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IUE observations of UB-bright stars in M 3

Journal
Date Issued
1992
Author(s)
•
Cacciari, C.
•
Fusi Pecci, F.
•
Buonanno, R.
•
Corsi, C. E.
Abstract
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.
Volume
254
Start page
110
Uri
Url
Issn Identifier
0004-6361
Ads BibCode
1992A&A...254..110B
Rights
open.access
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