THE BINARY 2ND SEQUENCE IN CLUSTER COLOR-MAGNITUDE DIAGRAMS

Authors
HURLEY J TOUT CA
Citation
J. Hurley et Ca. Tout, THE BINARY 2ND SEQUENCE IN CLUSTER COLOR-MAGNITUDE DIAGRAMS, Monthly Notices of the Royal Astronomical Society, 300(4), 1998, pp. 977-980
Citations number
17
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Monthly Notices of the Royal Astronomical Society → ACNP
ISSN journal
00358711
Volume
300
Issue
4
Year of publication
1998
Pages
977 - 980
Database
ISI
SICI code
0035-8711(1998)300:4<977:TB2SIC>2.0.ZU;2-N
Abstract
We show how the second sequence seen lying above the main sequence in cluster colour-magnitude diagrams results from binaries with a large r ange of mass ratios and not just from those with equal masses. We conc lude that the presence of a densely populated second sequence, with on ly sparse filling in between it and the single star main sequence, doe s not necessarily imply that binary mass ratios are close to unity.