Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...153..260k&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 153, no. 1, Dec. 1985, p. 260-264.
Astronomy and Astrophysics
Astrophysics
37
Blue Stars, Star Clusters, Stellar Evolution, Stellar Spectra, White Dwarf Stars, Stellar Magnitude, Stellar Mass
Scientific paper
Deep UV and red Schmidt plates of 2 galactic clusters have been searched for faint blue white dwarf candidates. Four stars in IC 2391 and NGC 2451 are spectroscopically identified as DA white dwarfs. Consideration of distance modules and cooling ages confirms the cluster membership of NGC 2451-6. NGC 2451-1 and NGC 2451-5 may be members, although the evidence is not as convincing as for NGC 2451-6. IC 2391-1 is most probably a background object. NGC 2451, with an age of 5-8 x 10 to the 7th yr and a mass approximately 5.3 solar masses at the end of the core hydrogen burning phase, is so far the youngest cluster with a spectroscopically confirmed white dwarf member. Implications for stellar evolution and the relation between the initial (main sequence) and final white dwarf mass are discussed.
Koester Detlev
Reimers Dieter
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