445 citations · 4.4k across the 88 of their papers we have counts for
5 papers · 2 filters
Missing Baryons and the Warm-Hot Intergalactic Medium
F. Nicastro, Smita Mathur, Martin Elvis
Stars and gas in galaxies, hot intracluster medium, and intergalactic photo-ionized gas make up at most half of the baryons that are expected to be present in the universe. The maj…
The Near-Infrared Broad Emission Line Region of Active Galactic Nuclei -- I. The Observations
Hermine Landt, Misty C. Bentz, Martin J. Ward +4
We present high quality (high signal-to-noise ratio and moderate spectral resolution) near-infrared (near-IR) spectroscopic observations of 23 well-known broad-emission line active…
Occultation measurement of the size of the X-ray emitting region in the Active Galactic Nucleus of NGC 1365
G. Risaliti, M. Elvis, G. Fabbiano +3
We present an occultation of the central X-ray emitting region in the Seyfert Galaxy NGC 1365. This extreme spectral variation (from Compton-thin to reflection-dominated and back t…
Time-Evolving Photoionization: the Thin and Compact X-Ray Wind of NGC 4051
Fabrizio Nicastro, Yair Krongold, Martin Elvis +3
We discuss the power of time-evolving photoionization as a diagnostic tool to measure the electron density of photoionized gas. We apply this technique to a XMM-Newton observation…
A deep Chandra look at the low L_B elliptical NGC821: X-ray binaries, a galactic wind and emission at the nucleus
S. Pellegrini, A. Baldi, D. W. Kim +4
The relatively nearby (distance=24.1 Mpc) elliptical galaxy NGC821, hosting a central massive black hole but inactive at all wavelengths, was observed with Chandra for a total expo…