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Caltech-NRAO Stripe 82 Survey (CNSS). IV. The Birth of Radio-loud Quasar 013815+00

Kunert-Bajraszewska, Magdalena and Wołowska, Aleksandra and Mooley, Kunal and Kharb, Preeti and Hallinan, Gregg (2020) Caltech-NRAO Stripe 82 Survey (CNSS). IV. The Birth of Radio-loud Quasar 013815+00. Astrophysical Journal, 897 (2). Art. No. 128. ISSN 1538-4357. doi:10.3847/1538-4357/ab9598.

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It is believed that the gas accretion onto supermassive black holes is the main process of powering this quasar's luminous emission, which occurs in optical, UV, and X-ray regimes and less frequently in radio waves. The observational fact that only a few percent of quasars are radio-loud is still an unresolved issue concerning the understanding of the active galactic nucleus (AGN) population. Here we present a detection of a rapid transition from the radio-quiet to the radio-loud mode in quasar 013815+00 (z = 0.94) which coincides with changes of its UV–optical continuum and the low ionization Mg II broadline. We interpret this as an enhancement of accretion onto a central black hole of about 10⁹ solar masses. As a consequence a new radio-loud AGN was born. Its spectral and morphological properties indicate that it went through the short gigahertz-peaked spectrum phase at the beginning of its activity and has now stabilized its flux density at the level of a few millijansky. The radio morphology of 013815+00 is very compact and we predict that with such short-term jet activity its development will be very slow. The observed luminosity changes of the accretion disk are shorter than the lifetime of the new radio phase in 013815+00.

Item Type:Article
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URLURL TypeDescription Paper
Kunert-Bajraszewska, Magdalena0000-0002-6741-9856
Mooley, Kunal0000-0002-2557-5180
Kharb, Preeti0000-0003-3203-1613
Hallinan, Gregg0000-0002-7083-4049
Additional Information:© 2020 The American Astronomical Society. Received 2020 April 5; revised 2020 May 14; accepted 2020 May 20; published 2020 July 9. We thank the anonymous referee for helpful suggestions that led to improvement of the paper. We are grateful to Agnieszka Kuźmicz and Bożena Czerny for the useful discussion. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. We thank the staff of the VLBA and VLA for carrying out these observations in their usual efficient manner. This work made use of the Swinburne University of Technology software correlator, developed as part of the Australian Major National Research Facilities Programme and operated under licence. M.K.B. and A.W. acknowledge support from the National Science Centre, Poland under grant no. 2017/26/E/ST9/00216. K.P.M. is a Jansky Fellow of the National Radio Astronomy Observatory. Software: CASA (McMullin et al. 2007, AIPS (van Moorsel et al. 1996, IRAF (Tody 1986, 1993).
Group:Astronomy Department
Funding AgencyGrant Number
National Science Centre (Poland)2017/26/E/ST9/00216
Jansky FellowshipUNSPECIFIED
National Radio Astronomy ObservatoryUNSPECIFIED
Subject Keywords:Active galactic nuclei ; Radio active galactic nuclei
Issue or Number:2
Classification Code:Unified Astronomy Thesaurus concepts: Active galactic nuclei (16); Radio active galactic nuclei (2134)
Record Number:CaltechAUTHORS:20200710-143659886
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Official Citation:Magdalena Kunert-Bajraszewska et al 2020 ApJ 897 128
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:104336
Deposited By: Tony Diaz
Deposited On:10 Jul 2020 22:06
Last Modified:16 Nov 2021 18:30

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