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2000MNRAS.312..689F - Mon. Not. R. Astron. Soc., 312, 689-697 (2000/March-2)
A multiwavelength view at the heart of the superwind in NGC253.
FORBES D.A., POLEHAMPTON E., STEVENS I.R., BRODIE J.P. and WARD M.J.
Abstract (from CDS):
We find that the majority of optical/IR/mm sources are young star clusters that trace out a ∼50pc ring that defines the inner edge of a cold gas torus. This reservoir of cold gas has probably been created by gas inflow from a larger scale bar and deposited at the inner Lindblad resonance. The family of compact radio sources lie interior to the starburst ring, and in general do not have optical or IR counterparts. They are mostly supernova remnants. The radio nucleus, which is probably an active galactic nucleus (AGN), lies near the centre of the ring. The X-ray emission from the nuclear source is extended in the ROSAT HRI detector indicating that not all of the X-ray emission can be associated with the AGN. The lack of X-ray variability and the flat radio spectrum of the nucleus, argue against an ultraluminous SN as the dominant energetic source at the galaxy core. The diffuse emission associated with the outflowing superwind is present in the central region on a size scale consistent with the idea of collimation by the gas torus.
Abstract Copyright: 2000, Royal Astronomical Society
Journal keyword(s): galaxies: active - galaxies: individual: NGC253 - galaxies: nuclei - galaxies: starburst - X-rays: galaxies
Nomenclature: Table 2: [FPS2000] Opt SS.ss-SS.s N=15. Table 3: [FPS2000] IR SS.sss-SS.ss N=17. Table 4: [FPS2000] Rad SS.sss-SS.ss N=16.
Simbad objects: 8
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