Distribution of ionized gas in X-ray bright early-type galaxies.

Details Distribution of ionized gas in X-ray bright early-type galaxies. Distribution of ionized gas in X-ray bright early-type galaxies.

Oct 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...302..658s&link_type=abstract

Astronomy and Astrophysics, v.302, p.658

Astronomy and Astrophysics

Astrophysics

11

Galaxies: Elliptical And Lenticular, Cooling Flows, Ism, Interactions

Scientific paper

We report imaging observations of Hα+[N II] nebulosities in seven early type galaxies viz., NGC 1399, NGC 1600, NGC 2563, NGC 4203, NGC 4636, NGC 4753 and NGC 5044. These are primarily X-ray bright galaxies which are the dominant members of nearby groups. Many of these galaxies have X-ray cooling flows. The results are based on CCD surface photometry carried out using a broad-band filter R, and a narrow band filter appropriate for the red-shifted Hα+[N II] emission. We present the integrated Hα luminosities in these galaxies and examine various emission mechanisms. The observed Hα luminosity implies a mass of ~10^5^Msun_ in the ionized gas. We suggest that photo-ionization by young stars is a viable emission mechanism and star formation due to accretion events or mergers may be common in these galaxies.

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