Swift/UVOT Observations of Globular Clusters in M31

Details Swift/UVOT Observations of Globular Clusters in M31 Swift/UVOT Observations of Globular Clusters in M31

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.7305h&link_type=abstract

American Astronomical Society, AAS Meeting #211, #73.05; Bulletin of the American Astronomical Society, Vol. 39, p.864

Astronomy and Astrophysics

Astronomy

Scientific paper

We used archived ultraviolet observations taken with the Swift/UVOT to study the integrated colours of several globular star clusters in the Andromeda Galaxy (M31). M31's globular clusters have ages similar to those of Galactic globular clusters. Therefore, the red giant branch stars will be too faint to contribute any ultraviolet light at the distance of M31. Our ultraviolet data probes the horizontal branch stars of these clusters and can be used to estimate the age and metallicity of each cluster. We present the first ultraviolet colour-colour diagrams of the M31 globular cluster system.

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