Issue |
A&A
Volume 427, Number 2, November IV 2004
|
|
---|---|---|
Page(s) | 613 - 619 | |
Section | Stellar structure and evolution | |
DOI | https://doi.org/10.1051/0004-6361:20041045 | |
Published online | 28 October 2004 |
A census of AGB stars in Local Group galaxies *,**
III. The dwarf spheroidal And II
1
Institut für Astronomie der Universität Wien, Türkenschanzstraße 17, 1180 Wien, Austria e-mail: kerschbaum@astro.univie.ac.at
2
SCFAB, Stockholm Observatory / Department of Astronomy, 10691 Stockholm, Sweden
3
Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile
Received:
6
April
2004
Accepted:
20
July
2004
Our photometric survey of Local Group galaxies, using a four filter technique based on the method of Wing ([CITE]) 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 Mi
and bolometric magnitude
, 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.
Key words: stars: AGB and post-AGB / stars: carbon / galaxies: local Group / galaxies: individual: And II / techniques: photometric / surveys
© ESO, 2004
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.