Case A evolution of massive close binaries: formation of contact systems and possible reversal of the supernova order

Details Case A evolution of massive close binaries: formation of contact systems and possible reversal of the supernova order Case A evolution of massive close binaries: formation of contact systems and possible reversal of the supernova order

Oct 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...290..119p&link_type=abstract

Astronomy and Astrophysics 290, 119-128 (1994)

Astronomy and Astrophysics

Astrophysics

38

Stars: Close Binaries, Stars: Evolution, Stars: Supernovae, Supernova Remnants: Crab Nebula

Scientific paper

Evolutionary calculations are presented of massive close binaries in which the evolution of both components is taken into account. The calculations were performed with Eggleton's stellar evolution code for a variety of close (case A) binaries plus a few wider (case B) systems, with initial primary masses between 8 and 16Msun_. For the systems with 16Msun_ primaries the parameter space of initial mass ratio and orbital period is explored for the formation of contact binaries. It is found that systems with initial mass ratios q_0_<~0.7 evolve into contact during the first, rapid mass transfer phase, while systems with larger q_0_ but initial orbital period P_0_<~1.6d reach contact later on, during the slow mass transfer phase. For the wider case A systems that avoid contact altogether, there is a limited range in initial orbital period and mass ratio where it is possible that the original secondary star reaches the end of its evolution before the primary. In particular, in massive systems the secondary may undergo a supernova explosion before the primary, leading to the ejection of this primary (a helium star) from the system. We suggest that this type of evolution may be relevant to the formation of the Crab nebula, which is helium-rich and rather far from the Galactic plane. For case B systems we find that systems with larger orbital period are more likely to come into contact, even if the primary still has a radiative envelope.

Affiliated with

Also associated with

No associations

Rating

Case A evolution of massive close binaries: formation of contact systems and possible reversal of the supernova order 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 Case A evolution of massive close binaries: formation of contact systems and possible reversal of the supernova order, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Case A evolution of massive close binaries: formation of contact systems and possible reversal of the supernova order will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1067318