The Mass of Progenitors of White Dwarfs in Open Clusters

Details The Mass of Progenitors of White Dwarfs in Open Clusters The Mass of Progenitors of White Dwarfs in Open Clusters

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jkas...29...53l&link_type=abstract

Journal of the Korean Astronomical Society, vol. 29, no. 1, p. 53-62

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Stars: White Dwarfs, Evolution, Cluster: Open Cluster, Initial Mass Function

Scientific paper

31 white dwarfs in 10 open clusters are examined, and their maximum mass and the upper mass limit of their progenitors are obtained as 1.22+-0.02Mo and 7.2+-0.4Mo,respectively, suggesting that the upper mass limit of white dwarfs is less than 8Mo. The final mass of white dwarfs shows no clear correlation with the initial mass of their progenitors, and it is found that a deficient gap of initial mass exists between about 4 and 5.2Mo This gap seems to correspond to the mass range for carbon detonation or deflagration. The total expected numbers of white dwarfs are 11-22 in Hyades with 7 known white dwarfs and 17 in Praesepe with 8 known white dwarfs. These known white dwrfs are all younger than the others in both clusters. But one known white dwarf in Pleiades is older one among 2-3 expected white dwarfs.

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