Session 2HE: Accretion and Photoionized Plasmas
11:15 AM–2:50 PM, Friday, April 11, 2008
Hyatt Regency St. Louis Riverfront (formerly Adam's Mark Hotel), Room: Promenade F
Sponsoring Units:
HEDP HEDLA
Chair: Roberto Mancini, University of Nevada-Reno
Abstract ID: BAPS.2008.APR.2HE.2
Abstract: 2HE.00002 : Current Challenges of Astrophysical Photoionized Plasmas
11:40 AM–12:05 PM
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Abstract 
Author:
Michael Witthoeft
(NASA/GSFC)
Photoioniation and photoexcitation has been known to be important in astrophysical plasmas since the early study of emission line nebulae, and the study of optical and UV emission lines is a classical subject. Recently, this has broadened to include emission in other wavelength bands. In the X-ray band, Chandra and XMM-Newton have revealed rich spectra from active galaxies and compact binaries, and this has motivated new efforts at modeling these plasmas. This has led to insights about a component of the gas in these systems which had been previously unknown, observationally, and which has implications for our understanding of the global mass budget. In this talk I will review the observational data on these plasmas, and discuss some recent results on modeling.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.APR.2HE.2