Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...235..992r&link_type=abstract
Astrophysical Journal, Part 1, vol. 235, Feb. 1, 1980, p. 992-998.
Astronomy and Astrophysics
Astronomy
64
Star Clusters, Stellar Evolution, Stellar Mass Ejection, Stellar Spectra, White Dwarf Stars, Astronomical Photometry, Electrophotometers, Hertzsprung-Russell Diagram, Open Clusters, Statistical Analysis, Stellar Models, Ultraviolet Astronomy
Scientific paper
Ultraviolet and red plates of four open clusters (NGC 2168, 2287, 2422, and 6633) have been searched for faint blue objects which might be white dwarf members of the clusters. The most massive stars in these clusters range from 3 to 6 solar masses. A definite concentration of faint blue objects is found in the clusters. This fact, plus initial photoelectric photometry, provides strong support for the identification of many of these objects as cluster white dwarfs. By modeling the expected number of possible white dwarfs in each cluster, it is possible to put some limits on mw, the upper stellar mass limit for formation of white dwarfs. The data require that some stars of at least 5 solar masses have evolved into white dwarfs and give a most probable value of 7 solar masses for m sub w.
Angel James Roger P.
Romanishin William
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