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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Multiwavelength flaring activity of PKS 1510-089

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Beaklini, Pedro P. B. [1] ; Dominici, Tania P. [2] ; Abraham, Zulema [1]
Total Authors: 3
[1] Univ Sao Paulo, Inst Astron, Geofis & Ciencias Atmosfer, Rua Matao 1226, BR-05508090 Sao Paulo, SP - Brazil
[2] MCTIC, MAST, Museu Astron & Ciencias Afins, Rua Gen Bruce 586, BR-20921030 Rio De Janeiro - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Astronomy & Astrophysics; v. 606, OCT 17 2017.
Web of Science Citations: 3

Aims. In this work, we analyse the multiwavelength brightness variations and flaring activity of FSRQ PKS 1510-089, aiming to constrain the position of the emission sources. Methods. We report 7 mm (43 GHz) radio and R-band polarimetric observations of PKS 1510-089. The radio observations were performed at the Itapetinga Radio Observatory, while the polarimetric data were obtained at the Pico dos Dias Observatory. The 7 mm observations cover the period between 2011 and 2013, while the optical polarimetric observations were made between 2009 and 2012. Results. At 7 mm, we detected a correlation between four radio and gamma-ray flares with a delay of about 54 days between them; the higher frequency counterpart occurred first. Using optical polarimetry, we detected a large variation in polarization angle (PA) within two days associated with the beginning of a gamma-ray flare. Complementing our data with other data obtained in the literature, we show that PA presented rotations associated with the occurrence of flares. Conclusions. Our results can be explained by a shock-in-jet model, in which a new component is formed in the compact core producing an optical and/or gamma-ray flare, propagates along the jet, and after some time becomes optically thin and is detected as a flare at radio frequencies. The variability in the polarimetric parameters can also be reproduced; we can explain large variation in both PA and polarization degree (PD), in only one of them, or in neither, depending on the differences in PA and PD between the jet and the new component. (AU)

FAPESP's process: 14/07460-0 - Targets for LLAMA: study of variability of radio sources at 43 GHz (band 1) and search for correlation with interferometric images
Grantee:Pedro Paulo Bonetti Beaklini
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 08/11382-3 - A AGN study in the age of the Fermi and the H.E.S.S
Grantee:Pedro Paulo Bonetti Beaklini
Support type: Scholarships in Brazil - Doctorate