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AGN SIG Seminar

Active Galactic Nuclei Science Interest Group

DATE

May 09, 2023

TIME

12:00 pm EST

COMMUNITY

AGN SIG

TYPE

Seminar

Unveiling Luminous Obscured Black Hole Growth with the Wide-Area Multi-Wavelength Stripe 82X Survey

Stephanie LaMassa

Luminous obscured AGN represent a key phase in the cosmic growth history of supermassive black holes. Since these AGN are rare, they can only be adequately sampled via wide-area surveys that probe a large volume of the Universe. “Stripe 82X,” an X-ray survey covering ~30 deg2 of the rich multi-wavelength Sloan Digital Sky Survey Stripe 82 field, is designed to uncover this population and constrain their evolution and impact on their host galaxies. In this talk, I will summarize the AGN demographics discovered in Stripe 82X and how they compare with AGN identified from wide-area optical and mid-infrared surveys. I will discuss what we have learned about the host galaxies of these luminous AGN and how the obscured AGN fraction evolves with redshift and luminosity. Finally, I will mention exciting future prospects for learning more about the cosmic evolution of rare (yet important!) high-redshift, high luminosity obscured AGN.

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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.