On the distance and reddening of the starburst galaxy IC10

Abstract

We present deep and accurate optical photometry of the Local Group starburst galaxy IC10. The photometry is based on two sets of images collected with the Advanced Camera for Surveys and with the Wide Field Planetary Camera 2 on board the Hubble Space Telescope. We provide new estimates of the Red Giant Branch tip (TRGB) magnitude, m_{F814W}^{TRGB}=21.90+-0.03, and of the reddening, E(B-V)=0.78+-0.06, using field stars in the Small Magellanic Cloud (SMC) as a reference. Adopting the SMC and two globulars, Omega Centauri and 47 Tucanae, as references we estimate the distance modulus to IC10: independent calibrations give weighted average distances of mu=24.51+-0.08 (TRGB) and mu=24.56+-0.08 (RR Lyrae). We also provide a new theoretical calibration for the TRGB luminosity, and using these predictions we find a very similar distance to IC10 (mu~24.60+-0.15). These results suggest that IC10 is a likely member of the M31 subgroup.

4 pages, 4 figures, ApJ Letters accepted

References in corpus (7)

• Updated Electron-Conduction Opacities: The Impact on Low-Mass Stellar Models
• The influence of chemical composition on the properties of Cepheid stars. II-The iron content
• Past and present star formation in the SMC: NGC 346 and its neighborhood
• Comparison of Distances from RR Lyrae Stars, the Tip of the Red-Giant Branch and Classical Cepheids
• Fe and Al Abundances for 180 Red Giants in the Globular Cluster Omega Centauri (NGC 5139)
• Relative distances of Omega Centauri and 47 Tucanae
• A comprehensive study of Cepheid variables in the Andromeda galaxy. Period distribution, blending and distance determination

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• On the stellar content of the starburst galaxy IC10
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• The Karl G. Jansky Very Large Array Local Group L-band Survey (LGLBS)
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• Euclid: Early Release Observations -- The star cluster systems of the Local Group dwarf galaxies IC 10 and NGC 6822
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