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The Structure and Propagation of the Misaligned Jet M87

Mizusawa VLBI Observatory, National Astronomical Observatory of Japan, 2-21-1, Osawa, Mitaka, Tokyo 181-8588, Japan
Academic Editors: Jose L. Gómez, Alan P. Marscher and Svetlana G. Jorstad
Galaxies 2017, 5(1), 2; https://doi.org/10.3390/galaxies5010002
Received: 18 July 2016 / Revised: 10 December 2016 / Accepted: 14 December 2016 / Published: 26 December 2016
(This article belongs to the Special Issue Blazars through Sharp Multi-wavelength Eyes)
Due to its proximity, M87 is a prime target for next-generation high-resolution VLBI at short millimeter wavelengths, by which the jet launching region and the black hole shadow are expected to be resolved and imaged sometime soon. Along with this situation, high-quality VLBI imaging and monitoring at lower frequencies play an important role in complementing the high-frequency data. Here, we present our recent and ongoing observational studies of the M87 jet on pc-to-subpc scales based on ultra-deep VLBI imaging programs at 86 GHz and 15 GHz. The high-dynamic-range images have allowed us to obtain some remarkably improved views on this jet. We also introduce the KVN and VERA Array (KaVA), a new regularly-operating VLBI network in East Asia, which is quite suitable for studying the structure and propagation of relativistic jets. Some early results from our pilot study for M87—including the detection of superluminal motions near the jet base—implying an efficient magnetic-to-kinetic conversion at these scales, are reported. View Full-Text
Keywords: galaxies: active; galaxies: individual (M87); galaxies: jets; radio continuum: galaxies galaxies: active; galaxies: individual (M87); galaxies: jets; radio continuum: galaxies
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Hada, K. The Structure and Propagation of the Misaligned Jet M87. Galaxies 2017, 5, 2.

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