337 citations · 652 across the 23 of their papers we have counts for
9 papers · 1 filter
Chandra Detection of Local Warm-Hot Gas Toward Markarian 279
Rik J. Williams, Smita Mathur, Fabrizio Nicastro
We report the Chandra detection of OVII Kαabsorption at z=0 in the direction of the z=0.03 Seyfert 1 galaxy Mkn 279. The high velocity cloud Complex C lies along this line of sight…
Galactic Corona or Local Group Intergalactic Medium?
Rik J. Williams, Smita Mathur, Fabrizio Nicastro
Cosmological hydrodynamic simulations predict that the low redshift universe comprises a web of warm-hot intergalactic gas and galaxies, with groups of galaxies and clusters formin…
The radio loud narrow-line quasar SDSSJ172206.03+565451.6
S. Komossa, W. Voges, H. -M. Adorf +3
We report identification of the radio loud narrow-line quasar SDSS J172206.03+565451.6 which we found in the course of a search for radio loud narrow-line Active Galactic Nuclei (A…
The Locus of Highly Accreting AGNs on the M_BH--sigma Plane: Selections, Limitations, and Implications
Smita Mathur, Dirk Grupe
We re-examine the locus of narrow line Seyfert 1 galaxies on the M_BH--sigma (black hole mass--bulge velocity dispersion) plane in the light of the results from large new optically…
Probing The Dust-To-Gas Ratio of z > 0 Galaxies Through Gravitational Lenses
Xinyu Dai, Christopher S. Kochanek, George Chartas +1
We report the detection of differential gas column densities in three gravitational lenses, MG0414+0534, HE1104-1805, and PKS1830-211. Combined with the previous differential colum…
The Ionized Gas and Nuclear Environment in NGC 3783 V. Variability and Modeling of the Intrinsic Ultraviolet Absorption
J. R. Gabel, S. B. Kraemer, D. M. Crenshaw +13
We present results on 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. Based on…