2011A&A...526A.124L


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST22:21:45

2011A&A...526A.124L - Astronomy and Astrophysics, volume 526A, 124-124 (2011/2-1)

Spectral analysis of Kepler SPB and β Cephei candidate stars.

LEHMANN H., TKACHENKO A., SEMAAN T., GUTIERREZ-SOTO J., SMALLEY B., BRIQUET M., SHULYAK D., TSYMBAL V. and DE CAT P.

Abstract (from CDS):

For asteroseismic modelling, analysis of the high-accuracy light curves delivered by the Kepler satellite mission needs support by ground-based, multi-colour and spectroscopic observations. We determine the fundamental parameters of SPB and β Cep candidate stars observed by the Kepler satellite mission and estimate the expected types of non-radial pulsators. We compared newly obtained high-resolution spectra with synthetic spectra computed on a grid of stellar parameters assuming LTE, and checked for NLTE effects for the hottest stars. For comparison, we determined Teff independently from fitting the spectral energy distribution of the stars obtained from the available photometry. We determine Teff, logg, microturbulent velocity, vsin i, metallicity, and elemental abundance for 14 of the 16 candidate stars. Two stars are spectroscopic binaries. No significant influence of NLTE effects on the results could be found. For hot stars, we find systematic deviations in the determined effective temperatures from those given in the Kepler Input Catalogue. The deviations are confirmed by the results obtained from ground-based photometry. Five stars show reduced metallicity, two stars are He-strong, one is He-weak, and one is Si-strong. Two of the stars could be β Cep/SPB hybrid pulsators, four SPB pulsators, and five more stars are located close to the borders of the SPB instability region.

Abstract Copyright:

Journal keyword(s): asteroseismology - stars: early-type - stars: variables: general - stars: atmospheres - stars: abundances

Simbad objects: 16

goto Full paper

goto View the reference in ADS

Number of rows : 16

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 BD+48 2781 Er* 18 52 28.7615791194 +48 24 14.085323925   9.65 9.840     B2.5V 14 0
2 HD 180757 Ro* 19 15 51.2236505345 +43 12 08.487996904   9.34 9.29     B8.5V 17 0
3 BD+50 2787 bC* 19 22 10.4024340997 +50 48 40.138756793   10.16 10.11   10.228 B9II-III 10 0
4 HD 234893 V* 19 25 57.5506249085 +50 54 03.381725111   9.23 9.33     B5.5IV-V 16 0
5 TYC 3135-115-1 bC* 19 31 06.7282996664 +38 19 41.720536048   10.07 10.15     B2V 8 0
6 TYC 3135-619-1 bC* 19 35 05.8087775672 +38 52 50.075341980   9.95 10.00     B2.5V 14 0
7 HD 186428 Pu* 19 42 25.7335778812 +44 01 18.318915260   8.04 8.08     B7III 18 0
8 HD 187035 Pu* 19 45 52.1261271719 +44 55 07.114653638   8.79 8.83     B7III 14 0
9 HD 234999 dS* 19 46 42.5882692487 +50 21 01.330517887   9.27 9.09     B8.5IV-V 21 0
10 HD 188459 Ro* 19 53 24.9200859835 +44 25 35.919454008   9.36 9.11     A3.5III-IV 5 0
11 HD 226628 EB* 19 55 50.9329841835 +40 23 26.865556012   9.401 9.317     B8.5III 11 0
12 HD 226700 Ro* 19 56 34.2960750770 +40 14 53.259565941   10.118 10.21     B8V 13 0
13 HD 189159 Ro* 19 56 55.3312310216 +44 20 30.676532939   9.27 9.14     B9.5IV-V 17 0
14 HD 189177 mul 19 56 58.514976 +44 40 59.26908   10.41 10.20 10.12   A0.5III-IV 9 0
15 HD 226795 Ro* 19 57 24.7715860133 +40 38 08.472099299   9.845 9.89   9.729 B5.5V 15 0
16 HD 190254 bC* 20 02 13.3712401459 +44 26 46.860037700 8.15 8.64 8.68     B4.5IV 17 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2011A&A...526A.124L and select 'bookmark this link' or equivalent in the popup menu


2020.07.03-22:21:45

© Université de Strasbourg/CNRS

    • Contact