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

Singh, K. P. ; Bhat, P. N. ; Prabhu, T. P. ; Kembhavi, A. K. (1995) Distribution of ionized gas in X-ray bright early-type galaxies Astronomy & Astrophysics, 302 . p. 658. ISSN 0004-6361

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Official URL: http://adsabs.harvard.edu/abs/1995A&A...302..658S


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 ~105 M 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.

Item Type:Article
Source:Copyright of this article belongs to EDP Sciences.
Keywords:Galaxies: Elliptical and Lenticular; Cooling Flows; ISM; Interactions
ID Code:59024
Deposited On:03 Sep 2011 12:10
Last Modified:18 May 2016 09:44

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