Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Neng-hui Liao"'
Publikováno v:
The Astrophysical Journal Letters, Vol 965, Iss 1, p L2 (2024)
We report on multiwavelength studies of a blazar NVSS J171822+423948, which is identified as the low-energy counterpart of 4FGL J1718.5+4237, the unique γ -ray source known to be cospatial with the IceCube neutrino event IC-201221A. After a 12 yr lo
Externí odkaz:
https://doaj.org/article/dd441d529e89477a967085a3a36bcb2a
Autor:
Hai Lei, Ying-Kang Zhang, Xiong Jiang, S. Kiehlmann, A. C. S. Readhead, Liang Chen, Neng-Hui Liao, Tao An
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 2, p 185 (2024)
High-redshift ( z > 3) γ -ray blazars are rare, but they are crucial for our understanding of jet evolution, γ -ray production and propagation, and the growth of supermassive black holes in the early Universe. A new analysis of Fermi-LAT data revea
Externí odkaz:
https://doaj.org/article/d6044934a78f405090d6d3435c3b1fca
Autor:
Neng-hui Liao
Publikováno v:
Galaxies, Vol 6, Iss 3, p 68 (2018)
Among the highly dynamical non-thermal universe, flashes of γ-ray photons from jets in active galactic nuclei (AGNs) are always attractive. Not only are they extraordinary observational phenomena, but they also become powerful probes of the jets. Be
Externí odkaz:
https://doaj.org/article/762660cc99a049b0b53527fbd6c4787c
Publikováno v:
2012RAA....12.1475F
We collect the 2LAC and MOJAVE quasi-simultaneous data to investigate the radio-gamma connection of blazars. The cross sample contains 166 sources. The statistic analysis based on this sample confirms positive correlations between these two bands, bu
Externí odkaz:
http://arxiv.org/abs/1205.2456
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 521:269-277
GRB 070707 was the first short gamma-ray burst (GRB) detected by INTEGRAL and the optical afterglow was attributed to the prolonged activity of the central engine in the literature. Here, we reanalyse the afterglow data and examine the physical origi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::498d6a7e924fba79dfd386d8c87c9bf0
https://doi.org/10.1093/mnras/stad541
https://doi.org/10.1093/mnras/stad541
Autor:
Neng-Hui Liao, Zhen-Feng Sheng, Ning Jiang, Yu-Ling Chang, Yi-Bo Wang, Dong-Lian Xu, Xin-Wen Shu, Yi-Zhong Fan, Ting-Gui Wang
A radio-emitting tidal disruption event (AT2019dsg) is proposed as a likely counterpart of the IceCube neutrino event IC-191001A. In this work we have revisited the {\it Fermi}-LAT data in the direction of the neutrino and confirmed no signal at the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ad9288f0071849d780936814a017d4d8
Autor:
Lei Lei, Xiang Li, Zhi-Ping Jin, Hao Zhou, P. D'Avanzo, Da-Ming Wei, Neng-Hui Liao, Stefano Covino, Yi-Zhong Fan
Publikováno v:
INSPIRE-HEP
GRB 060505 was the first well-known nearby (at redshift 0.089) "hybrid" gamma-ray burst that has a duration longer than 2 seconds but without the association of a supernova down to very stringent limits. The prompt $\gamma-$ray flash lasting $\sim 4$
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0dbe9d80d5d2e6565030a5472378068e
High-redshift blazars are valuable tools to study the early Universe. So far only a handful of $\gamma$-ray blazars have been found at redshifts above 3. $\gamma$-ray signals are detected in the direction of PMN J2219-2719 ($z=3.63$) and PMN J2321-08
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36fdc1bb25ce6c9cf67d3488cea02feb
http://arxiv.org/abs/2006.10470
http://arxiv.org/abs/2006.10470
GB 1508+5714 is a high-redshift blazar ($z$ = 4.3) and a spectrally soft $\gamma$-ray source has been detected in its direction. By analyzing 11.4-yr {\it Fermi}-LAT data, significant long-term variability of the $\gamma$-ray source is confirmed. Mor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d0a1a952be3c0d2bf9754826464cc62
Publikováno v:
Monthly Notices of the Royal Astronomical Society.
Characterizing the long-term variability of AGNs is a key legacy of RXTE. We carry out a spectral analysis on a sample of 20 Seyfert 1 galaxies, which had been observed by the RXTE for at least 100 times. All 18,335 spectra are fitted in a uniform wa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::890d67152dcc86965f38b6fb289f3ea4
https://doi.org/10.1093/mnras/stz3217
https://doi.org/10.1093/mnras/stz3217