Computer Science
Scientific paper
Aug 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999noao.prop...32d&link_type=abstract
NOAO Proposal ID #1999B-0032
Computer Science
Scientific paper
We propose to utilize the 1.5 m to survey the top ~ 2 magnitudes of the stellar population of six Local Group dwarf galaxies. Adopting a photometric technique, outlined by Brewer et al. (1995), and using four filters (V, I and two narrow band filters, TiO and CN) will allow the easy discrimination of carbon stars from M giants thus will reveal the extent of the intermediate age population in each of the six galaxy. Our primary goal is to establish the relative importance of the intermediate age population in each galaxy thus showing if star formation has taken place during most of the galaxy's life time. The well calibrated CCD photometry will also yield the photometric properties of the individual carbon stars. Because the median < M_V> of carbon stars in each galaxy is constant and independant of its metallicity, as a by-product of our survey, we will use carbon stars to confirm poorly known distances of galaxies located on the outskirt of the Local Group. Such comparison of intermediate age populations in the LG is currently impossible because too little areas of galaxies and too few galaxies have been surveyed in the past (Mateo 1998). We expect to find from half a dozen carbon stars in Phoenix to several dozens in the most massive targets.
Albert Loic
Battinelli Paolo
Demers Serge
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