Thursday, April 18, 2024
03:45 PM - 05:00 PM
Special ASD Colloquium (Hybrid)
Observational Benchmarks of Chemical Evolution from Extreme Emission Line Galaxies
Danielle Berg (University of Texas in Austin)
The advent of the James Webb Space Telescope has opened our first window onto detailed abundance studies of high redshift (z > 6) extreme emission line galaxies. The coming years will provide the first spectroscopic samples of these galaxies in the epoch of reionization with which we can constrain their chemical compositions and histories and resulting conditions that shaped the escape of ionizing photons. As we build our samples of high-ionization nebular emission lines and absorption profiles of outflowing gas, we can begin to understand how the time-dependent nature of elemental production affects our interpretation of different epochs of galaxies and the resulting strung-together evolutionary story. I will present recent HST and JWST observations of the dynamic ISM across multiple epochs and the lessons we are learning about chemical evolution, star formation histories, and feedback prescriptions.
Read more about this event Danielle Berg (University of Texas in Austin)
The advent of the James Webb Space Telescope has opened our first window onto detailed abundance studies of high redshift (z > 6) extreme emission line galaxies. The coming years will provide the first spectroscopic samples of these galaxies in the epoch of reionization with which we can constrain their chemical compositions and histories and resulting conditions that shaped the escape of ionizing photons. As we build our samples of high-ionization nebular emission lines and absorption profiles of outflowing gas, we can begin to understand how the time-dependent nature of elemental production affects our interpretation of different epochs of galaxies and the resulting strung-together evolutionary story. I will present recent HST and JWST observations of the dynamic ISM across multiple epochs and the lessons we are learning about chemical evolution, star formation histories, and feedback prescriptions.
Tuesday, April 23, 2024
03:45 PM - 05:00 PM
ASD Colloquium (Hybrid)
The hot circumgalactic medium
Smita Mathur (Ohio State)
The circumgalactic medium (CGM) is an important component of a galaxy, at the interface between the intergalactic medium and the galactic disk, playing a critical role in galaxy formation and evolution. The X-ray missions Chandra, XMM-Newton, and Suzaku opened a new window on CGM studies, allowing us to probe the warm-hot gas where most of the galactic baryons reside. In over two decades since the launch of the great X-ray observatories, we have made great strides in understanding the CGM, but significant challenges remain. I'll review our progress so for, highlight new discoveries, outline the open questions, and discuss paths for future progress.
Read more about this event Smita Mathur (Ohio State)
The circumgalactic medium (CGM) is an important component of a galaxy, at the interface between the intergalactic medium and the galactic disk, playing a critical role in galaxy formation and evolution. The X-ray missions Chandra, XMM-Newton, and Suzaku opened a new window on CGM studies, allowing us to probe the warm-hot gas where most of the galactic baryons reside. In over two decades since the launch of the great X-ray observatories, we have made great strides in understanding the CGM, but significant challenges remain. I'll review our progress so for, highlight new discoveries, outline the open questions, and discuss paths for future progress.
Wednesday, April 24, 2024
12:30 PM - 01:30 PM
Goddard Centerwide Town Hall
Goddard Center Director Dr. Makenzie Lystrup will host the next centerwide town hall from the Goddard Institute for Space Studies (GISS) in New York. Topics for discussion will include the latest budget updates, Goddard 2040, the center’s role in the agency’s Artemis program and Moon to Mars strategy, and the importance of GISS and Earth science missions to the Goddard portfolio.
Read more about this event Wednesday, April 24, 2024
02:00 PM - 03:00 PM
SMD Town Hall
Details to follow
Read more about this event Wednesday, April 24, 2024
03:00 PM - 04:30 PM
Scientific Colloquium - BLDG 8
Planet Nine from Outer Space: A Status Update and New Evidence
Konstantin Batygin (California Institute of Technology)
Read more about this event Konstantin Batygin (California Institute of Technology)
Thursday, April 25, 2024
03:00 PM - 04:00 PM
AGN Seminar (Teams Only)
Feeding, feedback, and dust in local “active” galaxies
Marina Bianchin (University of California, Irvine)
Galaxy evolution is one of the main topics of modern-day Astrophysics. The details of how galaxies evolve are still not fully understood from both theoretical and observational perspectives. Galaxy mergers, fast star formation, and active galactic nuclei (AGN) are believed to be crucial in shaping galaxies to their current evolutionary stage. These phenomena peaked at the time known as cosmic noon (z~2) where Ultra-Luminous Infrared Galaxies ((U)LIRGs, galaxies with LIR≥1011Lsun) are also prevalent. In the local Universe (U)LIRGs are also observed, allowing the detailed study of their physical properties in conditions analogous to those in the higher redshift population. In my talk I will explore the results from the JWST ERS program, focusing on the NGC 7469 galaxy. NGC 7469 is a nearby (z=0.016) Sy 1.5 galaxy classified as an LIRG with a prominent star-forming ring. Its face-on morphology makes it an ideal target to study the interplay between star formation regions and AGN. We used JWST spectroscopic capabilities to study the high ionization emission lines, the molecular gas, and the dust content revealing the role of the supermassive black hole feeding and feedback in this galaxy. I will also highlight the recent results of another JWST GO program where we observed the first spatially resolved warm molecular gas outflows in a radio galaxy and talk about the preliminary results of a survey of such outflow and molecular gas properties in nearby (U)LIRGs.
Read more about this event Marina Bianchin (University of California, Irvine)
Galaxy evolution is one of the main topics of modern-day Astrophysics. The details of how galaxies evolve are still not fully understood from both theoretical and observational perspectives. Galaxy mergers, fast star formation, and active galactic nuclei (AGN) are believed to be crucial in shaping galaxies to their current evolutionary stage. These phenomena peaked at the time known as cosmic noon (z~2) where Ultra-Luminous Infrared Galaxies ((U)LIRGs, galaxies with LIR≥1011Lsun) are also prevalent. In the local Universe (U)LIRGs are also observed, allowing the detailed study of their physical properties in conditions analogous to those in the higher redshift population. In my talk I will explore the results from the JWST ERS program, focusing on the NGC 7469 galaxy. NGC 7469 is a nearby (z=0.016) Sy 1.5 galaxy classified as an LIRG with a prominent star-forming ring. Its face-on morphology makes it an ideal target to study the interplay between star formation regions and AGN. We used JWST spectroscopic capabilities to study the high ionization emission lines, the molecular gas, and the dust content revealing the role of the supermassive black hole feeding and feedback in this galaxy. I will also highlight the recent results of another JWST GO program where we observed the first spatially resolved warm molecular gas outflows in a radio galaxy and talk about the preliminary results of a survey of such outflow and molecular gas properties in nearby (U)LIRGs.
Swift: A Decade of Game-changing Astrophysics
Over the past decade, NASA's Swift Gamma-ray Burst Explorer has proven itself to be one of the most versatile astrophysics missions ever flown.
Highlights of Swift's Decade of Discovery
NASA's Swift satellite rode to orbit aboard a Delta II rocket on November 20, 2004, and it's still going strong.
At 7:26 this morning, BurstCube was successfully deployed from the ISS. The team now awaits the opportunity to communicate with the satellite, some t...
Thursday, April 18, 2024Congratulations to the following 660 members for receiving Agency Honor Awards! Scott Barthelmy: Exceptional Public Service Medal Koji Mukai: Exce...
Monday, April 01, 2024