Bibcode
DOI
Sanna, N.; Bono, G.; Stetson, P. B.; Monelli, M.; Pietrinferni, A.; Drozdovsky, I.; Caputo, F.; Cassisi, S.; Gennaro, M.; Prada Moroni, P. G.; Buonanno, R.; Corsi, C. E.; Degl'Innocenti, S.; Ferraro, I.; Iannicola, G.; Nonino, M.; Pulone, L.; Romaniello, M.; Walker, A. R.
Bibliographical reference
The Astrophysical Journal, Volume 688, Issue 2, pp. L69-L73.
Advertised on:
12
2008
Journal
Citations
31
Refereed citations
27
Description
We present deep and accurate optical photometry of the Local Group
starburst galaxy IC 10. 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 tip of the red giant branch (TRGB) magnitude,
mTRGBF814W = 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, ω Cen
and 47 Tuc, as references we estimate the distance modulus to IC 10:
independent calibrations give weighted average distances of
μ=24.51+/-0.08 (TRGB) and μ=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 IC 10
(μ~24.60+/-0.15). These results suggest that IC 10 is a likely member
of the M31 subgroup.
Based on observations collected with the ACS and with the WFPC2 on board
HST.
Related projects
Milky Way and Nearby Galaxies
The general aim of the project is to research the structure, evolutionary history and formation of galaxies through the study of their resolved stellar populations, both from photometry and spectroscopy. The group research concentrates in the most nearby objects, namely the Local Group galaxies including the Milky Way and M33 under the hypothesis
Martín
López Corredoira