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Accretion Disc Wind Variability in the States of the Microquasar GRS 1915+105
Joseph Neilsen, Andrew J. Petschek, Julia C. Lee
Continuing our study of the role and evolution of accretion disc winds in the microquasar GRS 1915+105, we present high-resolution spectral variability analysis of the beta and gam…
Using the X-ray Dust Scattering Halo of Cygnus X-1 to determine distance and dust distributions
Jingen Xiang, Julia C. Lee, Michael A. Nowak +1
We present a detailed study of the X-ray dust scattering halo of the black hole candidate \cygx1 based on two \chandra\ HETGS observations. Using 18 different dust models, includin…
The Physics of the 'Heartbeat' State of GRS 1915+105
Joseph Neilsen, Ronald A. Remillard, Julia C. Lee
We present the first detailed phase-resolved spectral analysis of a joint Chandra High Energy Transmission Grating Spectrometer and Rossi X-ray Timing Explorer observation of the r…
The Spin of the Supermassive Black Hole in NGC 3783
L. W. Brenneman, C. S. Reynolds, M. A. Nowak +9
The Suzaku AGN Spin Survey is designed to determine the supermassive black hole spin in six nearby active galactic nuclei (AGN) via deep Suzaku stares, thereby giving us our first…
A multiwavelength study of Cygnus X-1: the first mid-infrared spectroscopic detection of compact jets
Farid Rahoui, Julia C. Lee, Sebastian Heinz +4
We report on a Spitzer/IRS (mid-infrared), RXTE/PCA+HEXTE (X-ray), and Ryle (radio) simultaneous multiwavelength study of the microquasar Cygnus X-1, which aimed at an investigatio…
A Detection of an X-ray Wind and an Ionized Disk in the Chandra HETGS Observation of the Seyfert 2 Galaxy IRAS 18325-5926
Philip Mocz, Julia C. Lee, Kazushi Iwasawa +1
We analyze the \textit{Chandra} High Energy Transmission Grating Spectrometer (HETGS) observation of the Seyfert AGN IRAS\,18325-5926. We detect a ~km~s$^{-…