Issue |
A&A
Volume 403, Number 1, May III 2003
|
|
---|---|---|
Page(s) | 93 - 103 | |
Section | Extragalactic astronomy | |
DOI | https://doi.org/10.1051/0004-6361:20030282 | |
Published online | 29 April 2003 |
A census of AGB stars in Local Group galaxies *,**
II. NGC 185 and NGC 147
1
Institut für Astronomie der Universität Wien, Türkenschanzstraße 17, 1180 Wien, Austria
2
SCFAB, Stockholm Observatory / Department of Astronomy, 106 91 Stockholm, Sweden
3
Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile
Corresponding author: W. Nowotny, nowotny@astro.univie.ac.at
Received:
13
December
2002
Accepted:
25
February
2003
We present results of our ongoing photometric survey of Local Group
galaxies, using a four filter technique based on the method of Wing
([CITE]) to identify and characterise the late-type stellar content. Two
narrow band filters centred on spectral features of TiO and CN allow us to
distinguish between AGB stars of different chemistries [M-type (O-rich) and
C-type (C-rich)]. The major parts of two dwarf galaxies of the M 31 subgroup
– NGC 185 and NGC 147 – were observed. From photometry in V and i we
estimate the tip of the RGB, and derive distance moduli
respectively. With additional photometric data in the narrow band filters
TiO and CN we identify 154 new AGB carbon stars in NGC 185 and 146 in
NGC 147. C/M ratios are derived, as well as mean absolute magnitudes
Mi
, bolometric magnitudes Mbol, luminosity functions,
and the spatial/radial distributions of the C stars in both galaxies.
Key words: stars: AGB and post-AGB / stars: carbon / galaxies: Local Group / galaxies: individual: NGC 185, NGC 147 / surveys
© ESO, 2003
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.