SIMBAD references

2015MNRAS.450.2764N - Mon. Not. R. Astron. Soc., 450, 2764-2783 (2015/July-1)

Spectroscopic survey of Kepler stars. I. HERMES/Mercator observations of A- and F-type stars.

NIEMCZURA E., MURPHY S.J., SMALLEY B., UYTTERHOEVEN K., PIGULSKI A., LEHMANN H., BOWMAN D.M., CATANZARO G., VAN AARLE E., BLOEMEN S., BRIQUET M., DE CAT P., DROBEK D., EYER L., GAMEIRO J.F.S., GORLOVA N., KAMINSKI K., LAMPENS P., MARCOS-ARENAL P., PAPICS P.I., VANDENBUSSCHE B., VAN WINCKEL H., STESLICKI M. and FAGAS M.

Abstract (from CDS):

The Kepler space mission provided near-continuous and high-precision photometry of about 207 000 stars, which can be used for asteroseismology. However, for successful seismic modeling it is equally important to have accurate stellar physical parameters. Therefore, supplementary ground-based data are needed. We report the results of the analysis of high-resolution spectroscopic data of A- and F-type stars from the Kepler field, which were obtained with the HERMES spectrograph on the Mercator telescope. We determined spectral types, atmospheric parameters and chemical abundances for a sample of 117 stars. Hydrogen Balmer, FeI, and FeII lines were used to derive effective temperatures, surface gravities, and microturbulent velocities. We determined chemical abundances and projected rotational velocities using a spectrum synthesis technique. The atmospheric parameters obtained were compared with those from the Kepler Input Catalogue (KIC), confirming that the KIC effective temperatures are underestimated for A stars. Effective temperatures calculated by spectral energy distribution fitting are in good agreement with those determined from the spectral line analysis. The analysed sample comprises stars with approximately solar chemical abundances, as well as chemically peculiar stars of the Am, Ap, and λ Boo types. The distribution of the projected rotational velocity, vsini, is typical for A and F stars and ranges from 8 to about 280 km/s, with a mean of 134 km/s.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): stars: abundances - stars: chemically peculiar - stars: general - stars: rotation

VizieR on-line data: <Available at CDS (J/MNRAS/450/2764): table2.dat table3.dat table4.dat notes.dat>

Simbad objects: 146

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2019.12.05-23:21:16

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