NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-12-13 T09:26:08 PST
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For refcode 2007ApJ...667..891J:
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Copyright by American Astronomical Society. Reproduced by permission
2007ApJ...667..891J A Spitzer IRAC Census of the Asymptotic Giant Branch Populations in Local Group Dwarfs. II. IC 1613 Dale C. Jackson, Evan D. Skillman, Robert D. Gehrz, Elisha Polomski, and Charles E. Woodward Abstract. We present Spitzer IRAC photometry of the Local Group dwarf irregular galaxy IC 1613. We compare our 3.6, 4.5, 5.8, and 8.0 micron photometry with broadband optical photometry and find that from the optical data we cannot detect 43% and that an additional 11% of the total AGB population are misidentified, likely because of extinction caused by circumstellar material. Furthermore, we find that a narrowband optical carbon star study of IC 1613 detects 50% of the total AGB population and only considers 18% of this population in calculating the carbon to M-type AGB ratio. We derive an integrated mass-loss rate from the AGB stars of (0.2 -- 1.0)x10^-3^ M_sun_ yr^-1^ and find that the distribution of bolometric luminosities and mass-loss rates are consistent with those for other nearby metal-poor galaxies. Both the optical completeness fractions and mass-loss rates in IC 1613 are very similar to those in the Local Group dwarf irregular galaxy WLM, which is expected, given their similar characteristics and evolutionary histories. Key words: Galaxies: Dwarf, Galaxies: Individual: IC 1613, Galaxies: Irregular, Galaxies: Local Group, Stars: AGB and Post-AGB, Stars: Carbon, Stars: Mass Loss
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