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CAPS Seminar: Catching Changing-Look AGN Transitions with the Zwicky Transient Facility

Event Type
Seminar/Symposium
Sponsor
Center for AstroPhysical Surveys
Location
NCSA - 1205 W Clark St, Urbana - RM 1040
Virtual
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Date
Jul 11, 2025   12:30 - 1:00 pm  
Speaker
Margaret Verrico
Contact
Cynthia Trendafilova
E-Mail
ctrendaf@illinois.edu
Originating Calendar
Center for AstroPhysical Surveys

Speaker: Margaret Verrico
Date/Time: July 11, 2025 / 12:30pm central.
Location: NCSA 1040
Zoom: https://illinois.zoom.us/j/82318062756?pwd=M3g1MFF6cytsOWFEbmU0UW1XWVoxQT09
Title: Catching Changing-Look AGN Transitions with the Zwicky Transient Facility
Abstract: Changing-Look AGN (CL-AGN) are AGN which gain or lose broad line emission on timescales less than a decade. Most CL-AGN have been discovered serendipitously in SDSS spectroscopy, making it difficult to determine the timescale and magnitude of the CL-AGN transition. As such, the physical mechanisms behind this transition are still unknown. I present new work measuring the timescale and magnitude of photometric variability in ZTF light curves for known CL-AGN. I find that CL-AGN transitions usually occur on timescales of about a year and can be distinguished from normal AGN variability by the change in their g-band magnitudes.  I also present six Seyfert 1 AGN which are candidates for CL-AGN transitions.

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