Spherically symmetric near-critical accretion onto neutron stars

Journal Article · Fri Jun 01 04:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168863· OSTI ID:6934241

Miller, G S ^[1]

---

1. Illinois Univ., Urbana (USA) Los Alamos National Laboratory, NM (USA)

Numerical and approximate analytic solutions for time-independent, spherically symmetric, radiation pressure-dominated accretion flows are presented. For flows with luminosities at infinity, L-infinity, sufficiently close to the Eddington limit L-crit, the flow velocity profile is qualitatively different from the modified free-fall profile v(r) = (1 - L-infinity/L-crit)exp 1/2 (2GM/r)exp 1/2. Advective contributions to the comoving radiation flux decelerate the flow within a criical radius, and, in this settling region, the velocity of the flow decreases linearly with decreasing radius. 14 refs.

• OSTI ID: 6934241
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 356; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATION
ANALYTICAL SOLUTION
ASTROPHYSICS
LUMINOSITY
NEUTRON STARS
NUMERICAL SOLUTION
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATION PRESSURE
STAR ACCRETION
STAR EVOLUTION
STARS