Accretion and Outflow in the AGN and Starburst of NGC 5135

Details Accretion and Outflow in the AGN and Starburst of NGC 5135 Accretion and Outflow in the AGN and Starburst of NGC 5135

2003-10-22

arxiv.org/abs/astro-ph/0310669v1

Astrophys.J. 602 (2004) 135-147

Astronomy and Astrophysics

Astrophysics

To appear in ApJ; 13 pages, 12 figures

Scientific paper

10.1086/380836

Observations of the Seyfert 2 and starburst galaxy NGC 5135 with the Chandra X-ray Observatory demonstrate that both of these phenomena contribute significantly to its X-ray emission. We spatially isolate the active galactic nucleus (AGN) and demonstrate that it is entirely obscured by column density N_H > 10^{24} cm^{-2}, detectable in the Chandra bandpass only as a strongly reprocessed, weak continuum and a prominent iron K alpha emission line with equivalent width of 2.4 keV. Most of the soft X-ray emission, both near the AGN and extending over several-kpc spatial scales, is collisionally-excited plasma. We attribute this thermal emission to stellar processes. The AGN dominates the X-ray emission only at energies above 4 keV. In the spectral energy distribution that extends to far-infrared wavelengths, nearly all of the emergent luminosity below 10 keV is attributable to star formation, not the AGN.

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