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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Multiwavelength flaring activity of PKS 1510-089

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Autor(es):
Beaklini, Pedro P. B. [1] ; Dominici, Tania P. [2] ; Abraham, Zulema [1]
Número total de Autores: 3
Afiliação do(s) autor(es):
[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
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Astronomy & Astrophysics; v. 606, OCT 17 2017.
Citações Web of Science: 3
Resumo

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)

Processo FAPESP: 14/07460-0 - Alvos para o LLAMA: estudo da variabilidade de rádio fontes em 43 GHz (banda 1) e busca por correlação com imagens interferométricas
Beneficiário:Pedro Paulo Bonetti Beaklini
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 08/11382-3 - Estudo das AGNs na era do Fermi e do H.E.S.S
Beneficiário:Pedro Paulo Bonetti Beaklini
Linha de fomento: Bolsas no Brasil - Doutorado