107 citations · 400 across the 22 of their papers we have counts for
9 papers · 1 filter
Tackling the soft X-ray excess in AGN with variability studies
Anne M. Lohfink, Christopher S. Reynolds, Richard F. Mushotzky +1
The origin of the soft X-ray excess in AGN has been a mystery ever since its discovery. We present how the time variability of this spectral component can point towards its origin.…
The Microquasar Cyg X-1: A Short Review
Michael A. Nowak, Joern Wilms, Katja Pottschmidt +1
We review the spectral properties of the black hole candidate Cygnus X-1. Specifically, we discuss two recent sets of multi-satellite observations. One comprises a 0.5-500 keV spec…
The accretion disk corona and disk atmosphere of 4U 1624-490 as viewed by the Chandra-HETGS
Jingen Xiang, Julia C. Lee, Michael A. Nowak +2
We present a detailed spectral study (photoionization modelling and variability) of the "Big Dipper" 4U 1624-490 based on a \chandra-High Energy Transmission Gratings Spectrometer…
The Photoionized Accretion Disk in Her X-1
L. Ji, N. Schulz, M. Nowak +2
We present an analysis of several high-resolution Chandra grating observations of the X-ray binary pulsar Her X-1. With a total exposure of 170 ks, the observations are separated b…
Structure and Evolution of Pre-Main Sequence Stars
Norbert S. Schulz, Glenn Allen, Mark W. Bautz +28
Low-mass pre-main sequence (PMS) stars are strong and variable X-ray emitters, as has been well established by EINSTEIN and ROSAT observatories. It was originally believed that thi…
Distribution and Structure of Matter in and around Galaxies
Norbert S. Schulz, Glenn Allen, Mark W. Bautz +24
Understanding the origins and distribution of matter in the Universe is one of the most important quests in physics and astronomy. Themes range from astro-particle physics to chemi…