Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.257p...7c&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 257, no. 1, July 1, 1992, p. 7P-11P.
Physics
11
Elliptical Galaxies, Galactic Nuclei, Absorption Spectra, Astronomical Spectroscopy, Emission Spectra, Point Sources, Spatial Resolution, Stellar Physics, Virgo Galactic Cluster
Scientific paper
Spectra of the nucleus of M87 are presented, taken at the highest spatial resolution available to ground-based observations. The observations confirm the conclusion of the majority of recent work on this galaxy, that the light from the central point source consists of a flat, probably nonthermal continuum, and a number of strong emission lines characteristic of a LINER. In the continuum light, there are narrow absorption lines of Ca II H and K, quite clearly detected at the redshift of M87 and marginally detected at zero redshift. Thus, cool interstellar material is detected in the central regions of M87. It is not possible to measure directly the stellar velocity dispersion in the nucleus of M87, because of contamination by continuum light, emission lines, and interstellar absorption lines. However, the velocity dispersion of the stars between 1 and 2.5 arcsec from the nucleus is 380 +/- 30 km/s, and there is no evidence that the dispersion in the stellar component in the nucleus is any higher.
Carter David
Jenkins Charles R.
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