Blue stragglers - A search for binaries in the infrared

Bibcode
1991A&A...251...49M
Manteiga, M.; Martinez Roger, C.; Morales, C.; Sabau, L.
Bibliographical reference

Astronomy and Astrophysics (ISSN 0004-6361), vol. 251, no. 1, Nov. 1991, p. 49-58. Research supported by Ministerio de Educacion y Ciencia of Spain.

Advertised on:
11
1991
Number of authors
4
IAC number of authors
2
Citations
10
Refereed citations
10
Description
Infrared photometry in the J, H and K bands, performed on a sample of 33 blue stragglers (BS) belonging to 8 open clusters is presented. This photometry has been combined with published Johnson UBV photometry to search for possible cold companions among the BS, as expected for Case B close binary evolution. Probable binaries were identified by comparison with standard mean color relations for single stars. The number of binary detections is discussed together with the results of a previous spectroscopic search for binaries among BS (Manteiga et al. 1989), and the consequences for the hypothesis of binarity for the origin of BS are analyzed.
Type
Refereed
Binary stars
Infrared photometry
Stellar evolution

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