IC 10: a starburst galaxy resolved into individual stars

We present a preliminary analysis of HST images of the Local Group galaxy IC 10. IC 10 has an unusual Wolf-Rayet star population and is believed to be undergoing a starburst. Nevertheless, stars to at least 6.5 M⊙ are seen and the young star clusters are comparable in richness and spatial concentration to LMC populous clusters.

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The Stellar Population and Star Clusters in the Unusual Local Group Galaxy IC 10

The Astrophysical Journal ◽

10.1086/322399 ◽

2001 ◽

Vol 559 (1) ◽

pp. 225-242 ◽

Cited By ~ 49

Author(s):

Deidre A. Hunter

Keyword(s):

Stellar Population ◽

Local Group ◽

Star Clusters ◽

Ic 10 ◽

Group Galaxy ◽

Local Group Galaxy

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Young Star Clusters: Progenitors of Globular Clusters!?

Highlights of Astronomy ◽

10.1017/s1539299600015987 ◽

2005 ◽

Vol 13 ◽

pp. 366-368

Author(s):

Peter Anders ◽

Uta Fritze – v. Alvensleben ◽

Richard de Grijs

Keyword(s):

Star Formation ◽

Globular Clusters ◽

Star Clusters ◽

Young Star ◽

Star Cluster ◽

Star Formation History ◽

Starburst Galaxy ◽

Major Mode ◽

Young Clusters ◽

Young Star Clusters

AbstractStar cluster formation is a major mode of star formation in the extreme conditions of interacting galaxies and violent starbursts. Young clusters are observed to form in a variety of such galaxies, a substantial number resembling the progenitors of globular clusters in mass and size, but with significantly enhanced metallicity. From studies of the metal-poor and metal-rich star cluster populations of galaxies, we can therefore learn about the violent star formation history of these galaxies, and eventually about galaxy formation and evolution. We present a new set of evolutionary synthesis models of our GALEV code, with special emphasis on the gaseous emission of presently forming star clusters, and a new tool to compare extensive model grids with multi-color broad-band observations to determine individual cluster masses, metallicities, ages and extinction values independently. First results for young star clusters in the dwarf starburst galaxy NGC 1569 are presented. The mass distributions determined for the young clusters give valuable input to dynamical star cluster system evolution models, regarding survival and destruction of clusters. We plan to investigate an age sequence of galaxy mergers to see dynamical destruction effects in process.

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The starburst galaxy IC 10

Symposium - International Astronomical Union ◽

10.1017/s0074180900206086 ◽

1999 ◽

Vol 193 ◽

pp. 482-483

Author(s):

Paul W. Hodge ◽

Daniel B. Zucker

Keyword(s):

Main Sequence ◽

Starburst Galaxy ◽

Band Emission ◽

Ic 10 ◽

The Galaxy ◽

Red Supergiants ◽

Color Data ◽

Absolute Magnitudes ◽

Group Galaxy ◽

Local Group Galaxy

The heavily-reddened Local Group galaxy IC 10 has been studied at narrow-band emission-line wavelengths and in U, B, V, and I with the APO 3.5m telescope. The four-color data are being used to measure and map the foreground and internal reddening. The color-magnitude diagram clearly isolates the main sequence from the red supergiants and from the abundant foreground stars. The absolute magnitudes of the main sequence stars, together with the anomalously-abundant WR stars reported by Massey & Armandroff, indicate that the galaxy is currently undergoing a fairly extensive burst of star-formation.

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