ASCA Discoveries of X-Ray Emissions from Radio Lobes

Details ASCA Discoveries of X-Ray Emissions from Radio Lobes ASCA Discoveries of X-Ray Emissions from Radio Lobes

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000asthe..93..487t&link_type=abstract

The Astronomical Herald (ISSN 0374-2466), Vol. 93, No. 9, p. 487 - 495 (2000)

Astronomy and Astrophysics

Astronomy

Scientific paper

An introduction is presented to recent ASCA discoveries of hard X-ray emissions from lobes of radio galaxies. The X-ray astronomy satellite ASCA has detected the hard X-rays from a fair number of radio lobes utilizing the excellent sensitivity in hard X-ray. Due to the good capabilility in spectroscopy, ASCA revealed the diffuse hard X-rays are produced via inverse-Comptonization of the cosmic microwave photons by the relativistic electrons in the lobes. Comparison of the newly measured inverse-Compton X-rays with the synchrotron radiation from the lobes resolves energy densities and spatial distributions of electrons and magnetic fields in the lobes. Recent arguments on the energy balance and on derived magnetic field structure are also presented.

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