Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-03-04
Astronomy and Astrophysics
Astrophysics
6 pages, LaTeX, 6 postscript figures included, to appear in MNRAS
Scientific paper
We present ROSAT observations of two luminous L~10^44 erg/s EMSS galaxies, MS1019+5139 and MS1209+3917, previously classified as 'cooling flow' galaxies. MS1019+5139 does not appear to be spatially extended (<13 kpc) while its spectrum is well fit by a power law with Gamma = 1.73 +0.19-0.18; X-ray variability on a timescale of ~ years is also clearly detected. MS1209+3917 shows no evidence of spatial extension (<50 kpc) but it shows variability, while its spectrum can be fit with thermal bremsstrahlung emission (kT=1.8 +0.9-0.4 keV) or a power law model (Gamma = 2.50 +0.44-0.42, but with excess photoelectric absorption above the Galactic value). All the above argue against thermal emission from a group of galaxies or a galaxy but in favour of an AGN (possibly BL Lac) interpretation. We conclude that no 'normal' galaxies with high X-ray luminosities have yet been detected in the EMSS survey that could be significant contributors to the X-ray background.
Blair A. J.
Georgantopoulos Ioannis
Stewart Gordon C.
No associations
LandOfFree
ROSAT observations of two 'cooling flow' EMSS Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with ROSAT observations of two 'cooling flow' EMSS Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ROSAT observations of two 'cooling flow' EMSS Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-435547