X-ray coronae around galaxies

Journal Article · Thu May 01 04:00:00 EDT 1980 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/157915· OSTI ID:5126929

Bregman, J N

We numerically simulated the dynamics of hot coronal gas in two models in order to evaluate the X-ray emission properties of coronae. Nearly all of the detectable X-ray emission occurs below 1 keV. For the 0.53--0.87 keV band, the X-ray scale height is one-fifth to one-third the density scale height, if the temperature at the base of the corona T/sub 0/>1.5 x 10/sup 6/ K; nearly all the X-ray emission is provided by 10--20% of the coronal mass. In some disk-bulge galaxies, the extended X-ray emission will reach a maximum outside the galactic center. For an edge-on galaxy, absorption by neutral gas may render the disk less luminous than the corona. Edge-on spiral galaxies as far as the Virgo cluster may be detected with the Imaging Proportional Counter on the Einstein telescope.

• Research Organization: Astronomy Department, Columbia University
• OSTI ID: 5126929
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 237:3; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COOLING
COSMIC GASES
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
FLUID MECHANICS
FLUIDS
GALAXIES
GASES
HYDRODYNAMICS
INTERSTELLAR SPACE
MASS
MECHANICS
MILKY WAY
RADIATIVE COOLING
SPACE
SPECTRA
X-RAY SPECTRA