The nonthermal nucleus of M87

Details The nonthermal nucleus of M87 The nonthermal nucleus of M87

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...388l...9k&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 388, March 20, 1992, p. L9-L11.

Astronomy and Astrophysics

Astronomy

12

Elliptical Galaxies, Galactic Nuclei, Nonthermal Radiation, Absorption Spectra, Astronomical Spectroscopy, Black Holes (Astronomy), Emission Spectra, Radio Jets (Astronomy), Virgo Galactic Cluster

Scientific paper

A spectrum along the jet of M87 has been obtained in effective seeing with the Canadian-France-Hawaii Telescope. Near 5175 A (Mg I b), the spectrum of the nucleus shows both emission and stellar absorption lines. However, when the spectrum of the underlying core of M87 is subtracted, the stellar absorption lines disappear, leaving a blue continuum and the broad emission line forbidden N I 5199 A. At visual wavelengths, the nucleus is essentially completely nonthermal; it is not a cluster of stars. This confirms results of Dressler and Richstone (1990).

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