SpringerLink
Forum Springer Astron. Astrophys.
Forum Whats New Search Orders


Astron. Astrophys. 363, 130-140 (2000)

Next Section Table of Contents

Infrared photometry of the Local Group dwarf irregular galaxy IC 10

J. Borissova 1, L. Georgiev 2, M. Rosado 2, R. Kurtev 3, A. Bullejos 2 and M. Valdez-Gutiérrez 4

1 Institute of Astronomy, Bulgarian Academy of Sciences and Isaac Newton Institute of Chile Bulgarian Branch, 72 Tsarigradsko Chaussèe, 1784 Sofia, Bulgaria (jura@haemimont.bg)
2 Instituto de Astronomía, Universidad Nacional Autónoma de México, México (georgiev,margarit@astroscu.unam.mx)
3 Department of Astronomy, Sofia University and Isaac Newton Institute, Branch at Sofia University, James Bourchier Ave. 5, 1164 Sofia, Bulgaria (kurtev@phys.uni-sofia.bg)
4 Instituto Nacional de Astrofísica, Optica y Electrónica, México (mago@inaoep.mx)

Received 25 February 1999 / Accepted 16 June 2000

Abstract

We present near infrared JHK photometry for the central area of the irregular dwarf galaxy IC 10. Red stellar population of IC 10 contains young (10-50 Myr) massive red supergiants. Most of AGB stars are younger than 1 Gyr and have masses up to 12 [FORMULA]. Comparing the red supergiants of IC 10 and IC 1613 we have determined the reddening of [FORMULA] and the dereddened distance modulus [FORMULA] mag of Population I stars in IC 10. Detection of six [FORMULA] emission structures clearly outline two star forming regions in the central area of IC 10. There is no [FORMULA] emission down to 4.65 [FORMULA] [FORMULA] indicating that the dominant excitation mechanism of the molecular gas is from UV radiation from hot young stars. From the comparison of [FORMULA] and [FORMULA] fluxes, we derive average extinction toward the star forming regions [FORMULA]. The summarized SFR derived from six [FORMULA] and [FORMULA] emission structures in our field of view is 0.6 [FORMULA]

Key words: galaxies: Local Group – galaxies: individual: IC 10, IC 1613 – galaxies: stellar content

Send offprint requests to: J. Borissova

SIMBAD Objects

Contents

Next Section Table of Contents

© European Southern Observatory (ESO) 2000

Online publication: December 5, 2000
helpdesk.link@springer.de