[DBL2003b] 417 , the SIMBAD biblio

2003A&A...410..795D - Astronomy and Astrophysics, volume 410, 795-801 (2003/11-2)

Carbon star survey in the Local Group. VII. NGC 3109 a galaxy without a stellar halo.

DEMERS S., BATTINELLI P. and LETARTE B.

Abstract (from CDS):

We present a CFH12K wide field survey of the carbon star population in and around NGC 3109. Carbon stars, the brightest members of the intermediate-age population, were found nearly exclusively in and near the disk of NGC 3109, ruling out the existence of an extensive intermediate-age halo like the one found in NGC 6822. Over 400 carbon stars identified have <MI≥-4.71, confirming the nearly universality of mean magnitude of C star populations in Local Group galaxies. Star counts over the field reveal that NGC 3109 is a truncated disk shaped galaxy without an extensive stellar halo. The minor axis star counts reach the foreground density between 4' and 5', a distance that can be explained by an inclined disk rather than a spheroidal halo. We calculate a global C/M ratio of 1.75±0.20, a value expected for such a metal poor galaxy.

Abstract Copyright:

Journal keyword(s): galaxies: individual: NGC 3109 - galaxy stellar content - galaxy structure

VizieR on-line data: <Available at CDS (J/A+A/410/795): table2.dat>

Nomenclature: Table 2: [DBL2003b] NNN (Nos 1-446).

Simbad objects: 455

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