166 citations · 1.3k across the 60 of their papers we have counts for
6 papers · 1 filter
Discovery of a wandering radio jet base after a large X-ray flare in the blazar Markarian 421
K. Niinuma, M. Kino, A. Doi +3
We investigate the location of the radio jet bases ("radio cores") of blazars in radio images, and their stationarity by means of dense very long baseline interferometry (VLBI) obs…
The off-axis jet structure in Mrk 501 at mm-wavelengths
Shoko Koyama, Motoki Kino, Marcello Giroletti +10
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. T…
Key Science Observations of AGNs with KaVA Array
Motoki Kino, Kotaro Niinuma, Guang-Yao Zhao +2
KaVA (KVN and VERA Array) is a new combined VLBI array with KVN (Korean VLBI Network) and VERA (VLBI Exploration of Radio Astrometry). First, we briefly review the imaging capabili…
A strong radio brightening at the jet base of M87 in the period of the elevated TeV gamma-ray state in 2012
K. Hada, M. Giroletti, M. Kino +18
The nearby radio galaxy M87 offers a unique opportunity for exploring the connection between gamma-ray production and jet formation at an unprecedented linear resolution. However,…
Accelerating a water maser face-on jet from a high mass young stellar object
Kazuhito Motogi, Kazuo Sorai, Mareki Honma +6
We report on a long-term single-dish and VLBI monitoring for intermittent flare activities of a Dominant Blue-Shifted HO Maser (DBSM) associated with a southern high mass you…
Probing Precise Location of Radio Core in TeV Blazar Mrk 501 with VERA at 43 GHz
S. Koyama, M. Kino, A. Doi +13
We investigate the position of the radio core in a blazar by multi-epoch astrometric observations at 43 GHz. Using the VLBI Exploration of Radio Astrometry (VERA), we have conducte…