121 citations · 1k across the 48 of their papers we have counts for
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Changing-look event in NGC 3516: continuum or obscuration variability?
Missagh Mehdipour, Gerard A. Kriss, Laura W. Brenneman +6
The Seyfert-1 galaxy NGC 3516 has undergone major spectral changes in recent years. In 2017 we obtained Chandra, NuSTAR, and Swift observations during its new low-flux state. Using…
Transient obscuration event captured in NGC~3227 II. Warm absorbers and obscuration events in archival XMM-Newton and NuSTAR observations
Yijun Wang, Jelle Kaastra, Missagh Mehdipour +18
The relation between warm absorber (WA) outflows of AGN and nuclear obscuration activities caused by optically-thick clouds (obscurers) crossing the line of sight is unclear. NGC 3…
Elemental Abundances of the Hot Atmosphere of Luminous Infrared Galaxy Arp 299
Junjie Mao, Ping Zhou, Aurora Simionescu +8
Hot atmospheres of massive galaxies are enriched with metals. Elemental abundances measured in the X-ray band have been used to study the chemical enrichment of supernova remnants,…
R-matrix electron-impact excitation data for the O-like iso-electronic sequence
Junjie Mao, N. R. Badnell, G. Del Zanna
Astrophysical plasma codes are built on atomic databases. In the current atomic databases, R-matrix electron-impact excitation data of O-like ions are limited. The accuracy of plas…
On the Polarized Absorption Lines in Gamma-ray Burst Optical Afterglows
J. Mao, R. J. Britto, D. A. H. Buckley +3
Spectropolarimetric measurements of gamma-ray burst (GRB) optical afterglows contain polarization information for both continuum and absorption lines. Based on the Zeeman effect, a…