The Evolution of Emission Lines in Massive Early Type Red Galaxies

Details The Evolution of Emission Lines in Massive Early Type Red Galaxies The Evolution of Emission Lines in Massive Early Type Red Galaxies

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21732506k&link_type=abstract

American Astronomical Society, AAS Meeting #217, #325.06; Bulletin of the American Astronomical Society, Vol. 43, 2011

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Massive early type red galaxies (MERGs) are typically thought to be "red and dead": in particular devoid of gas ionized by star formation. Contrary to this view, MERGs do show gas emission. In this talk I will present the evolution in the luminosity density of the forbidden emission line [O II], a common star formation rate tracer. Based on this evolution rate I will comment on possible ionizing sources for the gas. Without further data, however, it is not clear if the ionization source is star formation, AGN activity, or some other mechanism.

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