339 citations · 2.6k across the 37 of their papers we have counts for
38 papers
Interpreting the Ionization Sequence in Star-Forming Galaxy Emission-Line Spectra
Chris T. Richardson, James T. Allen, Jack A. Baldwin +4
High ionization star forming (SF) galaxies are easily identified with strong emission line techniques such as the BPT diagram, and form an obvious ionization sequence on such diagr…
Short-Timescale monitoring of the X-ray, UV and broad double-peak emission line of the nucleus of NGC 1097
Jaderson S. Schimoia, Thaisa Storchi-Bergmann, Dirk Grupe +5
Recent studies have suggested that the short-timescale ( days) variability of the broad (10,000 km s) double-peaked H profile of the LINER nucleus of NGC…
The Metallicities of the Broad Emission Line Regions in the Nitrogen-Loudest Quasars
Neelam Dhanda Batra, Jack A. Baldwin
We measured the metallicity Z in the broad emission line regions (BELRs) of 43 SDSS quasars with the strongest N IV] and N III] emission lines. These N-Loud QSOs have unusually low…
Outflows from active galactic nuclei: The BLR-NLR metallicity correlation
Pu Du, Jian-Min Wang, Chen Hu +4
The metallicity of active galactic nuclei (AGNs), which can be measured by emission line ratios in their broad and narrow line regions (BLRs and NLRs), provides invaluable informat…
Interpreting the Ionization Sequence in AGN Emission-Line Spectra
Chris T. Richardson, James T. Allen, Jack A. Baldwin +2
We investigate the physical cause of the great range in the ionization level seen in the spectra of narrow lined active galactic nuclei (AGN). Mean field independent component anal…
Detecting the rapidly expanding outer shell of the Crab Nebula: where to look
Xiang Wang, G. J. Ferland, J. A. Baldwin +2
We present a range of steady-state photoionization simulations, corresponding to different assumed shell geometries and compositions, of the unseen postulated rapidly expanding out…