The anomalous Cepheids in dwarf spheroidal galaxies as binary systems

Details The anomalous Cepheids in dwarf spheroidal galaxies as binary systems The anomalous Cepheids in dwarf spheroidal galaxies as binary systems

Apr 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....56..369r&link_type=abstract

Astronomy and Astrophysics, vol. 56, no. 3, Apr. 1977, p. 369-376.

Astronomy and Astrophysics

Astrophysics

78

Binary Stars, Cepheid Variables, Galactic Structure, Globular Clusters, Mass Transfer, Stellar Mass, Red Giant Stars, Spheroids, Stellar Evolution, Stellar Systems

Scientific paper

The possibility that mass transfer within binary systems can explain the anomalous Cepheids in dwarf spheroidal galaxies has been explored and found to be consistent with available observational data. It is shown that there exists a fairly large range of initial separations for which mass transfer can occur during the red-giant phase of the primary but not during the subsequent red-giant phase of the accreted secondary. It is also shown that binaries with the appropriate separation to produce anomalous Cepheids can survive for about 10 billion years only in low-density stellar systems such as dwarf spheroidal galaxies and a few low-density galactic globular clusters. Dynamical encounters within the dense cores of most globular clusters will in fact lead to a shrinkage of the binary orbits below the required range and, perhaps in extreme cases, to a coalescence of the two components. A possible observational test of this suggestion is provided by the predicted existence of blue stragglers in all globular clusters which have a time scale for the coalescence of binary systems longer than approximately 10 billion years.

Affiliated with

Also associated with

No associations

Rating

The anomalous Cepheids in dwarf spheroidal galaxies as binary systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The anomalous Cepheids in dwarf spheroidal galaxies as binary systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The anomalous Cepheids in dwarf spheroidal galaxies as binary systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1616414