Abundance of zinc in Hg-Mn stars

Journal Article · Mon Feb 01 04:00:00 EST 1988 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/166048· OSTI ID:7222557

Sadakane, K; Jugaku, J; Takada-Hidai, M

The resonance line of singly ionized zinc (Zn II) at 2062.00 A is quantitatively analyzed, and the abundances of Zn in atmospheres of early-type stars have been determined for the first time. The line is analyzed in IUE spectra of six reference (normal) stars between spectral types B5 and A0 and of 23 Hg-Mn stars. The abundances of Zn in the reference stars coincide with the solar value within + or - 0.5 dex. Zn is overabundant in five Hg-Mn stars, while it is underabundant by at least 1.0 dex in 12 of them. The Hg-Mn stars Phi Her and Mu Lep show the strongest and the weakest Zn II lines, respectively, and the abundance of Zn in Phi Her is at least 100,000 times higher than that in Mu Lep. No clear dependence of the Zn abundance on the effective temperature is found. There also is no clear correlation between the degree of abundance anomaly of Zn and those of the two neighboring elements Cu and Ga. A definite nonsolar abundance pattern, excesses of both Cu and Ga over Zn, is found for six Hg-Mn stars. 32 references.

• Research Organization: Osaka Univ. of Education, (Japan); Tokyo Astronomical Observatory, Mitaka (Japan); Tokai Univ., Hiratsuka (Japan)
• OSTI ID: 7222557
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 325; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ATMOSPHERES
CHEMICAL COMPOSITION
COMPARATIVE EVALUATIONS
COPPER
ELEMENTS
GALLIUM
MAIN SEQUENCE STARS
MANGANESE
METALS
SPECTRA
STARS
STELLAR ATMOSPHERES
SUN
TRANSITION ELEMENTS
ULTRAVIOLET SPECTRA
ZINC