LINER-like emission in red galaxies: evolutionary phase or recurring phenomenon?

Details LINER-like emission in red galaxies: evolutionary phase or recurring phenomenon? LINER-like emission in red galaxies: evolutionary phase or recurring phenomenon?

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008iaus..245..181g&link_type=abstract

Formation and Evolution of Galaxy Bulges, Proceedings of the International Astronomical Union, IAU Symposium, Volume 245, p. 181

Astronomy and Astrophysics

Astronomy

Galaxies: Stellar Content, Galaxies: Active, Galaxies: Bulges

Scientific paper

We present recent results showing that a large fraction of red sequence galaxies contain ionized gas with LINER-like optical emission line ratios. This emission is more frequently found in galaxies with lower central velocity dispersion (σ) and these galaxies typically have younger mean ages than galaxies at the same σ which do not host emission. We suggest that the presence of LINER-like emission may be determined by the quantity of interstellar material in these galaxies and may be associated with the recent accretion of a gas-rich satellite galaxy or alternatively with stellar mass loss that declines as the galaxy stellar population ages.

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