Events at Physics
Events on Thursday, January 28th, 2021
- Astro Tool Exchange
- High Dimensional Data Visualization with Glue
- Time: 10:00 am
- Speaker: Cameren Swiggum, University of Wisconsin - Madison
- Abstract: This is an informal one-hour meeting with rotating hosts. For this first installment, UW-Madison graduate student Cameren Swiggum will talk about how he uses Glue (with WorldWide Telescope) in his research workflow.
Come prepared to learn in real-time, ask questions, and *hopefully* walk away with a handy new tool in your toolbox.
Want to know more about Glue? In the link below, Chris Beaumont provides a useful walkthrough of the Glue platform at the 2013 SciPy conference:
Feel free to download the software prior to the meeting if you'd like to try it out beforehand.
Want to see your favorite tool on the Astro Tool Exchange roster? Fill out the poll below. Add missing tools using the "other" feature. The current poll results are attached (as crowd sourced on Twitter).
- Host: Melinda Soares-Furtado
- NPAC (Nuclear/Particle/Astro/Cosmo) Forum
- A Quick Look at the 3GHz Radio Sky: Early Continuum Science from the VLA Sky Survey
- Time: 12:00 pm
- Place: Virtual
- Speaker: Yjan Gordon, University of Manitoba
- Abstract: Zoom info
Meeting ID: 93592708053, passcode: cmbadger
- Host: Keith Bechtol
- Astronomy Colloquium
- "Spatially Resolved Galaxy Interactions
- Time: 3:30 pm
- Place: Zoom meeting Coffee and tea 3:30pm, Talk 3:45 PM
- Speaker: Jorge Moreno, Pomona College
- Abstract: For decades, late-stage galaxy mergers have been recognized as naturally occurring events within the hierarchical LCDM paradigm, capable of triggering starburst and quasars. Early-stage mergers (interactions), albeit not as dramatic as their late-stage counterparts, are believed to shape galaxies in gentler and more long-lasting ways: by enhancing star formation, suppressing gas metallicity, igniting AGNs, augmenting H2 fuel, etc. But more importantly, their cumulative effect may ultimately stimulate the transformation of spirals into lenticulars in dense environments. The focus of this talk is to address the spatial structure and evolution of star formation and the interstellar medium (ISM) in interacting galaxies. We use an extensive suite of parsec-scale galaxy merger simulations (stellar mass ratio = 2.5:1), which employs the "Feedback In Realistic Environments-" model (FIRE-2). This framework resolves star formation, feedback processes, and the multi-phase structure of the ISM. We focus on the galaxy-pair stages of interaction. We find that close encounters substantially augment cool (HI) and cold-dense (H2) gas budgets, elevating the formation of new stars as a result. We also find that galaxies with elevated global star formation rate (SFR) experience intense nuclear SFR enhancement, driven by high levels of either star formation efficiency (SFE) or available cold-dense gas fuel. Galaxies with suppressed global SFR also contain a nuclear cold-dense gas reservoir, but low SFE levels diminish SFR in the central region. Our numerical predictions underscore the need of substantially larger, and/or merger-dedicated, spatially-resolved (integral-field spectroscopic) galaxy surveys -- capable of examining vast and diverse samples of interacting systems -- coupled with multi-wavelength campaigns aimed to capture their internal ISM structure. Zoom Link:
- Host: Melinda Soares-Furtado