VERA monitoring of the radio jet 3C 84 in the period of 2007–2013: Detection of non-linear motion

PASJ: Publications of the Astronomical Society of Japan

Hiura, Koichiro¹  Chida, Hikaru¹  Akiyama, Kazunori²  Giroletti, Marcello³  Orosz, Gabor⁴  D’Ammando, Filippo⁵  Sorai, Kazuo⁶  Sawada-Satoh, Satoko⁷  Orienti, Monica⁷  Niinuma, Kotaro⁸  Koyama, Shoko⁹  Kino, Motoki^1,10  Nagai, Hiroshi^1,10  Hada, Kazuhiro^1,10  Honma, Mareki^1,11  Giovannini, Gabriele^1,12 

[1] Department of Cosmosciences, Graduate School of Science, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan;Department of Physics, Faculty of Science, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan;Department of Physics, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan;Dipartimento di Fisica e Astronomia, Università di Bologna, Via Gobetti, 93/2, I-40127 Bologna, Italy;Division of Physics, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan;Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, Yamaguchi 753-8512, Japan;INAF Istituto di Radioastronomia, via Gobetti 101, I-40129 Bologna, Italy;Kogakuin University, Academic Support Center, 2665-1 Nakano, Hachioji, Tokyo 192-0015, Japan;Massachusetts Institute of Technology, Haystack Observatory, Westford, MA 01886, USA;National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan;National Radio Astronomy Observatory, 520 Edgemont Rd, Charlottesville, VA 22903, USA;Tomonaga Center for the History of the Universe (TCHoU), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan

关键词: galaxies: active;    galaxies: individual;    galaxies: jets;    radio continuum: galaxies;   

DOI  :  10.1093/pasj/psy078

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

We present a kinematic study of the sub-parsec-scale radio jet of the radio galaxy 3C 84/NGC 1275 with the VLBI Exploration of Radio Astrometry (VERA) array at 22 GHz for 80 epochs from 2007 October to 2013 December. The averaged radial velocity of the bright component “C3” with reference to the radio core is found to be 0.27 ± 0.02 c between 2007 October and 2013 December. This constant velocity of C3 is naturally explained by the advancing motion of the head of the mini-radio lobe. We also find a non-linear component in the motion of C3 with respect to the radio core. We briefly discuss possible origins of this non-linear motion.

【 授权许可】

CC BY