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High Dust Depletion in Two Intervening Quasar Absorption Line Systems with the 2175-Å Extinction Bump at
Peng Jiang, Jian Ge, J. Xavier Prochaska +3
We present the column densities of heavy-elements and dust depletion studies in twostrong Mg~II absorption systems at displaying the 2175-Å dust extinction feature. Colu…
The Hot Interstellar Medium of the Interacting Galaxy NGC 4490
A. J. Richings, G. Fabbiano, Junfeng Wang +1
We present an analysis of the hot interstellar medium (ISM) in the spiral galaxy NGC 4490, which is interacting with the irregular galaxy NGC 4485, using ~100ks of Chandra ACIS-S o…
Extended X-ray Emission in the HI Cavity of NGC 4151: Galaxy-scale AGN Feedback?
Junfeng Wang, Giuseppina Fabbiano, Guido Risaliti +5
We present the Chandra discovery of soft diffuse X-ray emission in NGC 4151 (L[0.5-2keV]~10^{39} erg s), extending ~2 kpc from the active nucleus and filling in the cavity o…
A Chandra Study of the Rosette Star-Forming Complex. III. The NGC 2237 Cluster and the Region's Star Formation History
Junfeng Wang, Eric D. Feigelson, Leisa K. Townsley +4
We present Chandra X-ray images of the NGC 2237 young star cluster on the periphery of the Rosette Nebula. We detect 168 X-ray sources, 80% of which have counterparts in USNO, 2MAS…
Revisit Short Term X-ray Spectral Variability of NGC 4151 with Chandra
Junfeng Wang, G. Risaliti, G. Fabbiano +3
We present new X-ray spectral data for the Seyfert 1 nucleus in NGC 4151 observed with Chandra for 200 ks. A significant ACIS pileup is present, resulting in a non-linear count rat…