ATOMIC TRANSITION-PROBABILITIES;
OSCILLATOR-STRENGTHS;
SOLAR ABUNDANCE;
B-STAR;
LOG(GF) VALUES;
MAIN-SEQUENCE;
SPECTROSCOPIC BINARIES;
EFFECTIVE TEMPERATURES;
ROTATIONAL VELOCITIES;
TERM SYSTEM;
D O I:
10.1086/680998
中图分类号:
P1 [天文学];
学科分类号:
0704 ;
摘要:
We performed a fine analysis of the normal sharp-lined A0 IV star gamma Geminorum with spectra having signal-to-noise ratios at the continuum of 500-1200 that were consistent with previous studies of this series. Our spectra have wavelength ranges of lambda lambda 3829-4730, 4873-4931, 4983-5042, and 5070-5210. The spectra measured with the program REDUCE have a two-pixel resolution of 0.072 angstrom. We used ATLAS9 models and the program WIDTH9 to derive the abundances of the metals. Most derived abundances are close to solar with the abundances of the heaviest elements Zr, Ba, La, Ce, and Nd showing greater than solar values. This suggests by comparison with the abundances of other normal and Am stars that gamma Gem might exhibit an incipient Am star phenomenon.
机构:
NATL UNIV LA PLATA,FAC CIENCIAS ASTRON & GEOFIS,RA-1900 LA PLATA,ARGENTINANATL UNIV LA PLATA,FAC CIENCIAS ASTRON & GEOFIS,RA-1900 LA PLATA,ARGENTINA
ABT, HA
MORRELL, NI
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机构:
NATL UNIV LA PLATA,FAC CIENCIAS ASTRON & GEOFIS,RA-1900 LA PLATA,ARGENTINANATL UNIV LA PLATA,FAC CIENCIAS ASTRON & GEOFIS,RA-1900 LA PLATA,ARGENTINA
机构:
NATL UNIV LA PLATA,FAC CIENCIAS ASTRON & GEOFIS,RA-1900 LA PLATA,ARGENTINANATL UNIV LA PLATA,FAC CIENCIAS ASTRON & GEOFIS,RA-1900 LA PLATA,ARGENTINA
ABT, HA
MORRELL, NI
论文数: 0引用数: 0
h-index: 0
机构:
NATL UNIV LA PLATA,FAC CIENCIAS ASTRON & GEOFIS,RA-1900 LA PLATA,ARGENTINANATL UNIV LA PLATA,FAC CIENCIAS ASTRON & GEOFIS,RA-1900 LA PLATA,ARGENTINA