Evidence for white dwarfs in the globular cluster NGC 6752

Details Evidence for white dwarfs in the globular cluster NGC 6752 Evidence for white dwarfs in the globular cluster NGC 6752

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...224l...9r&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 224, Aug. 15, 1978, p. L9-L13. Research supported by the National Re

Mathematics

Probability

14

Astronomical Photography, Globular Clusters, Stellar Spectrophotometry, White Dwarf Stars, Electrophotometers, Photographic Plates, Ubv Spectra

Scientific paper

Results are reported for a search for white dwarfs in the globular cluster NGC 6752, which was carried out using a deep U and B plate pair. A total of 61 candidate objects are found to have measurable U and B images. A (U-B) color less than -0.4 is determined for 46 of these objects. It is tentatively suggested that a substantial fraction of the 46 objects may constitute a white-dwarf component in NGC 6752. Evidence is cited which indicates that there may be a sequence extending from an absolute B magnitude of +8.4 at (U-B) equals -0.9 to an absolute B magnitude of +9.2 at (U-B) equals -0.6 for 27 of these objects with a greater than 50% probability of being cluster members. It is noted that this sequence is considerably brighter than the white-dwarf component in either the Hyades or M67.

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