Observational Cosmology Laboratory
 

Upcoming Events

Tuesday, March 05, 2024
03:45 PM - 05:00 PM
ASD Colloquium (Hybrid)
Chandra & the SuperMassiveBlackHole – Galaxy Interaction
Giuseppina Fabbiano (Center for Astrophysics, Harvard & Smithsonian)

Launched from Cape Canaveral on July 23, 1999, Chandra is the NASA Great Observatory for the X-ray band. Now in its 25th year of operations, Chandra has revolutionized our view of the X-ray sky, thanks to its sub-arcsecond imaging and spectral capabilities. This talk will introduce Chandra and will then concentrate on Chandra’s contributions to our understanding of one of the open mysteries of Astrophysics: “Feedback” - How is it that supermassive black holes (SMBH, with mass ~10 millions to billions of that of our Sun) in their Active Galactic Nucleus (AGN) phase interact with the billion times larger host galaxy and shape its evolution? Some form of "feedback" is needed to explain universe survey data and simulations, but observationally constraining its physical mechanisms is still an open field of research. Observing nearby AGN host galaxies with Chandra we have studied in detail the spatial and spectral properties of the AGN-host interaction, from spatial scales ranging from a few kiloparsecs (~1/10 of the radius of the Milky Way) to ~30 parsec (~3 times the size of the Orion Nebula). In these galaxies, we have found evidence for all four vectors of feedback: the photons emitted by the AGN (radiation), relativistic jets embedded in the host galaxy disk, and both nuclear winds and, most recently, very fast nuclear winds. These observations are pointing to a revision of the AGN standard model, one where interactions with the host interstellar medium and molecular clouds are important parts of the AGN phenomenon.

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Tuesday, March 12, 2024
10:00 AM - 12:00 PM
ROSES Briefing
Briefing on the 2024 edition of SMD’s annual solicitation Research Opportunities in Space and Earth Sciences (ROSES), presented by Science Mission Directorate R&A Lead Dr. Max Bernstein. Max will describe the changes in ROSES and answer your questions about ROSES and related NASA proposal policy and guidelines.
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Tuesday, March 12, 2024
03:45 PM - 05:00 PM
ASD Colloquium (Hybrid)
Kathryne Daniel (Arizona)
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