Can eccentric binary millisecond pulsars form by accretion induced collapse of white dwarfs?

Details Can eccentric binary millisecond pulsars form by accretion induced collapse of white dwarfs? Can eccentric binary millisecond pulsars form by accretion induced collapse of white dwarfs?

2010-08-12

arxiv.org/abs/1008.2130v2

Mon. Not. R. Astron. Soc. (2011)410, 1441-1446

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

7 pages, 2 figures, accepted for publication in MNRAS

Scientific paper

Binary radio pulsars are generally believed to have been spun up to millisecond periods (i.e. recycling) via mass accretion from their donor stars, and they are the descendants of neutron star low-mass X-ray binaries. However, some studies indicate that the formation of pulsars from the accretion-induced collapse (AIC) of accreting white dwarfs (WDs) cannot be excluded. In this work, we use a population synthesis code to examine if the AIC channel can produce eccentric binary millisecond pulsars (BMSPs) in the Galaxy. Our simulated results indicate that, only when the natal MSPs receive a relatively strong kick ($\ga100\rm km\,s^{-1}$), can the AIC channel produce $\sim 10-180$ eccentric ($e>0.1$) BMSPs in the Galaxy, most of which are accompanied by a Helium star. Such a kick seems to be highly unlikely in the conventional AIC process, hence the probability of forming eccentric BMSPs via the AIC channel can be ruled out. Even if a high kick is allowed, the AIC channel cannot produce eccentric BMSPs with an orbital period of $\ga 20$ days. Therefore, we propose that the peculiar BMSP PSR J1903+0327 cannot be formed by the AIC channel. However, the AIC evolutionary channel may produce some fraction of isolated millisecond pulsars, and even sub-millisecond pulsars if they really exist.

Affiliated with

Also associated with

No associations

Rating

Can eccentric binary millisecond pulsars form by accretion induced collapse of white dwarfs? 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 Can eccentric binary millisecond pulsars form by accretion induced collapse of white dwarfs?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Can eccentric binary millisecond pulsars form by accretion induced collapse of white dwarfs? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-587397