Isotopic abundances of Hg in mercury stars inferred from Hg ii lambda3984
Journal Article
·
· Astrophys. J.; (United States)
Wavelengths of Hg ii lambda3984 in 30 Hg stars are distributed uniformly from the value for the terrestrial mix to a value that corresponds to nearly pure /sup 204/Hg. The wavelengths are correlated loosely with effective temperatures inferred from Q (UBV). Relative isotopic abundances derived from partially resolved profiles of lambda3984 in X CrB, /sub chi/ Lup, and HR 4072 suggest that mass-dependent fractionation has occurred in all three stars. It is supposed that such fractionation occurs in all Hg stars. Accordingly, a scheme is presented whereby isotopic compositions can be inferred from a comparison of stellar wavelengths and equivalent widths with those calculated for a family of fractionated isotopic mixes. Theoretical profiles calculated for the derived isotopic composition agree well with high-resolution interferometric profiles obtained for three of the stars. (AIP)
- Research Organization:
- Goddard Space Flight Center, Institute for Space Studies, New York, New Yor
- OSTI ID:
- 7354795
- Journal Information:
- Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 204:1; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Resonance line of B II in IUE spectra of chemically peculiar stars
First results from the Goddard High-Resolution spectrograph - High-resolution observations of the 1942 A resonance line of HG II in the chemically peculiar B star, Chi Lupi
Mercury in a thin layer in HgMn stars: A test of a diffusion model
Journal Article
·
Sat Nov 14 23:00:00 EST 1981
· Astrophys. J.; (United States)
·
OSTI ID:5609768
First results from the Goddard High-Resolution spectrograph - High-resolution observations of the 1942 A resonance line of HG II in the chemically peculiar B star, Chi Lupi
Journal Article
·
Thu Aug 01 00:00:00 EDT 1991
· Astrophysical Journal; (United States)
·
OSTI ID:5157121
Mercury in a thin layer in HgMn stars: A test of a diffusion model
Journal Article
·
Tue Jul 01 00:00:00 EDT 1980
· Astrophys. J.; (United States)
·
OSTI ID:6735387
Related Subjects
640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALINE EARTH METALS
CHEMISTRY
COSMOCHEMISTRY
ELEMENTS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FRACTIONATION
GALLIUM
HEAVY NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPE RATIO
ISOTOPES
MERCURY 196
MERCURY 198
MERCURY 199
MERCURY 200
MERCURY 201
MERCURY 202
MERCURY 204
MERCURY ISOTOPES
METALS
MINUTES LIVING RADIOISOTOPES
NONMETALS
NUCLEI
PHOSPHORUS
PLATINUM
PLATINUM METALS
RADIOISOTOPES
SCANDIUM
SEMIMETALS
SEPARATION PROCESSES
SILICON
STABLE ISOTOPES
STARS
STRONTIUM
TRANSITION ELEMENTS
YTTRIUM
ZIRCONIUM
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALINE EARTH METALS
CHEMISTRY
COSMOCHEMISTRY
ELEMENTS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FRACTIONATION
GALLIUM
HEAVY NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPE RATIO
ISOTOPES
MERCURY 196
MERCURY 198
MERCURY 199
MERCURY 200
MERCURY 201
MERCURY 202
MERCURY 204
MERCURY ISOTOPES
METALS
MINUTES LIVING RADIOISOTOPES
NONMETALS
NUCLEI
PHOSPHORUS
PLATINUM
PLATINUM METALS
RADIOISOTOPES
SCANDIUM
SEMIMETALS
SEPARATION PROCESSES
SILICON
STABLE ISOTOPES
STARS
STRONTIUM
TRANSITION ELEMENTS
YTTRIUM
ZIRCONIUM