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Discovery of off-axis jet structure of TeV blazar Mrk 501 with mm-VLBI

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Discovery of off-axis jet structure of TeV blazar Mrk 501 with mm-VLBI

dc.contributor.author	Koyama, S.
dc.contributor.author	Kino, M.
dc.contributor.author	Giroletti, M.
dc.contributor.author	Doi, A.
dc.contributor.author	Giovannini, G.
dc.contributor.author	Orienti, M.
dc.contributor.author	Hada, K.
dc.contributor.author	Ros Ibarra, Eduardo
dc.contributor.author	Niinuma, K.
dc.contributor.author	Nagai, H.
dc.contributor.author	Savolainen, Tuomas
dc.contributor.author	Krichbaum, T. P.
dc.contributor.author	Pérez Torres, Miguel Ángel
dc.date.accessioned	2017-07-04T14:00:53Z
dc.date.available	2017-07-04T14:00:53Z
dc.date.issued	2016
dc.identifier.citation	Koyama, S. Kino, M. Giroletti, M. Doi, A. Giovannini, G. Orienti, M. Hada, K. Ros Ibarra, Eduardo Niinuma, K. Nagai, H. Savolainen, Tuomas Krichbaum, T. P. Perez Torres, Miguel Angel 2016 Discovery of off-axis jet structure of TeV blazar Mrk 501 with mm-VLBI Astronomy and Astrophysics 586 A113 1 10
dc.identifier.uri	http://hdl.handle.net/10550/59333
dc.description.abstract	Context. High-resolution millimeter wave very-long-baseline interferometry (mm-VLBI) is an ideal tool for probing the structure at the base of extragalactic jets in detail. The TeV blazar Mrk 501 is one of the best targets among BL Lac objects for studying the nature of off-axis jet structures because it shows different jet position angles at different scales. Aims. The aim of this study is to investigate the properties of the off-axis jet structure through high-resolution mm-VLBI images at the jet base and physical parameters such as kinematics, flux densities, and spectral indices. Methods. We performed Very Long Baseline Array (VLBA) observations over six epochs from 2012 February to 2013 February at 43 GHz. Quasi-simultaneous Global Millimeter VLBI Array (GMVA) observations at 86 GHz were performed in May 2012. Results. We discover a new jet component at the northeast direction from the core in all the images at 43 and 86 GHz. The new component shows the off-axis location from the persistent jet extending to the southeast. The 43 GHz images reveal that the scattering of the positions of the NE component is within ~0.2 mas. The 86 GHz data reveals a jet component located 0.75 mas southeast of the radio core. We also discuss the spectral indices between 43 and 86 GHz, where the northeast component has steeper spectral index and the southeast component has comparable or flatter index than the radio core does.
dc.language.iso	eng
dc.relation.ispartof	Astronomy and Astrophysics, 2016, vol. 586, num. A113, p. 1-10
dc.subject	Astrofísica
dc.subject	Astronomia
dc.title	Discovery of off-axis jet structure of TeV blazar Mrk 501 with mm-VLBI
dc.type	journal article	es_ES
dc.date.updated	2017-07-04T14:00:53Z
dc.identifier.doi	10.1051/0004-6361/201526541
dc.identifier.idgrec	103178
dc.rights.accessRights	open access	es_ES