High-resolution X-ray observations of M87 - Nucleus, jet and radio halo

Details High-resolution X-ray observations of M87 - Nucleus, jet and radio halo High-resolution X-ray observations of M87 - Nucleus, jet and radio halo

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...261...42s&link_type=abstract

Astrophysical Journal, Part 1, vol. 261, Oct. 1, 1982, p. 42-50.

Other

126

Elliptical Galaxies, Galactic Nuclei, Galactic Structure, Radio Galaxies, X Ray Sources, Active Galaxies, Bremsstrahlung, Compton Effect, Heao 2, Normal Density Functions, Synchrotron Radiation, X Ray Density Measurement, X Ray Scattering

Scientific paper

X-ray observations of M87 made using the Einstein Observatory HRI show the presence of four components. A broad, diffuse component associated with hot gas in the galaxy follows an approximate inverse power law; the pressure of the gas could be sufficient to confine the inner and outer radio lobes. A diffuse, asymmetrical X-ray distribution to the east and southwest appears similar to the radio morphology and is consistent with an inverse Compton model. An X-ray source centered on the nucleus of the galaxy is extended by 2-3 arcsec and may be due to thermal bremsstrahlung; a possible compact source of less than 10 to the 41st ergs/sec is weak compared with other active galaxies, and its implications for the presence of a massive black hole are discussed. A structure correlated with the radio-optical jet is also seen; the X-ray flux is consistent with an extrapolation of the optical synchrotron spectrum. The four components suggest that all three canonical astrophysical X-ray emission mechanisms are present in M87: thermal bremsstrahlung, inverse Compton scattering, and synchrotron radiation.

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