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- Michigan State UniversityUS91 papers
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4 papers · 2 filters
Space Telescope and Optical Reverberation Mapping Project. X. Understanding the Absorption-Line Holiday in NGC 5548
M. Dehghanian, G. J. Ferland, G. A. Kriss +27
The flux variations in the emission lines in active galactic nuclei (AGNs) are driven by variations in the ionizing continuum flux --which are usually reflected in the observable U…
The Changing-Look Quasar Mrk 590 is Awakening
S. Mathur, K. D. Denney, A. Gupta +9
Mrk 590 was originally classified as a Seyfert 1 galaxy, but then it underwent dramatic changes: the nuclear luminosity dropped by over two orders of magnitude and the broad emissi…
Quantifying the Diffuse Continuum Contribution of BLR Clouds to AGN Continuum Inter-band Delays
Daniel Lawther, Michael R. Goad, Kirk T. Korista +2
Disk reverberation mapping of a handful of nearby AGN suggest accretion disk sizes which are a factor few too large for their luminosities, apparently at odds with the standard mod…
Neutron-Capture elements in planetary nebulae: first detections of near-Infrared [Te III] and [Br V] emission lines
Simone Madonna, Manuel A. Bautista, Harriet Dinerstein +6
We have identified two new near-infrared emission lines in the spectra of planetary nebulae (PNe) arising from heavy elements produced by neutron capture reactions: [Te III] 2.1019…