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2001MNRAS.324..305G - Mon. Not. R. Astron. Soc., 324, 305-312 (2001/June-3)
Starburst activity in a ROSAT narrow emission-line galaxy.
GUNN K.F., McHARDY I.M., ALMAINI O., SHANKS T., SUMNER T.J., MUXLOW T.W.B., EFSTATHIOU A., JONES L.R., CROOM S.M., MANNERS J.C., NEWSAM A.M., MASON K.O., SERJEANT S.B.G. and ROWAN-ROBINSON M.
Abstract (from CDS):
On positional grounds, the galaxy is a good candidate for the identification of R117, and the observed X-ray flux is very close to what would be expected from a starburst of the observed far-infrared and radio fluxes. Although an obscured high-redshift QSO cannot be entirely ruled out as contributing some fraction of the X-ray flux, we find no candidates to K=20.8 within the X-ray error box, and so conclude that R117_A is responsible for a large fraction, if not all, of the X-ray emission from R117.
Searches for indicators of an obscured AGN in R117_A have so far proven negative; deep spectropolarimetric observations show no signs of broad lines to a limit of 1per cent and, for the observed far-infrared and radio emission, we would expect 10 times greater X-ray flux if the overall emission were powered by an AGN. We therefore conclude that the X-ray emission from R117 is dominated by starburst emission from the galaxy R117_A.
Abstract Copyright: The Royal Astronomical Society
Journal keyword(s): galaxies: individual: R117_A - galaxies: starburst - X-rays: galaxies
CDS comments: Emission-line galaxy = NAME R117-A
Simbad objects: 6
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