D
D. Michael Crenshaw
Researcher at Georgia State University
Publications - 29
Citations - 2088
D. Michael Crenshaw is an academic researcher from Georgia State University. The author has contributed to research in topics: Galaxy & Active galactic nucleus. The author has an hindex of 21, co-authored 29 publications receiving 1930 citations. Previous affiliations of D. Michael Crenshaw include Uppsala University & Goddard Space Flight Center.
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Journal ArticleDOI
The ionized gas and nuclear environment in NGC 3783. I. Time-averaged 900 kilosecond Chandra grating spectroscopy
Shai Kaspi,Shai Kaspi,W. N. Brandt,Ian M. George,Ian M. George,Hagai Netzer,D. Michael Crenshaw,Jack R. Gabel,Jack R. Gabel,Fred Hamann,Mary Elizabeth Kaiser,Anuradha Koratkar,Steven B. Kraemer,Steven B. Kraemer,Gerard A. Kriss,Gerard A. Kriss,Smita Mathur,Richard Mushotzky,K. Nandra,K. Nandra,Bradley M. Peterson,Joseph C. Shields,T. J. Turner,T. J. Turner,Wei Zheng +24 more
TL;DR: In this paper, the authors present results from a 900 ks exposure of NGC 3783 with the High-Energy Transmission Grating Spectrometer on board the Chandra X-Ray Observatory.
Journal ArticleDOI
BAT AGN Spectroscopic Survey. I. Spectral Measurements, Derived Quantities, and AGN Demographics
Michael Koss,Benny Trakhtenbrot,Claudio Ricci,Claudio Ricci,Isabella Lamperti,Kyuseok Oh,Simon Berney,Kevin Schawinski,Mislav Baloković,L. Baronchelli,D. Michael Crenshaw,Travis C. Fischer,Neil Gehrels,Fiona A. Harrison,Yasuhiro Hashimoto,Drew Hogg,Kohei Ichikawa,N. Masetti,Richard F. Mushotzky,Lia F. Sartori,Daniel Stern,Ezequiel Treister,Yoshihiro Ueda,Sylvain Veilleux,Lisa M. Winter +24 more
TL;DR: The first catalog and data release of the Swift-BAT AGN Spectroscopic Survey is presented in this article, which includes redshift determination, absorption and emission line measurements, and black hole mass and accretion rate estimates for the majority of obscured and unobscured AGNs.
Journal ArticleDOI
The Ionized Gas and Nuclear Environment in NGC 3783. IV. Variability and Modeling of the 900 Kilosecond Chandra Spectrum
Hagai Netzer,Shai Kaspi,Ehud Behar,W. N. Brandt,Doron Chelouche,Ian M. George,Ian M. George,D. Michael Crenshaw,Jack R. Gabel,Fred Hamann,Steven B. Kraemer,Gerard A. Kriss,Gerard A. Kriss,Kirpal Nandra,Bradley M. Peterson,Joseph C. Shields,T. J. Turner,T. J. Turner +17 more
TL;DR: A detailed spectral analysis of the data obtained from NGC 3783 during the period 2000-2001 using Chandra was presented in this article, along with the measured equivalent widths of a large number of X-ray lines and photoionization calculations, lead to the following results and conclusions.
Journal ArticleDOI
Resolved Spectroscopy of the Narrow-Line Region in NGC 1068: Kinematics of the Ionized Gas.
TL;DR: The acceleration of the emission-line clouds provides support for dynamical models that invoke radiation and/or wind pressure and it is suggested that the deceleration of the clouds is due to their collision with a patchy and anistropically distributed ambient medium.
Journal ArticleDOI
The Ionized Gas and Nuclear Environment in NGC 3783 V. Variability and Modeling of the Intrinsic Ultraviolet Absorption
Jack R. Gabel,Steven B. Kraemer,D. Michael Crenshaw,Ian M. George,Ian M. George,W. N. Brandt,Fred Hamann,Mary Elizabeth Kaiser,Shai Kaspi,Shai Kaspi,Gerard A. Kriss,Gerard A. Kriss,Smita Mathur,Kirpal Nandra,Hagai Netzer,Bradley M. Peterson,Joseph C. Shields,T. J. Turner,T. J. Turner,Wei Zheng +19 more
TL;DR: In this article, the location, physical conditions, and geometry of the outflow in the Seyfert 1 galaxy NGC 3783 from a study of the variable intrinsic UV absorption were analyzed.