Quasi-periodic behaviour in the radio and gamma-ray light curves of blazar PKS 1510-089
Loading...
Access rights
openAccess
publishedVersion
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
Major/Subject
Mcode
Degree programme
Language
en
Pages
9
Series
Monthly Notices of the Royal Astronomical Society, Volume 519, issue 4, pp. 4893-4901
Abstract
We explore the possible quasi-periodic oscillations (QPOs) of the blazar PKS 1510−089, utilizing the ∼38-yr Metsähovi flux density observations at 37 GHz and over 10-yr Fermi Large Area Telescope observations in the 0.1–300 GeV energy range. Both the flux distributions of the radio and γ-ray light curves suggest a lognormal distribution, and power spectral densities of both light curves can be well represented by a bending power-law model. Comparing the results from the weighted wavelet Z-transform and Lomb–Scargle periodogram approaches, a quasi-period of 1330 ± 55 d at a 99.80 per cent (>3σ) significance against the red noise background is observed in the radio light curve, whereas no similar modulation is seen in the γ-ray light curve. We briefly discuss the research actuality of blazar QPO phenomena and explain the observed radio QPO as the result of Keplerian motion in a supermassive binary black hole system and periodic modulation induced by the Lense–Thirring precession of the innermost portions of the accretion disc.Description
Other note
Citation
Li, XP, Cai, Y, Yang, HY, Lahteenmaki, A, Tornikoski, M, Tammi, J, Suutarinen, S, Yang, H-T, Luo, YH & Wang, LS 2023, 'Quasi-periodic behaviour in the radio and gamma-ray light curves of blazar PKS 1510-089', Monthly Notices of the Royal Astronomical Society, vol. 519, no. 4, pp. 4893-4901. https://doi.org/10.1093/mnras/stad008