Detection of quasi-periodic oscillations from the blazar PKS 1510-089

Li, Xiaopan; Lei, Z. H.; Yan, Yue; Wang, Lisha; Yang, Hai-Tao; Cai, Yan; Luo, Yuhui

doi:10.1007/s12036-021-09773-9

Cited by 12 publications

(7 citation statements)

References 43 publications

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“…In most cases, QPOs claimed in blazar light curves on diverse time-scales seemed to be transient phenomena (e.g. Bhatta 2017 ;Zhou et al 2018 ;Sarkar et al 2021 ;Li et al 2021a ;Roy et al 2022 ). As for PKS 1510 −089, prominent QPOs of about 1080 d with high confidence ( > 4 σ ) in University of Michigan Radio Astronomical Observatory (UMRAO) radio light curves had been reported by Li et al ( 2021a ), who underlined the existence of a transient signature in their detected QPO and the caution of earlier works with no consideration of statistical significance and red noise influence.…”

Section: Discussion a N D C O N C L U S I O N Smentioning

confidence: 99%

Quasi-periodic behaviour in the radio and γ-ray light curves of blazar PKS 1510–089

Cai

Yang

et al. 2023

Monthly Notices of the Royal Astronomical Society

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We explore the possible quasi-periodic oscillations (QPOs) of the blazar PKS 1510–089, utilizing the ∼38-year Metsähovi flux density observations at 37 GHz and over ten-year Fermi-LAT observations in the 0.1–300 GeV energy range. Both the flux distributions of the radio and γ-ray light curves suggest a log-normal distribution, and power spectral densities (PSDs) 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 days at a 99.80% (>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 disk.

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Section: Discussion a N D C O N C L U S I O N Smentioning

confidence: 99%

Quasi-periodic behaviour in the radio and γ-ray light curves of blazar PKS 1510–089

Cai

Yang

et al. 2023

Monthly Notices of the Royal Astronomical Society

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“…Earlier studies have proposed several possible models, such as supermassive binary black-hole systems (Valtonen et al 2008;Villforth et al 2010;Ackermann et al 2015;Li et al 2021), persistent jet precession model (Romero et al 2000;Rieger 2004;Liska et al 2018), and Lense-Thirring precession of accretion disks (Stella & Vietri 1998;Liska et al 2018) to explain the long-term quasi-periodicities in different blazar's emissions. Although PKS 1510-089 is a candidate to contain a binary black-hole system at the centre (Wu et al 2005;Li et al 2007), all these models exhibit persistent QPOs with at least year-long periods.…”

Section: Discussionmentioning

confidence: 99%

“…According to Castignani et al (2017), QPO analysis of hard X-ray data of PKS 1510-089 taken by RXTE-PCA from 1996 to 2011 reveals no obvious periodicity. The most recent QPO study on radio data of PKS 1510-089 spanning over 38 years detects quite significant (> 4𝜎) QPOs of ∼570, ∼800 and ∼1070 days in the 8 GHz and 14.5 GHz light curves (Li et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Transient Quasi-Periodic Oscillations at $γ$-rays in the TeV Blazar PKS 1510-089

Roy,

Sarkar,

Chatterjee

et al. 2021

Preprint

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We present periodicity search analyses on the 𝛾-ray lightcurve of the TeV blazar PKS 1510-089 observed by the Fermi Large Area Telescope. We report the detection of two transient quasi-periodic oscillations: a 3.6-day QPO during the outburst in 2009 that lasted five cycles (MJD 54906-54923); and a periodicity of 92 days spanning over 650 days from 2018 to 2020 (MJD 58200-58850), which lasted for seven cycles. We employed the Lomb-Scargle periodogram, Weighted Wavelet Z-transform, REDFIT, and the Monte Carlo lightcurve simulation techniques to find any periodicity and the corresponding significance. The 3.6-day QPO was detected at a moderate significance of ∼3.5𝜎, while the detection significance of the 92-day QPO was ∼7.0𝜎. We explore a few physical models for such transient QPOs including a binary black hole system, precession of the jet, a non-axisymmetric instability rotating around the central black hole near the innermost stable circular orbit, the presence of quasi-equidistant magnetic islands inside the jet, and a geometric model involving a plasma blob moving helically inside a curved jet.

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“…Thus, these methods have been optimised to have a better performance under this condition, and they have been applied in the past in several temporal studies in blazars (see e.g. Sandrinelli et al 2016;Zhang et al 2017a;Hong et al 2018;Covino et al 2019;Peñil et al 2020;Li et al 2021).…”

Section: Methodology and Analysis Toolsmentioning

confidence: 99%

Multiwavelength periodicity search in a sample of $γ$-ray bright blazars

Otero-Santos¹,

Peñil²,

Acosta–Pulido³

et al. 2022

Preprint

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We present the results of a long-term periodicity search in a sample of 𝛾-ray blazars within a multiwavelength context. These blazars have been selected from the Steward Observatory sample as part of its optical monitoring program between 2008 and 2018. We study 15 sources with a temporal coverage in their optical total and polarized emission sufficiently large (> 9 years) to perform a reliable long-term periodicity analysis. We collect data from several observatories to extend the coverage, enabling the search of longer periods. In addition, data are also gathered in the high-energy (𝐸 > 100 MeV) 𝛾-ray band from the Fermi Large Area Telescope; and in the 15-GHz radio band from the Owens Valley Radio Observatory. We identify 5 promising candidates to host quasi-periodic emission, AO 0235+164, PKS 1222+216, Mrk 501, BL Lacertae and 1ES 2344+514 with periods in one or more bands and statistical significances ∼3𝜎 after trial factor correction. AO 0235+164 shows a period of ∼8.2 years in the R band; PKS 1222+216 has a quasi-periodic modulation in its total and polarized optical emission of ∼1.6 years; Mrk 501 displays a ∼5-year quasi-periodicity in optical and radio wavelengths; BL Lacertae presents a period of ∼1.8 years in its polarized emission; and 1ES 2344+514 shows a hint of a ∼5.5-year period in its optical R band. We interpret these results in the framework of the most common models and scenarios, namely the presence of a binary supermassive black hole system; or geometrical effects like helical or precessing jets.

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Detection of quasi-periodic oscillations from the blazar PKS 1510-089

Cited by 12 publications

References 43 publications

Quasi-periodic behaviour in the radio and γ-ray light curves of blazar PKS 1510–089

Quasi-periodic behaviour in the radio and γ-ray light curves of blazar PKS 1510–089

Transient Quasi-Periodic Oscillations at $γ$-rays in the TeV Blazar PKS 1510-089

Multiwavelength periodicity search in a sample of $γ$-ray bright blazars

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