STAR CLUSTERS IN THE NEARBY LATE-TYPE GALAXY NGC 1311

Journal Article · Tue Jan 15 04:00:00 EST 2008 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/135/1/120· OSTI ID:21583029

Eskridge, Paul B ^[1]; Grijs, Richard de ^[2]; Anders, Peter ^[3]; Windhorst, Rogier A; Jansen, Rolf A ^[4]

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1. Department of Physics and Astronomy, Minnesota State University, Mankato, MN 56001 (United States)
2. Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH (United Kingdom)
3. Sterrenkundig Instituut, Universiteit Utrecht, NL-3508 TA Utrecht (Netherlands)
4. School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287 (United States)

Ultraviolet, optical and near-infrared images of the nearby (D {approx} 5.5 Mpc) SBm galaxy NGC 1311, obtained with the Hubble Space Telescope, reveal a small population of 13 candidate star clusters. We identify candidate star clusters based on a combination of their luminosity, extent, and spectral energy distribution. The masses of the cluster candidates range from {approx}10{sup 3} M{sub sun} up to {approx}10{sup 5} M{sub sun}, and show a strong positive trend of larger mass with increasing with cluster age. Such a trend follows from the fading and dissolution of old, low-mass clusters, and the lack of any young super-star clusters of the sort often formed in strong starbursts. The cluster age distribution is consistent with a bursting mode of cluster formation, with active episodes of age {approx}10 Myr, {approx}100 Myr, and {approx}>Gyr. The ranges of age and mass we probe are consistent with those of the star clusters found in quiescent Local Group dwarf galaxies.

• OSTI ID: 21583029
• Journal Information: Astronomical Journal (New York, N.Y. Online), Journal Name: Astronomical Journal (New York, N.Y. Online) Journal Issue: 1 Vol. 135; ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ELECTROMAGNETIC RADIATION
ENERGY SPECTRA
GALAXIES
IMAGES
INFRARED RADIATION
LUMINOSITY
NEAR INFRARED RADIATION
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
SPECTRA
STAR CLUSTERS
TELESCOPES
ULTRAVIOLET RADIATION