2001A&A...371.1078A


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.28CET07:22:15

2001A&A...371.1078A - Astronomy and Astrophysics, volume 371, 1078-1083 (2001/6-1)

Elemental abundance analyses with DAO spectrograms. XXV. The superficially normal B and A stars α Draconis, τ Herculis, γ Lyrae, and HR 7926.

ADELMAN S.J., CALISKAN H., KOCER D., KABLAN H., YUECE K. and ENGIN S.

Abstract (from CDS):

Elemental abundances analyses of the superfically normal B and A stars α Dra (A0 III), τ Her (B5 IV), γ Lyr (B9 III), and HR 7926 (B8 II-III) are performed consistent with previous studies of this series using spectrograms obtained with Reticon and CCD detectors. Comparisons of the first two analyses with those of the same stars performed earlier in this series which used mostly coadded photographic plates show the general consistency of the derived elemental abundances. A slight increase in the adopted effective temperature produces a corresponding increase in the derived abundances. In these stars the He/H ratios are found to be close to solar. Except for γ Lyr the metals show for the most part marginally subsolar abundance values. But this star has Al, Ca, Sc, and Sr abundances that are substantially underabundant as well as other underabundant values.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: individual: α Dra - stars: individual: τ Her - stars: individual: γ Lyr - stars: individual: HR 7926

VizieR on-line data: <Available at CDS (J/A+A/371/1078): table5a.dat table5b.dat table5.tex>

Simbad objects: 7

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Number of rows : 7

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 * alf Dra SB* 14 04 23.3499533 +64 22 33.061896 3.520 3.640 3.680     A0III 255 0
2 * ups Her PM* 16 02 47.8971148667 +46 02 12.129177551 4.33 4.616 4.709     B9III 225 0
3 * phi Her a2* 16 08 46.1668803916 +44 56 05.732213070 3.92 4.20 4.27 4.27 4.36 B9VspHgMn 282 1
4 * tau Her Pu* 16 19 44.43666 +46 18 48.1123 3.190 3.73 3.87 4.00 4.16 B5IV 389 0
5 * tet Her V* 17 56 15.1805442 +37 15 01.934351 6.70 5.23 3.88 2.98 2.38 K1IIaCN2 207 0
6 * gam Lyr * 18 58 56.6224137 +32 41 22.400295 3.140 3.200 3.250 3.27 3.28 B9III 267 0
7 HD 197392 * 20 41 56.5018146928 +41 43 00.743088455   5.550 5.664     B8II-III 54 0

    Equat.    Gal    SGal    Ecl

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2020.10.28-07:22:15

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