Published February 1968
| Published
Journal Article
Open
Analysis of F and G Subdwarfs. II. A Model-Atmosphere Abundance Analysis of the Subdwarfs HD 140283 and HD 19445
- Creators
-
Cohen, Judith G.
- Strom, Stephen E.
Abstract
A grid of model atmospheres has been used to perform an abundance analysis of these two extreme Population II stars. The abundances determined from the models confirm the general results of previous investigations, namely that metals are deficient by a factor of about 100 relative to average Population I abundances. A marginal deficiency of s-process material relative to the average deficiency is found; the carbon deficiencies are comparable to those of the other elements and for HD 19445 the α-process elements are enhanced. From the analysis it also appears that convection plays a significant role in determining the temperature structure of subdwarf atmospheres.
Additional Information
© American Astronomical Society • Provided by the NASA Astrophysics Data System. Received April 25, 1967; revised August 9, 1967. Part of this research was supported by contract NGR 22-024-001 from the National Aeronautics and Space Administration.Attached Files
Published - 1968ApJ___151__623C.pdf
Files
1968ApJ___151__623C.pdf
Files
(868.7 kB)
| Name | Size | Download all |
|---|---|---|
|
md5:6acd0b02c472128dcc63b367fdcc20d2
|
868.7 kB | Preview Download |
Additional details
- Eprint ID
- 95850
- Resolver ID
- CaltechAUTHORS:20190529-103831668
- NGR 22-024-001
- NASA
- Created
-
2019-05-29Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field