Spatially resolved spectroscopy of NGC 4945
Abstract
We present the imaging and spectroscopic analysis of the combined Chandra ACIS-S observations (420 ks long) of one the nearest Compton-thick Seyfert 2 galaxies, NGC 4945 (D=3.7 Mpc, 1 arcsec=18 pc). We performed a spatially-resolved spectroscopy of the circumnuclear environment of the source, picturing the innermost 200 parsecs around the highly absorbed nucleus. While previous studies revealed an extended Iron Ka emission line with the associated reflection continuum, we push this analysis even further, by revealing a spatially variable EW of the neutral iron line and a clump of gas with an intense Fe XXV Ka emission, at a distance d=45 pc from the nucleus. Our findings are in agreement with a clumpy environment and against a homogeneous, monolithic Compton-thick absorber.
- Publication:
-
The X-ray Universe 2017
- Pub Date:
- October 2017
- Bibcode:
- 2017xru..conf..140M