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The off-axis jet structure in Mrk 501 at mm-wavelengths

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arxiv 1505.04433 v1 pith:DZQC5ONI submitted 2015-05-17 astro-ph.HE astro-ph.GAhep-ph

The off-axis jet structure in Mrk 501 at mm-wavelengths

Shoko Koyama , Motoki Kino , Marcello Giroletti , Akihiro Doi , Hiroshi Nagai , Kazuhiro Hada , Kotaro Niinuma , Monica Orienti
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Gabriele Giovannini Eduardo Ros Tuomas Savolainen Miguel A. P\'erez-Torres Thomas P. Krichbaum
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classification astro-ph.HE astro-ph.GAhep-ph
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We present results from 43 GHz (VLBA, six epochs from 2012.2 to 2013.2) and 86 GHz (GMVA, one epoch in 2012.4) observations toward the basis of the jet in the TeV Blazar Mrk 501. The 43-GHz data analysis reveals a new feature located northeast of the radio core, with a flux density of several tens of mJy, perpendicularly to the jet axis. The 86-GHz image shows the jet feature located 0.75 mas southeast of the radio core, which is consistent with the previous result. The location of Gaussian model for 0.75 mas feature does not coincide with those for the jets in the 43-GHz image, however, a distribution of emission is found. We also discuss the spectral indices of the core, the northeast feature, and the jet feature between 43 GHz and 86 GHz, which show flat-to-steep, steep, and flat-to-invert, respectively.

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