IUE Observations of Ultraviolet Bright Stars in M3

Details IUE Observations of Ultraviolet Bright Stars in M3 IUE Observations of Ultraviolet Bright Stars in M3

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...254..110b&link_type=abstract

Astronomy and Astrophysics, Vol.254, NO. FEB(I), P. 110, 1992

Astronomy and Astrophysics

Astrophysics

13

Clusters: Globular, Stars: Evolution Of, Stars: Luminosities Of, Stars: Temperatures Of, Uv Radiation

Scientific paper

IUE UV observations of three "UV-bright" stars in M3 are presented. The brightest object - vZ1128 - is confirmed to be a bright Post-AGB star with logL/Lsun=3.09 and Te=30,000 K, which contributes about 25% of the integrated UV light from the cluster at λ=1500Å. The nature of the two other stars, i.e. 524 (logL/Lsun=2.06, Te=33,000 K) and 7561 (iogL/Lsun=2.04, Te=35,000 K), is still controversial. They might be respectively AGB-manque' stars of the sort suggested by Greggio & Renzini (1990), or the result of mergers of binary systems according to Iben (1990), but other possibilities are considered and discussed.

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