Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2010-10-26
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
6 pages, 2 figures, 1 table, Proceedings to the 17th European White Dwarf Workshop, T\"ubingen
Scientific paper
We present results of a survey of post-asymptotic giant branch stars (post-AGBs) at high galactic latitude. To date, few post-AGB stars are known throughout the Galaxy and the number of known members of the older populations like the galactic halo is even smaller. This study looks at the number of post-AGB stars which are produced using different synthetic population methods and compare the results with observations. The resulting synthetic populations are compared to observational results from a complete and studied subsample from the photographic Palomar-Green (PG) survey (with high resolution spectroscopic follow-up for post-AGB candidates) and the SDSS spectroscopic database. The results show only two candidate post-AGB stars in a complete subsample of the PG survey spanning 4200 square degrees and one in the SDSS database. We discuss and explore any observational biases which may cause the result. If found to be truely representative of the halo population, one can expect the majority of Population II stars to fail to ascend the AGB and evolve through other evolutionary channels such as the extended horizontal branch.
Catalan S.
Napiwotzki Ralf
Weston Stuart
No associations
LandOfFree
Anyone out there? Galactic Halo Post-AGB stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Anyone out there? Galactic Halo Post-AGB stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anyone out there? Galactic Halo Post-AGB stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-159587