are spectroscopic observations of 15 candidates for Kepler primary asteroseismic targets and 14 other stars in the Kepler field, carried out at three observatories. For all these stars, the radial velocities, effective temperature, surface gravity, metallicity, and the projected rotational velocity are derived from two separate sets of data by means of two independent methods. In addition, MK type is estimated from one of these sets of data. Three stars, HIP 94335, HIP 94734, and HIP 94743, are found to have variable radial-velocity. For HIP 94335=FL Lyr, a well-known Algol-type eclipsing variable and a double-lined spectroscopic binary, the orbital elements computed from our data agree closely with those of Popper et al. For HIP 94734 and HIP 94743=V2077 Cyg, which we discover to be single-lined systems, orbital elements are derived. In addition, from our value of the orbital period and the Hipparcos epoch photometry, HIP 94743 is demonstrated to be a detached eclipsing binary.

Słowa kluczowe

EN

binaries: spectroscopic; binaries: eclipsing; Stars: fundamental parameters; Stars: individual: FL Lyr; Stars: individual: HIP 94734; Stars: individual: V2077 Cyg

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2007
• Tom: Vol. 57, No. 4
• Strony: 301--321
• Opis fizyczny: Bibliogr. 26 poz., tab., wykr.

Twórcy

autor

Molenda-Żakowicz J.

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

autor

Frasca A.

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

autor

Latham D. W.

• Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA

autor

Jerzykiewicz M.

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

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