Ariel 5 observations of the X-ray spectrum of the Perseus Cluster

Details Ariel 5 observations of the X-ray spectrum of the Perseus Cluster Ariel 5 observations of the X-ray spectrum of the Perseus Cluster

May 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976mnras.175p..29m&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 175, May 1976, p. 29P-34P.

Astronomy and Astrophysics

Astronomy

128

Astronomical Spectroscopy, Galactic Clusters, High Temperature Plasmas, Satellite Observation, X Ray Spectra, Ariel Satellites, Bremsstrahlung, Continuous Radiation, Energy Spectra, Forbidden Transitions, Gravitational Fields

Scientific paper

An X-ray spectrum of the Perseus Cluster in the energy range 1.3-16 keV has been obtained with the MSSL collimated proportional counter on Ariel 5. An emission feature has been detected at about 7 keV of strength about 0.0035 photon per sq cm per sec. The existence of this feature, which is due to Fe XXV and Fe XXVI transitions, provides strong evidence for the presence of hot plasma in the cluster. In addition the overall spectrum is well described by the bremsstrahlung emitted from an adiabatic hydrostatic atmosphere of hot gas in the gravitational potential well of the cluster.

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