X-ray-selected normal galaxies (Georgantopoulos+, 2005)

Details X-ray-selected normal galaxies (Georgantopoulos+, 2005) X-ray-selected normal galaxies (Georgantopoulos+, 2005)

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ycat..73600782g&link_type=abstract

VizieR On-line Data Catalog: J/MNRAS/360/782. Originally published in: 2005MNRAS.360..782G

Physics

X-Ray Sources, Galaxies: Optical, Redshifts

Scientific paper

In this paper we estimate the local (z<0.22) X-ray luminosity function of 'normal' galaxies derived from the XMM-Newton Needles in the Haystack Survey. This is an on-going project that aims to identify X-ray-selected normal galaxies (i.e. non-AGN dominated) in the local Universe. We are using a total of 70 XMM-Newton fields covering an area of 11deg2 which overlap with the Sloan Digital Sky Survey Data Release 2. Normal galaxies are selected on the basis of their resolved optical light profile, their low X-ray-to-optical flux ratio [log(fx/fo)<-2] and soft X-ray colours. We find a total of 28 candidate normal galaxies to the 0.58keV band flux limit of 2-10-15erg/cm2/s. Optical spectra are available for most sources in our sample (82 per cent). These provide additional evidence that our sources are bona fide normal galaxies with X-ray emission coming from diffuse hot gas emission and/or X-ray binaries rather than a supermassive black hole.
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