4 papers
A Jet from a Nearly Dormant Black Hole
Xiaopeng Cheng, Hai Yang, Jun Yang +11
Most galaxies host supermassive black holes (SMBHs) that remain weakly accreting or dormant for much of their lifetimes. At the lowest accretion rates, these systems may represent…
A Radio Changing-state Jet in the Narrow-line Seyfert 1 Galaxy J1105+1452
Liming Dou, Zhining Chen, Jiahua Wu +9
We report the discovery of a radio-quiet to radio-loud transition in the narrow-line Seyfert 1 galaxy J1105+1452. The source has undergone a long-term evolution from a radio-quiet…
Resolving the black hole sphere of influence in a hyper-luminous obscured quasar at redshift 4.6
Mai Liao, Roberto J. Assef, Chao-Wei Tsai +17
Supermassive black holes (SMBHs) imprint gravitational signatures on the matter within their sphere of influence (SoI). Nuclear gas dynamics can hence be used to accurately measure…
The orbital period of the long-period and colliding-wind binary WR 146 from radio interferometry of the shock cone
Shiming Wen, Bo Zhang, Shuangjing Xu +8
We report the first measurement of the orbital period of a long-period colliding-wind binary (CWB) system WR 146, derived by tracing the rotational morphology of its wind-colliding…