Nearby early-type galaxies with ionized gas.IV. Origin and powering mechanism of the ionized gas

Details Nearby early-type galaxies with ionized gas.IV. Origin and powering mechanism of the ionized gas Nearby early-type galaxies with ionized gas.IV. Origin and powering mechanism of the ionized gas

2010-04-09

arxiv.org/abs/1004.1647v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

A&A accepted

Scientific paper

[ABRIDGED] With the aim of constraining the source of excitation and the origin of the ionized gas in early-type galaxies (ETGs), we analyzed optical spectra of a sample of 65 ETGs mostly located in low density environments. Optical emission lines are detected in 89% of the sample. The incidence and strength of emission do not correlate either with the E/S0 classification, or with the fast/slow rotator classification. Comparing the nuclear r

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