Cool stellar populations in E/S0 galaxies and a possible outburst in M87

Details Cool stellar populations in E/S0 galaxies and a possible outburst in M87 Cool stellar populations in E/S0 galaxies and a possible outburst in M87

Jan 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...203l...1o&link_type=abstract

Astrophysical Journal, vol. 203, Jan. 1, 1976, pt. 2, p. L1-L4.

Astronomy and Astrophysics

Astronomy

11

Galactic Nuclei, Galactic Structure, Infrared Astronomy, M Stars, Star Distribution, Supernovae, Asymptotic Giant Branch Stars, Elliptical Galaxies, Giant Stars, Luminous Intensity, Radio Sources (Astronomy), Spiral Galaxies

Scientific paper

The paper discusses a scanner survey of the 0.7-1.1 micron energy distributions of the nuclei of E/S0 galaxies ranging over a factor of 100 in intrinsic luminosity. There is a mild (color, absolute magnitude) correlation. The strength of the Ca II + TiO absorption feature at 8542 A appears to reach a maximum near an absolute visible magnitude of about -20.5, which may be due to a maximum in the density of low-mass stars in short-lived phases near the tip of the asymptotic giant branch. The color of the nucleus of M87 is anomalously blue for its luminosity, possibly indicating that a nonthermal or supernova outburst has recently occurred.

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