Compton-Thick Active Galactic NucleiPublication overview
The Astrophysical Journal · 2023
Deep Chandra Observations of NGC 5728 · Paper I
ApJ 950, 143 (2023)
Scientific summary
Deep Chandra/ACIS-S imaging spectroscopy maps the spatial and energy-dependent X-ray emission around the obscured nucleus of NGC 5728. The analysis compares bicone and cross-cone regions and models their spectra to distinguish photoionized emission from collisionally ionized plasma.
Key results
The diffuse X-ray emission is more extended at lower energies, reaching about 2 kpc along the bicone and 1.4 kpc in the cross-cone direction.
The cross-cone-to-bicone photon ratio is about 16% below 3 keV and decreases to about 5% between 3 and 6 keV.
The nuclear spectrum contains low- and high-ionization photoionized phases, while the bicone and cross-cone spectra require contributions from both photoionized and collisionally ionized gas.
Connected research series
Three studies use the deep Chandra observations of NGC 5728 to examine the extended X-ray emission, the spatially resolved Fe K complex, and the multiphase circumnuclear medium.
Maps the bicone and cross-cone emission and constrains the contributions of photoionized and thermal plasma.
Resolves extended red and blue Fe K components and examines a possible high-velocity outflow interpretation.
Compares the X-ray emission with cold molecular gas, warm ionized gas, dust, and the circumnuclear star-forming ring.
