Multiwavelength investigations of PKS 2300–18: S-shaped radio quasar with precessing jets and double-peaked broad emission-line spectrum

Misra, Arpita; Jamrozy, Marek; Weżgowiec, Marek; Kozieł-Wierzbowska, Dorota

doi:10.1093/mnras/stae2639

Title: Multiwavelength investigations of PKS 2300–18: S-shaped radio quasar with precessing jets and double-peaked broad emission-line spectrum

Journal Article · 25 November 2024 · Monthly Notices of the Royal Astronomical Society

DOI: https://doi.org/10.1093/mnras/stae2639 · OSTI ID:2483377

Misra, Arpita; Jamrozy, Marek; Weżgowiec, Marek; Kozieł-Wierzbowska, Dorota

ABSTRACT S-shaped radio galaxy jets are prime sources for investigating the dynamic interplay between the central active galactic nucleus (AGN), the jets, and the ambient intergalactic medium. These sources are excellent candidates for studying jet precession, as their S-shaped inversion symmetry strongly indicates underlying precession. We present a multiwavelength analysis of the giant inversion-symmetric S-shaped radio galaxy PKS 2300$$-$$18, which spans 0.76 Mpc. The host is a quasar at a redshift of 0.128, displaying disturbed optical morphology due to an ongoing merger with a companion galaxy. We conducted a broad-band radio spectral study using multifrequency data ranging from 183 MHz to 6 GHz, incorporating dedicated observations with the upgraded Giant Metrewave Radio Telescope (uGMRT) and Karl G. Jansky Very Large Array (JVLA) alongside archival radio data. A particle injection model was fitted to the spectra of different regions of the source to perform ageing analysis, which was supplemented with a kinematic jet precession model. The ageing analysis revealed a maximum plasma age of $$\sim$$ 40 Myr, while the jet precession model indicated a precession period of $$\sim$$ 12 Myr. ROentgen SATellite (ROSAT) data revealed an X-ray halo of Mpc size, and from Chandra the AGN X-ray spectrum was modelled using thermal and power-law components. The optical spectrum displaying double-peaked broad emission lines was modelled, indicating complex broad-line region kinematics at the centre with the possibility of a binary SMBH. We present the results of our multiwavelength analysis of the source, spanning scales from a few light-days to a few Mpc, and discuss its potential evolutionary path.

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Sponsoring Organization:: USDOE

OSTI ID:: 2483377

Journal Information:: Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 3 Vol. 536; ISSN 0035-8711

Publisher:: Oxford University PressCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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Wide-Angle-Tail (WAT) Radio Sources O’Dea, Christopher P.; Baum, Stefi A. Galaxies, Vol. 11, Issue 3 https://doi.org/10.3390/galaxies11030067	journal	May 2023
Second Epoch vlba Calibrator Survey Observations: Vcs-Ii Gordon, David; Jacobs, Christopher; Beasley, Anthony The Astronomical Journal, Vol. 151, Issue 6 https://doi.org/10.3847/0004-6256/151/6/154	journal	May 2016
Giant Metrewave Radio Telescope Observations of Head–Tail Radio Galaxies Sebastian, Biny; Lal, Dharam V.; Rao, A. Pramesh The Astronomical Journal, Vol. 154, Issue 4 https://doi.org/10.3847/1538-3881/aa88d0	journal	September 2017
GMRT Low-frequency Imaging of an Extended Sample of X-shaped Radio Galaxies Lal, Dharam V.; Sebastian, Biny; Cheung, C. C. The Astronomical Journal, Vol. 157, Issue 5 https://doi.org/10.3847/1538-3881/ab1419	journal	April 2019
The Structure and Dynamics of the Subparsec Jet in M87 Based on 50 VLBA Observations over 17 Years at 43 GHz Walker, R. Craig; Hardee, Philip E.; Davies, Frederick B. The Astrophysical Journal, Vol. 855, Issue 2 https://doi.org/10.3847/1538-4357/aaafcc	journal	March 2018
A Trio of Massive Black Holes Caught in the Act of Merging Liu, Xin; Hou, Meicun; Li, Zhiyuan The Astrophysical Journal, Vol. 887, Issue 1 https://doi.org/10.3847/1538-4357/ab54c3	journal	December 2019
Double-peaked Lines, Dual VLBI Components, and Precessing Jets in J1328+2752 Nandi, S.; Caproni, A.; Kharb, P. The Astrophysical Journal, Vol. 908, Issue 2 https://doi.org/10.3847/1538-4357/abd2ba	journal	February 2021
MOMO. VI. Multifrequency Radio Variability of the Blazar OJ 287 from 2015 to 2022, Absence of Predicted 2021 Precursor-flare Activity, and a New Binary Interpretation of the 2016/2017 Outburst Komossa, S.; Kraus, A.; Grupe, D. The Astrophysical Journal, Vol. 944, Issue 2 https://doi.org/10.3847/1538-4357/acaf71	journal	February 2023
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