Blue stragglers - A search for binaries in the infrared

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

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.

Fecha de publicación:
11
1991
Número de autores
4
Número de autores del IAC
2
Número de citas
10
Número de citas referidas
10
Descripción
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.
Tipo
Con árbitro
Estrellas binarias
Fotometría infrarroja
Evolución estelar

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