Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/7961
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dc.contributor.authorPandey, Ashwani-
dc.contributor.authorBhoomika, R-
dc.contributor.authorStalin, C. S-
dc.date.accessioned2022-06-20T04:49:47Z-
dc.date.available2022-06-20T04:49:47Z-
dc.date.issued2022-02-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, Vol. 510, No. 2, pp. 1809–1836en_US
dc.identifier.issn1365-2966-
dc.identifier.urihttp://hdl.handle.net/2248/7961-
dc.descriptionRestricted Accessen_US
dc.description.abstractStudy of the polarization behaviour in blazars is a powerful tool to discern the role of the magnetic field in the variable emission process in their relativistic jets. We present here the results of our systematic investigation on the correlation between optical flux and polarization variations for eight flat-spectrum radio quasars on various time-scales using data from the Steward Observatory that covers a period of ∼10 years. On long time-scales (∼several months), from a total of 79 observing cycles, we found a significant positive correlation between optical flux and optical polarization degree (PD) in 34 observing cycles, a negative correlation in three cycles, and no correlation in 42 cycles. On short time-scales (∼few days), in 47 out of a total of 55 epochs we found a positive correlation between optical flux and PD, while for the remaining eight epochs an anticorrelation was detected between the two quantities. Moreover, we noticed a significant positive correlation between optical and γ-ray fluxes in 14 epochs, and a negative correlation between the two in one epoch. While the observed optical flux changes fit the shock-in-jet model well, the observed changes in PD are not explainable by changes in the power-law spectral index of the relativistic electrons in the jet. Instead, the observed varied correlations between optical flux and PD could be due to multizone emission regions or the enhanced flux coinciding with the emergence of a new emission knot with its magnetic field either aligned or misaligned with the large-scale magnetic field.en_US
dc.language.isoenen_US
dc.publisherOxford University Press on behalf of Royal Astronomical Societyen_US
dc.relation.urihttps://doi.org/10.1093/mnras/stab3338-
dc.rights© Royal Astronomical Society-
dc.subjectGalaxies: activeen_US
dc.subjectGalaxies: jetsen_US
dc.subjectGalaxies: nucleien_US
dc.subjectGamma-rays: galaxiesen_US
dc.titleCorrelation between optical flux and polarization variations in flat-spectrum radio quasars on diverse time-scalesen_US
dc.typeArticleen_US
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