TY - JOUR
T1 - The connection between the parsec-scale radio jet and γ-ray flares in the blazar 1156+295
AU - Ramakrishnan, Venkatessh
AU - León-Tavares, Jonathan
AU - Rastorgueva-Foi, Elizaveta A.
AU - Wiik, Kaj
AU - Jorstad, Svetlana G.
AU - Marscher, Alan P.
AU - Tornikoski, Merja
AU - Agudo, Iván
AU - Lähteenmäki, Anne
AU - Valtaoja, Esko
AU - Aller, Margo F.
AU - Blinov, Dmitry A.
AU - Casadio, Carolina
AU - Efimova, Natalia V.
AU - Gurwell, Mark A.
AU - Gómez, José L.
AU - Hagen-Thorn, Vladimir A.
AU - Joshi, Manasvita
AU - Järvelä, Emilia
AU - Konstantinova, Tatiana S.
AU - Kopatskaya, Evgenia N.
AU - Larionov, Valeri M.
AU - Larionova, Elena G.
AU - Larionova, Liudmilla V.
AU - Lavonen, Niko
AU - MacDonald, Nicholas R.
AU - McHardy, Ian M.
AU - Molina, Sol N.
AU - Morozova, Daria A.
AU - Nieppola, Elina
AU - Tammi, Joni
AU - Taylor, Brian W.
AU - Troitsky, Ivan S.
N1 - Publisher Copyright:
© 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
PY - 2014/12/1
Y1 - 2014/12/1
N2 - The blazar 1156+295 was active at γ-ray energies, exhibiting three prominent flares during the year 2010. Here, we present results using the combination of broad-band (X-ray through mm single-dish) monitoring data and radio-band imaging data at 43 GHz on the connection of γ-ray events to the ejections of superluminal components and other changes in the jet of 1156+295. The kinematics of the jet over the interval 2007.0-2012.5 using 43 GHz Very Long Baseline Array observations reveal the presence of four moving and one stationary component in the inner region of the blazar jet. The propagation of the third and fourth components in the jet corresponds closely in time to the active phase of the source in γ-rays. We briefly discuss the implications of the structural changes in the jet for the mechanism of γ-ray production during bright flares. To localize the γ-ray emission site in the blazar, we performed the correlation analysis between the 43 GHz radio core and the γ-ray light curve. The time lag obtained from the correlation constrains the γ-ray emitting region in the parsec-scale jet.
AB - The blazar 1156+295 was active at γ-ray energies, exhibiting three prominent flares during the year 2010. Here, we present results using the combination of broad-band (X-ray through mm single-dish) monitoring data and radio-band imaging data at 43 GHz on the connection of γ-ray events to the ejections of superluminal components and other changes in the jet of 1156+295. The kinematics of the jet over the interval 2007.0-2012.5 using 43 GHz Very Long Baseline Array observations reveal the presence of four moving and one stationary component in the inner region of the blazar jet. The propagation of the third and fourth components in the jet corresponds closely in time to the active phase of the source in γ-rays. We briefly discuss the implications of the structural changes in the jet for the mechanism of γ-ray production during bright flares. To localize the γ-ray emission site in the blazar, we performed the correlation analysis between the 43 GHz radio core and the γ-ray light curve. The time lag obtained from the correlation constrains the γ-ray emitting region in the parsec-scale jet.
KW - Galaxies: active
KW - Galaxies: jets
KW - Gamma-rays: galaxies
KW - Quasars: individual: 1156+295
KW - Radio continuum: galaxies
UR - http://www.scopus.com/inward/record.url?scp=84939185112&partnerID=8YFLogxK
U2 - 10.1093/mnras/stu1873
DO - 10.1093/mnras/stu1873
M3 - Article
AN - SCOPUS:84939185112
SN - 0035-8711
VL - 445
SP - 1636
EP - 1646
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 2
ER -