Effects of a hot intergalactic medium
One effect a hot intergalactic medium (IGM) would have would be to produce an isotropic X-ray background through thermal bremsstrahlung. Such a background was modeled including both relativistic electron-ion and electron-electron emission; the observed X-ray measurements could be fit with a current temperature of 10.2 keV and Omega (IGM) of 0.27, assuming that the IGM was instantaneously heated at a redshift of 5 and cools by relativistic adiabatic expansion and Compton cooling. Such a hot IGM would also distort the cosmic microwave background spectrum by inverse Compton scattering off relativistic electrons. This distortion was modeled using the relativistic treatment. When including the recent data of Matsumoto et al., an undistorted radiation temperature of 2.86 K and an Omega (IGM) of 0.41 was found. 31 refs.
- Research Organization:
- California Univ., Los Angeles (USA)
- OSTI ID:
- 5851675
- Journal Information:
- Astrophys. J.; (United States), Vol. 339
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
INTERGALACTIC SPACE
UNIVERSE
X RADIATION
BACKGROUND RADIATION
BREMSSTRAHLUNG
COMPTON EFFECT
COOLING
ELECTRON BEAMS
GALACTIC EVOLUTION
HEATING
ISOTROPY
RED SHIFT
RELATIVISTIC RANGE
RELICT RADIATION
X-RAY SPECTRA
BASIC INTERACTIONS
BEAMS
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELECTROMAGNETIC RADIATION
ENERGY RANGE
INTERACTIONS
IONIZING RADIATIONS
LEPTON BEAMS
MICROWAVE RADIATION
PARTICLE BEAMS
RADIATIONS
SCATTERING
SPACE
SPECTRA
640106* - Astrophysics & Cosmology- Cosmology