Accretion onto pregalactic black holes

Journal Article · Thu Sep 01 04:00:00 EDT 1977 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/155499· OSTI ID:7290903

Ipser, J R; Price, R H

If, as has recently been suggested, a large part of the mass in our Galaxy is in the form of massive (M=10/sup 5/ M/sub(/sub 5/) M/sub sun5/ M/sub sun)/black holes, a significant number of these objects should be moving supersonically through the disk of the Galaxy and accreting interstellar gas at a rate > or approx. =10/sup 17/ M/sub(/sub 5/)/sup 2/g s/sup -1/. The nearest such object should be approx.200 M/sub(/sub 5/) /sup 1/3/pc from the Sun. We find that most of these objects would accrete more or less spherically (no disk formation) and would radiate approx.10/sup 37/ M/sub(/sub 5/)/sup 2/ergs s/sup -1/ at wavelengths approx.10 M/sub(/sub 5/)/sup 13/8/..mu..m. A small fraction (approx.0.2%) would have a low enough Mach number to form accretion disks with a luminosity of approx.10/sup 39/ M/sub(/sub 5/)/sup 2/ergs s/sup -1/ at wavelengths approx.100 M/sub(/sub 5/)/sup 1/2/A. A larger fraction (> or approx. =4%) would form accretion disks, due to inhomogenous accretion, and would radiate > or approx. =10/sup 37/ M/sub(/sub 5/)/sup 2/ergs s/sup -1/ primarily at visible wavelengths.It would appear that observations constrain the local density of such objects, at least for 0.39 or approx. =M/sub(/sub 5/)9 or approx. =30, to be too small by a factor > or approx. =100 to provide a galactic halo that would explain the suggested linear mass-radius relation for spiral galaxies, stabilize galactic disks, or close the Universe.

• Research Organization: Department of Astronomy and Astrophysics, University of Chicago
• OSTI ID: 7290903
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 216:2; ISSN ASJOA
• 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
BLACK HOLES
BREMSSTRAHLUNG
COSMIC GASES
COSMIC RADIATION
ELECTROMAGNETIC RADIATION
ENERGY SPECTRA
FLUIDS
GALAXIES
GASES
INTERSTELLAR SPACE
IONIZING RADIATIONS
LUMINOSITY
MATHEMATICAL MODELS
MILKY WAY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
SHOCK WAVES
SPACE
SPECTRA
STAR ACCRETION
STAR EVOLUTION
STAR MODELS
SYNCHROTRON RADIATION
THERMODYNAMICS