On galactic rotation and the intergalactic medium

Details On galactic rotation and the intergalactic medium On galactic rotation and the intergalactic medium

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...199..555c&link_type=abstract

Astrophysical Journal, vol. 199, Aug. 1, 1975, pt. 1, p. 555-557. Research supported by the Max-Planck-Institut für Physik und

Astronomy and Astrophysics

Astronomy

1

Background Radiation, Cosmic Gases, Galactic Rotation, High Temperature Gases, Intergalactic Media, X Ray Astronomy, Astronomical Models, Cosmology, Diffuse Radiation, Isotropic Media

Scientific paper

The observed spectrum of the isotropic diffuse X-ray background has often been invoked to infer the possible existence of a hot intergalactic medium at a density of the order of that required for closure of the Universe. The effect of such a hot isotropic gas on the rotation of galaxies is considered with the coupling between the intergalactic medium and the galaxies being provided by galactic magnetic fields. The calculation provides the basis for an indirect observational test which bears on the existence of the hot intergalactic medium. It is noted that the basic physics involved should also pertain to variable X-ray stars emitting by mass accretion and, perhaps, to the Coma cluster of galaxies.

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