DGCE SIG Seminar, 25 June 2026
Article excerpt
Cosmic Origins Science in the New Landscape of Space Astrophysics. Speaker: Swara Ravindranath, Deputy Chief Scientist of NASA’s Cosmic Origins Program (NASA GSFC) The post DGCE SIG Seminar, 25 June 2026 appeared first on NASA Science.
Cosmic Origins…
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AGN SIG Spotlight Series, 23…
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AGN SIG Spotlight Series Seminar
Active Galactic Nuclei Science Interest Group
AGN SIG about AGN SIG Spotlight Series Seminar
Location
Virtual
Dates
23 June 2026 1:00pm ET / 10:00am PT
Community
AGN SIG
Type
Seminar
Our Spotlight Series highlights recent advances in AGN science, with a strong emphasis on participation from early-career researchers, and includes plenty of time for community discussion following the presentations.
Central Shocks and Metal-Enriched Outflows: A New View of AGN Feedback
Speaker
Peixin Zhu (Harvard University)
Abstract
The growth of galaxies and their central supermassive black holes (SMBHs) is tightly linked. However, the exact impact of active galactic nuclei (AGNs) feedback on the host galaxy is still uncertain, with different observations suggesting AGNs enhance, suppress, or do not affect the host galaxy star formation rate. Resolving these controversies requires proper treatment of shocks, which are known to exist with AGN-driven outflow and yet are difficult to distinguish from AGN emission. In my talk, I will present a new theoretical three-dimensional diagram built for integral-field spectroscopy that cleanly separates star formation, AGN, and shock-dominated spaxels. Furthermore, these separation results can be combined with theoretical diagnostics to map the spatial distribution of gas-phase metallicity, ionization parameter, and gas pressure within these galaxies. After applying this new technique to 8 nearby Seyfert galaxies, we reveal that AGN and star formation coexist in the galaxy center, and fast shocks are present at the base of AGN outflows in some galaxies. We also find that outflowing gas is systematically metal-enhanced relative to adjacent star-forming rings. I will discuss how these results refine the picture of AGN feedback and the implications for nuclear enrichment and gas transport.
Investigating AGN Feeding and Feedback Through Circumnuclear Gas Kinematics in NGC 3079 and NGC 1068
Speaker
Dr. Ming-Yi Lin (University of Toledo)
Abstract
Studying gas kinematics in the circumnuclear regions (Seminar Connection
Zoom Registration, you will receive connection details by email after registration: https://zoom.us/j/97689874465?pwd=XZNUqr19oopa1LfD7hgln1aQ2vbnT2.1
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The post AGN SIG Spotlight Series, 23 June 2026 appeared first on NASA Science.