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.
Referencia bibliográfica

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

Fecha de publicación:
12
2012
Revista
Astronomy and Astrophysics
Número de autores
6
Número de autores del IAC
1
Número de citas
13
Número de citas referidas
11
Descripción
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
Proyectos relacionados
Una vista de nuestra galaxia, la Vía Láctea, con sus vecinos cercanos, las Nubes de Magallanes
Evolución Galáctica en el Grupo Local
La formación y evolución de galaxias es un problema fundamental en Astrofísica. Su estudio requiere “viajar atrás en el tiempo”, para lo cual hay dos enfoques complementarios. El mas extendido consiste en analizar las propiedades de las galaxias a diferentes distancias cosmológicas. Nuestro equipo se concentra en el otro enfoque, denominado
Matteo
Monelli
En ejecución
Tipo
Con árbitro
La Vía Láctea y el Grupo Local (MWLG)
Galaxias
Grupo local

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