Far Ultraviolet Imaging of NGC 1783 with WFPC2

Details Far Ultraviolet Imaging of NGC 1783 with WFPC2 Far Ultraviolet Imaging of NGC 1783 with WFPC2

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...188.6101c&link_type=abstract

American Astronomical Society, 188th AAS Meeting, #61.01; Bulletin of the American Astronomical Society, Vol. 28, p.923

Astronomy and Astrophysics

Astronomy

Scientific paper

We have imaged the intermediate-age red LMC globular cluster NGC 1783 in two ultraviolet filters with the Hubble Space Telescope's WFPC2. In order to investigate the hot component of an aging stellar population, we observed the cluster at 1600 Angstroms (F160BW) and at 3300 Angstroms (F336W). The resulting color-magnitude diagram picks out blue straggler candidates and one or more possible post-AGB stars. We were surprised to discover a population of hot stars lying well above the cluster turnoff at effective temperatures of 10,000 to 30,000 K. Some of the implications of this anomalous hot star population for population synthesis efforts are briefly discussed.

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