Multifrequency VLBI Observations of the Broad Absorption Line Quasar J1020+4320: Recently Restarted Jet Activity?

被引：7

作者：

Doi, Akihiro ^{[1
,2
]}

Murata, Yasuhiro ^{[1
,2
]}

Mochizuki, Nanako ^{[1
]}

Takeuchi, Hiroshi ^{[1
]}

Asada, Keiichi ^{[3
]}

Hayashi, Takayuki J. ^{[4
,5
]}

Nagai, Hiroshi ^{[6
]}

Shibata, Katsunori M. ^{[4
]}

Oyama, Tomoaki ^{[4
]}

Jike, Takaaki ^{[4
]}

Fujisawa, Kenta ^{[7
,8
]}

Sugiyama, Koichiro ^{[9
]}

Ogawa, Hideo ^{[10
]}

Kimura, Kimihiro ^{[10
]}

Honma, Mareki ^{[4
,11
]}

Kobayashi, Hideyuki ^{[4
,5
]}

Koyama, Shoko ^{[4
,5
]}

机构：

[1] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuou Ku, Sagamihara, Kanagawa 2298510, Japan

[2] Grad Univ Adv Studies, Dept Space & Astronaut Sci, Chuou Ku, Sagamihara, Kanagawa 2298510, Japan

[3] Acad Sinica, Inst Astron & Astrophys, Taipei 10617, Taiwan

[4] Natl Astron Observ Japan, Mizusawa VLBI Observ, Mitaka, Tokyo 1818588, Japan

[5] Univ Tokyo, Dept Astron, Bunkyo Ku, Tokyo 1130033, Japan

[6] Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan

[7] Yamaguchi Univ, Dept Phys, Fac Sci, Yamaguchi 7538512, Japan

[8] Yamaguchi Univ, Res Inst Time Studies, Yamaguchi 7538511, Japan

[9] Yamaguchi Univ, Grad Sch Sci & Engn, Yamaguchi 7538512, Japan

[10] Osaka Prefecture Univ, Dept Phys Sci, Naka Ku, Sakai, Osaka 5998531, Japan

[11] Grad Univ Adv Studies, Dept Astron Sci, Mitaka, Tokyo 1818588, Japan

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2013年 / 65卷 / 03期

基金：

日本学术振兴会; 美国国家科学基金会;

关键词：

galaxies: active; galaxies: jets; galaxies: quasars: absorption lines; galaxies: quasars: individual (SDSS J102027.20+432056.2); radio continuum: galaxies; DIGITAL SKY SURVEY; COMPACT STEEP-SPECTRUM; HIGH-FREQUENCY PEAKERS; RADIO-SOURCE EVOLUTION; GALACTIC NUCLEI; POLARIZATION PROPERTIES; RELATIVISTIC JET; BRIGHT SAMPLE; DATA RELEASE; DISK WINDS;

D O I：

10.1093/pasj/65.3.57

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

This paper reports on very-long-baseline interferometry observations of the radio-loud broad absorption line (BAL) quasar J1020+4320 at 1.7, 2.3, 6.7, and 8.4 GHz using the Japanese VLBI network (JVN) and European VLBI network (EVN). The radio morphology is compact with a size of similar to 10 pc. The convex radio spectrum has been stable over the last decade; an observed peak frequency of 3.2 GHz is equivalent to 9.5 GHz in the rest frame, suggesting an age on the order of similar to 100 years as a radio source, according to an observed correlation between the linear size and the peak frequency of compact steep spectrum (CSS) and giga-hertz peaked spectrum (GPS) radio sources. A low-frequency radio excess suggests a relic of past jet activity. J1020+4320 may be one of the quasars with recurrent and short-lived jet activity during a BAL-outflowing phase.

引用

页数：6