Article (Scientific journals)
Spectroscopic survey of Kepler stars. I. HERMES/Mercator observations of A- and F-type stars
Niemczura, E.; Murphy, S. J.; Smalley, B. et al.
2015In Monthly Notices of the Royal Astronomical Society, 450, p. 2764
Peer Reviewed verified by ORBi
 

Files


Full Text
Niemczura2015.pdf
Author preprint (1.32 MB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Astrophysics - Solar and Stellar Astrophysics
Abstract :
[en] 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 modelling 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, Fe I, and Fe II 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 Lambda 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.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Niemczura, E.
Murphy, S. J.
Smalley, B.
Uytterhoeven, K.
Pigulski, A.
Lehmann, H.
Bowman, D. M.
Catanzaro, G.
van Aarle, E.
Bloemen, S.
Briquet, Maryline ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
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.
Fagas, M.
More authors (14 more) Less
Language :
English
Title :
Spectroscopic survey of Kepler stars. I. HERMES/Mercator observations of A- and F-type stars
Publication date :
July 2015
Journal title :
Monthly Notices of the Royal Astronomical Society
ISSN :
0035-8711
eISSN :
1365-2966
Publisher :
Blackwell Publishing, Oxford, United Kingdom
Volume :
450
Pages :
2764
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Accepted for publication in MNRAS (22 pages, 6 tables)
Available on ORBi :
since 03 May 2015

Statistics


Number of views
45 (1 by ULiège)
Number of downloads
124 (0 by ULiège)

Scopus citations®
 
78
Scopus citations®
without self-citations
39
OpenCitations
 
96

Bibliography


Similar publications



Contact ORBi