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Compton-Thick or Thin? Classifying NGC 5347

23 Jan 2020, 14:19 UTC
Compton-Thick or Thin? Classifying NGC 5347
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Title: A Hard Look at NGC 5347: Revealing a Nearby Compton-Thick AGN Authors: E. S. Kammoun, J. M. Miller, A. Zoghbi, K. Oh, M. Koss, R. F. Mushotzky, L. W. Brenneman, W. N. Brandt, D. Proga, A. M. Lohfink, J. S. Kaastra, D. Barret, E. Behar, and D. Stern First Author’s Institution: Department of Astronomy, University of Michigan, Ann Arbor, MIStatus: Published in the Astrophysical Journal, open access on arXivBlack holes are some of the most interesting and extreme objects in the universe. Fortunately, we think that almost every galaxy in the universe has a supermassive black hole (SMBH) at its center, giving many opportunities to study their environments. As matter falls towards a black hole, it forms an accretion disk — a flattened disk of gas and other debris — outside of its event horizon. This accretion disk is hot and emits radiation, even though we can’t see any light from the black hole itself. When SMBHs at the centers (or nuclei) of galaxies are actively accreting mass and emitting a huge amount of energy, we call them Active Galactic Nuclei (AGN). The different structural components of AGN, shown in Figure 1, emit radiation in a wide range of ...

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