Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Liao, Mai"'
Autor:
Kang, Wen-Yong, Wang, Jun-Xian, Cai, Zhen-Yi, Wang, Hao-Chen, Ren, Wen-Ke, Liao, Mai, Yuan, Feng, Zdziarski, Andrzej, Cao, Xinwu
Quasars are generally divided into jetted radio-loud and non-jetted radio-quiet ones, but why only 10% quasars are radio loud has been puzzling for decades. Other than jet-induced-phenomena, black hole mass, or Eddington ratio, prominent difference b
Externí odkaz:
http://arxiv.org/abs/2406.13169
In this work, we revisit the relationship between [O III] line width $w_{\rm 90}$ (as the indicator of AGN outflow velocity) and the radio emission in RQQs by employing a large sample of Type I quasars ($\sim 37,000$) selected from the Sloan Digital
Externí odkaz:
http://arxiv.org/abs/2401.05212
Compact radio AGN are thought to be young radio active galactic nuclei (AGN) at the early stage of AGN evolution, thus are ideal laboratory to study the high-energy emission throughout the evolution of radio AGN. In this work, we report for the first
Externí odkaz:
http://arxiv.org/abs/2401.03261
Autor:
Aranda, Román Fernández, Santos, Tanio Díaz, Hatziminaoglou, Evanthia, Assef, Roberto J., Aravena, Manuel, Eisenhardt, Peter R. M., Ferkinhoff, Carl, Pensabene, Antonio, Nikola, Thomas, Andreani, Paola, Vishwas, Amit, Stacey, Gordon J., Decarli, Roberto, Blain, Andrew W., Brisbin, Drew, Charmandaris, Vassilis, Jun, Hyunsung D., Li, Guodong, Liao, Mai, Martin, Lee R., Stern, Daniel, Tsai, Chao-Wei, Wu, Jingwen, Zewdie, Dejene
WISE J224607.6-052634.9 (W2246-0526) is a hot dust-obscured galaxy at $z$ = 4.601, and the most luminous obscured quasar known to date. W2246-0526 harbors a heavily obscured supermassive black hole that is most likely accreting above the Eddington li
Externí odkaz:
http://arxiv.org/abs/2401.01871
Autor:
Li, Xiaofeng, Yang, Jun, Cheng, Xiaopeng, Liao, Mai, Hong, Xiaoyu, Dou, Liming, Zhao, Tianle, Fan, Zhongying, Zhang, Fupeng, Huang, Weirong
M60, an elliptical galaxy located 16.5~Mpc away, has an active nucleus with a very low luminosity and an extremely low accretion rate. Its central supermassive black hole has a mass of $M_{\rm BH}\sim4.5\times10^{9}\, M_{\odot}$ and a Schwarzschild r
Externí odkaz:
http://arxiv.org/abs/2311.06126
Dual super massive black holes at sub-kpc to kpc scales, the product of galaxy mergers, are progenitors of eventually coalescing binary SMBHs. If both or one of the dual SMBHs are accreting, they may appear as dual AGNs or off-nucleus AGNs. Studying
Externí odkaz:
http://arxiv.org/abs/2306.03357
Autor:
Yang, Jun, Paragi, Zsolt, Frey, Sándor, Gurvits, Leonid I., Liao, Mai, Liu, Xiang, Cui, Lang, Yang, Xiaolong, Chen, Wen, Varenius, Eskil, Conway, John E., Chen, Rurong, Chang, Ning
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Vol. 520, pp. 5964-5973 (2023)
Dwarf galaxies are characterised by a very low luminosity and low mass. Because of significant accretion and ejection activity of massive black holes, some dwarf galaxies also host low-luminosity active galactic nuclei (AGNs). In a few dwarf AGNs, ve
Externí odkaz:
http://arxiv.org/abs/2302.06214
Autor:
Roy, Abhradeep, Gupta, Alok C., Chitnis, Varsha R., Cellone, Sergio A., Raiteri, Claudia M., Romero, Gustavo E., Wiita, Paul J., Chatterjee, Anshu, Combi, Jorge A., Liao, Mai, Sarkar, Arkadipta, Villata, Massimo
We present a long-term and intraday variability study on optical multiwaveband ($U\!BV\!RI$) data from the blazar AO 0235+164 collected by various telescopes for $\sim$44 years (1975--2019). The blazar was found to be significantly variable over the
Externí odkaz:
http://arxiv.org/abs/2301.01944
To understand the X-ray emission of active galactic nuclei (AGNs), we explored the optical-to-X-ray variation correlation of a radio-loud quasar (RLQ) SDSS J121426.52+140258.9 (hereafter J1214+1402) with multi-epoch observations of Swift and XMM-Newt
Externí odkaz:
http://arxiv.org/abs/2211.13407
The radio emission in radio-quiet quasars (RQQs) has been a long mystery and its physical origin remains unclear. In a previous work we find UV/optical more variable quasars have stronger X-ray emission, indicating a link between disc turbulence and
Externí odkaz:
http://arxiv.org/abs/2201.11529