dc.contributor.author |
Giridhar, S |
|
dc.contributor.author |
Arellano Ferro, A |
|
dc.date.accessioned |
2008-09-06T11:18:05Z |
|
dc.date.available |
2008-09-06T11:18:05Z |
|
dc.date.issued |
2005-11 |
|
dc.identifier.citation |
Astronomy and Astrophysics, Vol. 443, No. 1, pp. 297 - 308 |
en |
dc.identifier.issn |
0004-6361 |
|
dc.identifier.uri |
http://hdl.handle.net/2248/3418 |
|
dc.description.abstract |
We have carried out abundance analysis for a sample of high galactic latitude supergiants in search of evolved stars. We find that HD 27381 has atmospheric parameters and an abundance pattern very similar to that of the post-AGB star HD 107369. HD 10285 and HD 25291 are moderately metal-poor and show the influence of mixing that has brought the products of NeNa cycle to the surface. The high galactic latitude B supergiant HD 137569 shows selective depletion of refractory elements normally seen in post-AGB stars. We find that the high velocity B type star HD 172324 shows moderate deficiency of Fe group elements but the CNO abundances are very similar to that of disk B supergiants. The observed variations in the radial velocities, transient appearance of emission components in hydrogen line profiles and doubling of O I lines at 7774 Å support the possibility of this star being a pulsating variable or a binary star. |
en |
dc.language.iso |
en |
en |
dc.publisher |
EDP Sciences |
en |
dc.relation.uri |
http://arxiv.org/abs/astro-ph/0509061 |
en |
dc.relation.uri |
http://dx.doi.org/10.1051/0004-6361:20041495 |
en |
dc.subject |
Stars: AGB And Post-AGB |
en |
dc.subject |
Stars: Chemically Peculiar |
en |
dc.subject |
Stars: Abundances |
en |
dc.subject |
Stars: Individual HD 10132 |
en |
dc.subject |
HD 10285 |
en |
dc.subject |
HD 12533 |
en |
dc.subject |
HD 25291 |
en |
dc.subject |
HD 27381 |
en |
dc.subject |
HD 137569 |
en |
dc.subject |
HD 159251 |
en |
dc.subject |
HD 172324 |
en |
dc.title |
Chemical composition of evolved stars of high galactic latitude |
en |
dc.type |
Article |
en |