| Issue |
A&A
Volume 430, Number 3, February II 2005
|
|
|---|---|---|
| Page(s) | 905 - 910 | |
| Section | Extragalactic astronomy | |
| DOI | https://doi.org/10.1051/0004-6361:20041565 | |
| Published online | 26 January 2005 | |
Exploratory C star search in the disk of M 31 beyond 30 kpc*
1
INAF – Osservatorio Astronomico di Roma, Viale del Parco Mellini 84, 00136 Roma, Italia e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
2
Département de Physique, Université de Montréal, CP 6128, Succursale Centre-Ville, Montréal, Québec H3C 3J7, Canada e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
30
June
2004
Accepted:
4
October
2004
Abstract
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.
Key words: galaxies: individual: M 31 / galaxies: local group / galaxies: structure / stars: carbon
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.
© ESO, 2005
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