Observations and atmospheric parameters of super-metal-rich candidates

被引:15
作者
Malagnini, ML
Morossi, C
Buzzoni, A
Chavez, M
机构
[1] Univ Trieste, Dipartimento Astron, I-34131 Trieste, Italy
[2] Observ Roque Muchachos, Telescopio Nazl Galileo, Santa Cruz De La Palma 38700, Canary Islands, Spain
[3] Osservatorio Astron Trieste, I-34131 Trieste, Italy
[4] Osservatorio Astron Brera, I-23807 Merate, Lc, Italy
[5] Inst Nacl Astrofis Opt & Elect, Puebla 72000, Mexico
关键词
D O I
10.1086/317714
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The spectroscopic properties of a sample of 92 Population I bright stars (V < 8) with literature values of [Fe/H] <greater than or equal to> +0.1 are reviewed in order to study the metallicity scale at supersolar regimes. For 73 of these candidate super-metal-rich (SMR) stars we identified the photospheric fiducial parameters (T-eff, log g, [M/H]) from among published parameter sets via a comparison of new observations in the wavelength range 5034-5398 Angstrom with synthetic spectra derived from the 1997 database of Chavez et al. As a main issue in our analysis, we find that a "genuine" SMR stellar component in the Galactic disk exists with more than one-fourth of the stars in our sample fulfilling the criterion [Fe/H] greater than or equal to 0.2 dex, and three of them as rich as [Fe/H] > +0.4 dex.
引用
收藏
页码:1455 / 1466
页数:12
相关论文
共 56 条
[1]   OXYGEN ABUNDANCES IN UNEVOLVED METAL-POOR STARS - INTERPRETATION AND CONSEQUENCES [J].
ABIA, C ;
REBOLO, R .
ASTROPHYSICAL JOURNAL, 1989, 347 (01) :186-194
[2]   ABUNDANCES OF THE ELEMENTS - METEORITIC AND SOLAR [J].
ANDERS, E ;
GREVESSE, N .
GEOCHIMICA ET COSMOCHIMICA ACTA, 1989, 53 (01) :197-214
[3]  
[Anonymous], A AS
[4]  
BARBUY B, 1988, ASTRON ASTROPHYS, V191, P121
[5]  
Bell R. A., 1978, Astronomy and Astrophysics Supplement Series, V34, P229
[6]  
BELL RA, 1971, MMRAS, V153, P57
[7]  
BERTHET S, 1990, ASTRON ASTROPHYS, V227, P156
[8]  
BESSELL MS, 1989, ASTRON ASTROPHYS SUP, V77, P1
[9]  
BESSELL MS, 1991, APJ, V383, P71
[10]   OLD STELLAR POPULATIONS .1. A SPECTROSCOPIC COMPARISON OF GALACTIC GLOBULAR-CLUSTERS, M31 GLOBULAR-CLUSTERS, AND ELLIPTICAL GALAXIES [J].
BURSTEIN, D ;
FABER, SM ;
GASKELL, CM ;
KRUMM, N .
ASTROPHYSICAL JOURNAL, 1984, 287 (02) :586-609