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Variable Radio AGN at High Redshift Identified in the VLA Sky Survey

Nyland, Kristina and Dong, Dillon and Patil, Pallavi and Lacy, Mark and Kimball, Amy and Hallinan, Gregg and Sarbadhicary, Sumit and Polisensky, Emil and Kassim, Namir and Peters, Wendy and Clarke, Tracy and Mukherjee, Dipanjan and van Velzen, Sjoert and Baldassare, Vivienne (2020) Variable Radio AGN at High Redshift Identified in the VLA Sky Survey. . (Unpublished)

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As part of an on-going study of radio transients in Epoch 1 (2017-2019) of the Very Large Array Sky Survey (VLASS), we have discovered a sample of 0.2<z<3.2 active galactic nuclei (AGN) selected in the optical/infrared that have recently brightened dramatically in the radio. These sources would have previously been classified as radio-quiet based on upper limits from the Faint Images of the Radio Sky at Twenty-centimeters (FIRST; 1993-2011) survey; however, they are now consistent with radio-loud quasars. We present a quasi-simultaneous, multi-band (1-18 GHz) VLA follow-up campaign of our sample of AGN with extreme radio variability. We conclude that the radio properties are most consistent with AGN that have recently launched jets within the past few decades, potentially making them among the youngest radio AGN known.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Nyland, Kristina0000-0003-1991-370X
Dong, Dillon0000-0001-9584-2531
Patil, Pallavi0000-0002-9471-8499
Lacy, Mark0000-0002-3032-1783
Hallinan, Gregg0000-0002-7083-4049
Kassim, Namir0000-0001-8035-4906
van Velzen, Sjoert0000-0002-3859-8074
Group:Astronomy Department
Subject Keywords:galaxies: active, galaxies: jets, galaxies: evolution
Record Number:CaltechAUTHORS:20200604-161743307
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103726
Deposited By: George Porter
Deposited On:05 Jun 2020 14:11
Last Modified:05 Jun 2020 14:11

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