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Galaxies SIG Seminar

Galaxies Science Interest Group

DATE

Feb 07, 2024

TIME

1:00 pm

COMMUNITY

Galaxies SIG

TYPE

Seminar

Using Empirical Models to Explore Science Uncertainties for HWO

Peter Behroozi

We review recent progress in empirical modeling, including a new empirical model, Trinity, that observationally constrains the joint relationship between supermassive black holes (SMBHs), galaxies, and dark matter halos from z=0 to z=7. Trinity can recover the average growth and merger histories of all detectable SMBHs, describe the evolution of the SMBH—galaxy relationship through time, and reveal correlations between galaxy growth and SMBH growth. We discuss how empirical models like Trinity and others can provide forecasts for the range of results expected for new observations with new telescopes, including HWO.

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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.