Distance and reddening of the Local Group dwarf irregular galaxy NGC 6822

Bibcode
2012A&A...548A.129F
DOI
10.1051/0004-6361/201220554
Pietrinferni, A.; Monelli, M.; Cassisi, S.; Bono, G.; Buonanno, R.; Fusco, F.
Bibliographical reference

Astronomy and Astrophysics, Volume 548, id.A129, 5 pp.

Advertised on:
12
2012
Journal
Astronomy and Astrophysics
Number of authors
6
IAC number of authors
1
Citations
12
Refereed citations
9
Description
On the basis of a new photometric analysis of the Local Group dwarf irregular galaxy NCG 6822 based on observations obtained with the Advanced Camera for Surveys onboard the Hubble Space Telescope, we have obtained a new estimate of the extinction of two fields located in the southeast region of the galaxy. Because of significant differences in the distance estimates to NGC 6822 available in literature, we decided to provide an independent determination of the distance to this galaxy based on an updated and self-consistent theoretical calibration of the tip of the red giant branch brightness. As a result we newly determined the distance to NGC 6822 to be equal to (m - M)0 = 23.54 ± 0.05, and compared our measurement with the most recent determinations of this distance. Based on observations collected with the ACS onboard the NASA/ESA HST.Photometric data are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/548/A129
Related projects
A view of our Milky Way galaxy with its close neighbors the Magellanic Clouds
Galaxy Evolution in the Local Group

Galaxy formation and evolution is a fundamental Astrophysical problem. Its study requires “travelling back in time”, for which there are two complementary approaches. One is to analyse galaxy properties as a function of red-shift. Our team focuses on the other approach, called “Galactic Archaeology”. It is based on the determination of galaxy

Matteo
Monelli
In progress
Type
Refereed
Galaxies
Local Group
The Milky Way and the Local Group (MWLG)

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