Merger Sites of Double Neutron Stars and their Host Galaxies

Details Merger Sites of Double Neutron Stars and their Host Galaxies Merger Sites of Double Neutron Stars and their Host Galaxies

2002-04-24

arxiv.org/abs/astro-ph/0204416v1

Astronomy and Astrophysics

Astrophysics

12 pages, 3 figures, ApJ Letters 2002, accepted

Scientific paper

10.1086/341365

Using the StarTrack population synthesis code we analyze the formation channels possibly available to double neutron star binaries and find that they can be richer than previously thought. We identify a group of short lived, tight binaries, which do not live long enough to escape their host galaxies, despite their large center-of-mass velocities. We present our most recent results on all possible evolutionary paths leading to the formation of double neutron stars, calculate their coalescence rates, and also revisit the question of the distribution of merger sites around host galaxies. For a wide variety of binary evolution models and galaxy potentials, we find that most of neutron star mergers take place within galaxies. Our results stem from allowing for radial and common envelope evolution of helium-rich stars (testable in the future with detailed stellar-structure and hydrodynamic calculations) and indicate that double neutron star binaries may not be excluded as Gamma-Ray Burst (GRB) progenitors solely on the basis of their spatial distribution around host galaxies. We also find, in contrast to Bethe & Brown (1998), that in a significant fraction of common envelope (CE) phases neutron stars do not accrete enough material to become black holes, and thus the channels involving CEs are still open for the formation of double neutron stars.

Affiliated with

Also associated with

No associations

Rating

Merger Sites of Double Neutron Stars and their Host Galaxies 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 Merger Sites of Double Neutron Stars and their Host Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Merger Sites of Double Neutron Stars and their Host Galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-719