A census of AGB stars in local group galaxies III. The dwarf spheroidal and II
- Autor(en)
- Franz Kerschbaum, Walter Nowotny-Schipper, Hans Olofsson, H E Schwarz
- Abstrakt
Our photometric survey of Local Group galaxies, using a four filter technique based on the method of Wing (1971) allows the identification and subsequent characterization of their late-type stellar content. Two narrow band filters centred on molecular bands of TiO and CN allow us to distinguish between AGB stars of different chemistries [M-type (O-rich) and C-type (C-rich)]. The faint dwarf spheroidal galaxy And II, a member of the M 31 subgroup, was surveyed. From photometry in V and i as well as in the narrow band filters TiO and CN we were able to identify 7 new AGB carbon stars, to derive their mean absolute and bolometric magnitude Mbol, their luminosity function, and their spatial distribution. We are unable to establish the true C/M ratio because the few M stars of And II are overwhelmed by foreground Galactic M stars.
- Organisation(en)
- Institut für Astrophysik
- Externe Organisation(en)
- Stockholm Observatory, Nordic Optical Telescope
- Journal
- Astronomy & Astrophysics
- Band
- 427
- Seiten
- 613-619
- Anzahl der Seiten
- 7
- ISSN
- 0004-6361
- DOI
- https://doi.org/10.1051/0004-6361:20041045
- Publikationsdatum
- 2004
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103003 Astronomie
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/8dd9a2fb-a66c-46d7-915e-0f59ddf9cce2