Evolution of a Luminous Hoyle-Lyttleton Accretor

Details Evolution of a Luminous Hoyle-Lyttleton Accretor Evolution of a Luminous Hoyle-Lyttleton Accretor

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999pasj...51..703f&link_type=abstract

Publications of the Astronomical Society of Japan, v.51, p.703.

Astronomy and Astrophysics

Astronomy

8

Accretion, Radiation Mechanisms, X-Rays: Individual (1E 17407-2942)

Scientific paper

We examine the evolution of a Hoyle-Lyttleton accretor, on which mass accretion takes place via the Hoyle-Lyttleton processes, while taking into account the luminosity of the accretor. We consider two cases: (i) a spherical accretor, where the accretor is a spherical radiating source, and (ii) a disk accretor, where the accretor is a disk radiating source. In the well-known case of the classical non-luminous accretor, the growth time depends on the mass, the gas density, and the relative velocity, although the evolution processes are enhanced due to dynamical friction; the evolution time is shortened roughly by a factor of the Coulomb logarithm. In the case of a luminous accretor, we found, the evolutionary picture is drastically changed. The mass of the spherical accretor grows exponentially, but the luminosity approaches the Eddington luminosity, where the evolution timescale is the Eddington timescale, t_E (= 4.53 x 108 eta yr, eta being the efficiency). The mass and the effective luminosity of the disk accretor, on the other hand, diverge to infinity within a finite time, which is shorter than the Eddington timescale by a factor of the Coulomb logarithm. We discuss applications to several astrophysical situations, including a slow mover in giant molecular clouds and a fast runner in Thorne-\. Zytkow objects.

Affiliated with

Also associated with

No associations

Rating

Evolution of a Luminous Hoyle-Lyttleton Accretor 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 Evolution of a Luminous Hoyle-Lyttleton Accretor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of a Luminous Hoyle-Lyttleton Accretor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1544263