X-ray observations to detect hot coronae around galaxies

Journal Article · Wed Dec 15 04:00:00 EST 1982 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/160527· OSTI ID:6150834

Bregman, J N; Glassgold, A E

X-ray observations were made of two nearby edge-on spiral galaxies with the Imaging Proportional Counter (IPC) on the Einstein Observatory in an effort to detect hot (10/sup 6/ K), gaseous galactic coronae. No diffuse emission from galactic coronae was detected. Upper limits to diffuse emission (0.3--2.9 keV) are 1 x 10/sup 39/ ergs s/sup -1/ (NGC 3628) and 2 x 10/sup 38/ ergs s/sup -1/ (NGC 4244). The measurements indicate that less than 10/sup -3/ of the energy supplied by supernovae in these galaxies appears as soft X-rays. The energy from supernovae may be radiated away by cool gas (T<6 x 10/sup 5/ K) whose emission is undetectable by the Einstein Observatory, or the energy may be carried away by a hot wind (10/sup 7/ K) which radiates inefficiently. Serendipitous X-ray sources from the two IPC fields are listed.

• Research Organization: Physics Department, New York University
• OSTI ID: 6150834
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 263:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics &amp; Cosmology-- Quasi-Stellar
Radio
&amp; X-Ray Sources-- (-1987)
640105 -- Astrophysics &amp; Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC GASES
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
ERUPTIVE VARIABLE STARS
FLUIDS
GALAXIES
GASES
MORPHOLOGY
SPECTRA
STARS
SUPERNOVAE
VARIABLE STARS
X-RAY SPECTRA