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Galaxies SIG Seminar

Galaxies Science Interest Group

DATE

Jun 05, 2024

TIME

1:00pm

COMMUNITY

Galaxies SIG

TYPE

Seminar

Modeling the Interstellar Medium of Galaxies

Rahul Kannan

The Habitable Worlds Observatory is set to provide groundbreaking imaging and spectroscopic observations of galaxies, which will greatly enhance our understanding of how galaxies form and evolve. To fully capitalize on these new observations, it is crucial to develop advanced numerical models that can accurately predict the complex physics involved in galaxy formation. In this presentation, I will introduce an interstellar medium (ISM) model that self-consistently incorporates the effect of radiation fields, dust physics, and molecular chemistry (H2) in galaxies. I will showcase the model’s success in predicting both the integrated (such as stellar masses and star formation rates) and resolved (such as dust content, emission lines, etc.) properties of high and low redshift galaxies. Lastly, I will discuss the limitations of current models and outline improvements to both the physical models and numerical algorithms that will allow us to effectively interpret data from next-generation telescopes.

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An illustration of Sun-like star HD 181327 and its surrounding debris disk. The star is at top right. It is surrounded by a far larger debris disk that forms an incomplete ellpitical path and is cut off at right. There’s a huge cavity between the star and the disk. The debris disk is shown in shades of light gray. Toward the top and left, there are finer, more discrete points in a range of sizes. The disk appears hazier and smokier at the bottom. The star is bright white at center, with a hazy blue region around it. The background of space is black. The label Artist's Concept appears at lower left.