445 citations · 3.5k across the 39 of their papers we have counts for
17 papers · 2 filters
Quasar Winds as Dust Factories at High Redshift
Martin Elvis, Massimo Marengo, Margarita Karovska
Winds from AGN and quasars will form large amounts of dust, as the cool gas in these winds passes through the (pressure, temperature) region where dust is formed in AGB stars. Cond…
Rapid N_H Changes in NGC 4151
S. Puccetti, G. Risaliti, F. Fiore +4
We have analyzed two long BeppoSAX observations of the bright Seyfert galaxy NGC 4151, searching for short timescale (10-200 ksec) X-ray spectral variability. The light curve of a…
Quasar Atmospheres: Toward a "Low" Theory for Quasars
Martin Elvis
After 40 years we have no "low" theory of quasars to predict the atomic absorption and emission features so abundant in quasar spectra. Here I take the first step, using results se…
Spatially Resolved Circumnuclear Dust in Centaurus A
Margarita Karovska, Massimo Marengo, Martin Elvis +6
In this paper we present results from our exploratory mid-IR study of Centaurus A circumnuclear environment using high-angular resolution imaging at the Magellan 6.5m telescope wit…
X-Ray Sources Overdensity Around the 3C 295 Galaxy Cluster
V. D'Elia, F. Fiore, M. Elvis +4
We present a statistical analysis of the Chandra observation of the source field around the 3C 295 galaxy cluster (). The logN-logS of this field is in good agreement with…
X-Ray Sources Overdensity Around 3C 295
V. D'Elia, F. Fiore, M. Elvis +4
We present a statistical analysis of the Chandra observation of the source field around the 3C 295 galaxy cluster (). Three different methods of analysis, namely a chip by…