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Center for Astrophysics Research and Technologies Seminar Series Information


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Compact Symmetric Objects: Our Key to Understanding the Birth of Radio Jets

Thursday March 28, 2024
2:00 pm

 Presenter:  Evan Sheldahl
 Series:  Center for Astrophysics Research and Technologies Seminar Series
 Abstract:  Compact symmetric objects (CSOs) are a class of radio-loud active galactic nuclei (AGN) smaller than 1 kpc and oriented near the plane of the sky. For years after their discovery, they fell by the wayside despite being morphologically different from beamed AGN, which constitute the vast majority of known AGN. Recent publications by members of my research team have revitalized the CSO discussion by introducing updated classification criteria, proposing a unique fueling mechanism, and organizing CSOs into two distinct groups: core-dominated CSO 1s and lobe-dominated CSO 2s. Studying these sources may shed light onto how radio AGN operate at early stages in their lives. I will describe my efforts toward discovering new CSOs with the Very Long Baseline Array (VLBA), presenting some curious cases found along the way, as well as my focused investigation into CSO 1s with the VLBA and Fermi Large Area Telescope (LAT).
 Host:  Diana Dragomir
 Location:  PAIS-3205, PAIS

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