Zobrazeno 1 - 10
of 119
pro vyhledávání: '"Zhou, Minhua"'
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:
Chen, Sina, Kharb, Preeti, Sasikumar, Silpa, Nandi, Sumana, Berton, Marco, Jarvela, Emilia, Laor, Ari, Behar, Ehud, Foschini, Luigi, Vietri, Amelia, Gu, Minfeng, La Mura, Giovanni, Crepaldi, Luca, Zhou, Minhua
We present new 1.5-8.5 GHz Very Long Baseline Array (VLBA) observations and 0.32-1.26 GHz Giant Meterwave Radio Telescope (GMRT) observations of J0354-1340, which is the only known radio-quiet (RQ) or radio-intermediate (RI) narrow-line Seyfert 1 gal
Externí odkaz:
http://arxiv.org/abs/2312.13351
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
Publikováno v:
A&A 663, L4 (2022)
Aims. Active galactic nuclei (AGNs) with EUV deficit are suggested to be powered by a MAD surrounding the black hole, where the slope of EUV spectra ($\alpha_{\rm EUV}$) is found to possess a well positive relationship with the jet efficiency. In thi
Externí odkaz:
http://arxiv.org/abs/2206.14378
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
Publikováno v:
Zhongguo quanke yixue, Vol 26, Iss 28, Pp 3573-3584 (2023)
Background Community-based intervention is an important part of palliative care for advanced cancer patients. However, its role in the health management of advanced cancer patients remains to be supported by medical evidence. Objective To evaluate th
Externí odkaz:
https://doaj.org/article/52bce10584e14916a14b7040bee34d52
Autor:
Zhou, Minhua, Gu, Minfeng
We present the study on the X-ray emission for a sample of radio-detected quasars constructed from the cross-matches between SDSS, FIRST catalogs and XMM-Newton archives. A sample of radio-quiet SDSS quasars without FIRST radio detection is also asse
Externí odkaz:
http://arxiv.org/abs/2007.01049
In this work, we investigated the X-ray emission for a sample of young radio AGNs by combining their data from Chandra/XMM-Newton and at other wavebands. We find strong correlations between the X-ray luminosity $L_{\rm X}$ in 2$-$10 keV and the radio
Externí odkaz:
http://arxiv.org/abs/2006.01079
Autor:
Zhou, Minhua, Gu, Minfeng
The reason for the difference in the composite X-ray spectrum between radio-loud quasars (RLQs) and radio-quiet quasars (RQQs) is still unclear. To study this difference, we built a new composite X-ray spectrum of RLQs by using Chandra X-ray data and
Externí odkaz:
http://arxiv.org/abs/2003.03535