Exploratory C star search in the disk of M 31 beyond 30 kpc

Details Exploratory C star search in the disk of M 31 beyond 30 kpc Exploratory C star search in the disk of M 31 beyond 30 kpc

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26a...430..905b&link_type=abstract

Astronomy and Astrophysics, v.430, p.905-910 (2005)

Astronomy and Astrophysics

Astrophysics

6

Galaxies: Individual: M 31, Galaxies: Local Group, Galaxies: Structure, Stars: Carbon

Scientific paper

In order to investigate how far the intermediate-age population of the disk of M 31 extends we survey 450 arcmin2 along its southern major axis, from 35 kpc to 43 kpc. We identified a handful of C stars. We conclude that we have reached the edge of the M 31 disk, at least as defined by intermediate age stars. There is no evidence of density enhancement AGB stars related to the Ferguson clump possibly associated with cluster G1. Radial velocity measures could provide confirmation that the most remote C star, at 40 kpc, is indeed a member of the disk population of M 31.
Based on observations obtained with the Italian Telescopio Nazionale Galileo (TNG) operated on the island of La Palma by the Centro Nazionale Galileo Galilei of the INAF at the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias.

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