Soft X-ray Spectra of Seyfert 2 Galaxies

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dc.creatorSako, Masao
dc.creatorKinkhabwala, Ali
dc.creatorKahn, Steven M.
dc.creatorBehar, Ehud
dc.creatorPaerels, Frits
dc.creatorGu, Ming Feng
dc.creatorBrinkman, Albert C.
dc.creatorKaastra, Jelle S.
dc.creatorLiedahl, Duane A.
dc.date2002-07-18
dc.date.accessioned2026-07-07T02:04:22Z
dc.date.available2026-07-07T02:04:22Z
dc.descriptionHigh resolution spectroscopic observations of Seyfert galaxies with Chandra and XMM-Newton allows us to study the detailed ionization and thermal structures of the X-ray absorbing/emitting material in the circumnuclear environment. The vast improvement in the spectral resolving power by more than an order of magnitude enables us, for the first time, to unambiguously distinguish the dominant line emission mechanisms and to measure its dynamical properties as well. The X-ray band harbors spectral transitions from a wide range of ionization states, including valence-shell transitions in K-shell and L-shell ions from most cosmically abundant elements, as well as inner-shell transitions of iron and other mid-Z elements, which can be probed through absorption measurements. The X-ray spectrum, therefore, provides simultaneous velocity and column density constraints of highly ionized to only slightly ionized gas harbored in many of these systems. We summarize recent results that have emerged from observations of Seyfert 2 galaxies with the grating spectrometers onboard Chandra and XMM-Newton. We give particular emphasis to an empirical physical model that we have developed based on the observed spectra, and how it can be used for comparative studies with Seyfert 1 galaxies to test the AGN unification scenarios.
dc.description8 pages, 7 figures. Invited review. To appear in the proceedings of the workshop "X-ray spectroscopy of AGN with Chandra and XMM-Newton", eds., Th. Boller, S. Komossa, S. Kahn, and H. Kunieda
dc.identifierhttps://arxiv.org/abs/astro-ph/0207404
dc.identifierhttp://arxiv.org/abs/astro-ph/0207404
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/4731
dc.subjectAstrophysics
dc.titleSoft X-ray Spectra of Seyfert 2 Galaxies
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