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J/A+A/464/495 UBVI photometry of NGC 45 star clusters (Mora+, 2007)
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tables.dat
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Beginning of ReadMe :J/A+A/464/495 UBVI photometry of NGC 45 star clusters (Mora+, 2007)
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Imaging of star clusters in unperturbed spiral galaxies with the Advanced
Camera for Surveys. I. The low luminosity galaxy NGC 45.
Mora M.D., Larsen S.S., Kissler-Patig M.
<Astron. Astrophys., 464, 495-505 (2007)>
=2007A&A...464..495M
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ADC_Keywords: Galaxies, nearby ; Associations, stellar ; Photometry, UBVRI
Keywords: galaxies: individual: NGC 45 - galaxies: star clusters -
galaxies: photometry
Abstract:
Star clusters are present in almost all types of galaxies. Here we
investigate the star cluster population in the low-luminosity,
unperturbed spiral galaxy NGC 45, which is located in the nearby
Sculptor group. Both the old (globular) and young star-cluster
populations are studied.
Previous ground-based observations have suggested that NGC 45 has few
if any "massive" young star clusters. We aim to study the population
of lower-mass "open" star clusters and also identify old globular
clusters that could not be distinguished from foreground stars in the
ground-based data.
Star clusters were identified using UBVI imaging from the Advanced
Camera for Surveys (ACS) and the Wide Field Planetary Camera 2 (WFPC2)
on board the Hubble Space Telescope. From broad band colors and
comparison with simple stellar population (SSP) models assuming a
fixed metallicity, we derived the age, mass, and extinction. We also
measured the radius for each star cluster candidate.