A census of AGB stars in Local Group galaxies. II. NGC 185 and NGC 147

Details A census of AGB stars in Local Group galaxies. II. NGC 185 and NGC 147 A census of AGB stars in Local Group galaxies. II. NGC 185 and NGC 147

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...403...93n&link_type=abstract

Astronomy and Astrophysics, v.403, p.93-103 (2003)

Astronomy and Astrophysics

Astrophysics

30

Stars: Agb And Post-Agb, Stars: Carbon, Galaxies: Local Group, Galaxies: Individual: Ngc 185, Ngc 147, Surveys

Scientific paper

We present results of our ongoing photometric survey of Local Group galaxies, using a four filter technique based on the method of Wing (\cite{Wing71}) 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 , bolometric magnitudes M_bol, luminosity functions, and the spatial/radial distributions of the C stars in both galaxies.
Based on observations made with the Nordic Optical Telescope operated on the island of La Palma jointly by Denmark, Finland, Iceland, Norway, and Sweden, in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias.
Table A.1 is only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strabg.fr/cgi-bin/qcat?J/A+A/403/93

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