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HR 4657 - evidence for a thick-disk field blue straggler *
Klaus Fuhrmann and
Received 8 February 1999 / Accepted 20 May 1999
Observational evidence for mass and angular momentum transfer from a companion that is now a white dwarf is presented for the nearby HR 4657 (F5V), a single-lined spectroscopic binary of the Milky Way's thick-disk population. With an orbital period of 850 days the results support the possible importance of long period, low radial velocity amplitude binaries as a viable mechanism, among others, for the blue-straggler phenomenon.
Key words: stars: fundamental parameters stars: individual: HR 4657 stars: blue stragglers stars: white dwarfs
Online publication: June 6, 1999