2008A&A...478..487B


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET02:59:37

2008A&A...478..487B - Astronomy and Astrophysics, volume 478, 487-496 (2008/2-1)

A spectroscopic study of southern (candidate) γ Doradus stars. II. Detailed abundance analysis and fundamental parameters.

BRUNTT H., DE CAT P. and AERTS C.

Abstract (from CDS):

The γ Doradus stars are a recent class of variable main sequence F-type stars located on the red edge of the Cepheid instability strip. They pulsate in gravity modes, and this makes them particularly interesting for detailed asteroseismic analysis, which can provide fundamental knowledge of properties near the convective cores of intermediate-mass main sequence stars. To improve current understanding of γ Dor stars through theoretical modelling, additional constraints are needed. Our aim is to estimate the fundamental atmospheric parameters and determine the chemical composition of these stars. Detailed analyses of single stars have previously suggested links to Am and λ Boo stars, so we wish to explore this interesting connection between chemical peculiarity and pulsation. We analysed a sample of γ Dor stars for the first time, including nine bona fide and three candidate members of the class. We determined the fundamental atmospheric parameters and compared the abundance pattern with other A-type stars. We used the semi-automatic software package VWA for the analysis. This code relies on the calculation of synthetic spectra and thus takes line-blending into account. This is important because of the fast rotation in some of the sample stars, and we made a thorough analysis of how VWA performs when increasing v sin i. We obtained good results in agreement with previously derived fundamental parameters and abundances in a few selected reference stars with properties similar to the γ Dor stars. We find that the abundance pattern in the γ Dor stars is not distinct from the constant A- and F-type stars we analysed.

Abstract Copyright:

Journal keyword(s): stars: fundamental parameters - stars: abundances - stars: chemically peculiar - stars: early-type - stars: oscillations - stars: variables: general

Simbad objects: 25

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Number of rows : 25

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HD 7455 * 01 13 42.4885875457 -50 39 31.053166552   8.89 8.43     F5V 18 0
2 V* V529 And gD* 01 27 26.6726118342 +41 06 04.183109728   6.711 6.425     A7m 73 0
3 V* FO Cet gD* 02 06 10.7295548331 -10 16 34.378661464   7.03 6.73     F0V 45 0
4 V* EP Cet gD* 02 24 09.5670395425 -16 15 15.485076741   6.96 6.67     F0IV/V 46 0
5 * kap Ret PM* 03 29 22.6772397 -62 56 15.099119   5.10 4.71     F3IV/V 159 1
6 V* IK Eri gD* 04 09 07.7474691737 -16 23 58.030561187   8.49 8.16     F2V 42 0
7 * gam Dor gD* 04 16 01.5882311191 -51 29 11.919063290   4.55 4.20     F1V 294 0
8 HD 27604 ** 04 18 40.0263041089 -52 51 36.339744991       7.03   F7IV/V 46 0
9 HD 32115 SB* 05 00 39.8076842834 -02 03 57.710120718   6.60 6.32     A9V 67 0
10 * zet Dor PM* 05 05 30.6561782324 -57 28 21.728931803   5.215 4.708     F9VFe-0.5 221 0
11 HD 37594 * 05 39 31.1505275696 -03 33 52.928620584   6.260 5.974     A9V 76 0
12 V* AC Lep gD* 06 00 17.6603127836 -12 54 00.115324998   6.548 6.195     F2IV 46 0
13 V* V350 CMa gD* 06 42 46.0439873451 -22 26 54.933639357   6.56 6.23     F2V 59 0
14 HD 49434 gD* 06 48 19.0657567870 -01 19 08.128922715   6.015 5.731     F0V+ 86 0
15 HD 49933 ** 06 50 49.831 -00 32 27.18           F3V 335 2
16 V* V769 Mon gD* 07 59 03.9469610054 -04 19 56.701455763   7.26 6.97     A9/F0IV 28 0
17 HD 85964 El* 09 54 28.9391460365 -37 17 24.393135339   7.93 7.52   7.018 F3IV/V 25 0
18 * gam Vir A PM* 12 41 39.6237654353 -01 26 57.821832451   3.80 3.440     F1-F2V 375 0
19 * lam Boo dS* 14 16 23.0187965 +46 05 17.900526 4.31 4.26 4.18 4.16 4.13 A0Va_lB 330 0
20 V* MX Vir dS* 14 17 41.7805868934 -21 49 43.855513478   7.78 7.35     F2II 30 0
21 V* V349 Vir Al* 14 26 03.0934116582 -00 41 30.290081592   8.740 8.306     F5V 31 0
22 V* IN Lib RR* 15 17 32.0806069187 -10 30 02.156961680   7.64 7.30     F3IV/V 24 0
23 V* V2502 Oph gD* 18 17 04.8405513469 +01 00 20.626289799   6.91 6.61     F2V 98 0
24 V* DI Gru EB* 23 06 48.0110467978 -38 47 38.808572716   9.07 8.70     F3IV 18 0
25 HD 218396 El* 23 07 28.7156905667 +21 08 03.302133882   6.21 5.953     F0+VkA5mA5 935 0

    Equat.    Gal    SGal    Ecl

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2021.02.26-02:59:37

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