AGB Stars in Globular Clusters
- Autor(en)
- Thomas Lebzelter, Kenneth H. Hinkle, Michael Lederer, Thomas Posch
- Abstrakt
From our study of AGB stars in globular clusters we present here three results: (1) Period-luminosity relations derived for the long-period variables in four clusters show a similar splitting into two sequences but also differ in the maximum luminosity reached. (2) C/O ratios measured in O-rich AGB stars in NGC 1846 prove the increase of C/O with luminosity, but also reveal exceptions to the general trend. (3) AGB stars in 47 Tuc reveal a remarkable change of mid-infrared dust features as the stars evolve up the AGB.
- Organisation(en)
- Institut für Astrophysik
- Externe Organisation(en)
- National Optical Astronomy Observatory, Tucson
- Publikationsdatum
- 2007
- ÖFOS 2012
- 1030 Physik, Astronomie
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/3d2b8c9b-4d31-448a-a44d-826ad1858c6f