Results 101 to 110 of about 282 (177)
UEG Week 2024 Oral Presentations
United European Gastroenterology Journal, Volume 12, Issue S8, Page 9-200, October 2024.
wiley +1 more source
The Astrophysical Journal Supplement SeriesBlazars are a subject of intense debate, specifically regarding their jet launch and emission mechanisms, and the origins of their γ -ray radiation.
Lixia Zhang +7 more
doaj +1 more source
Electromagnetic counterparts to massive black-hole mergers. [PDF]
Living Rev Relativ, 2022 Bogdanović T, Miller MC, Blecha L.
europepmc +1 more source
Revisiting the Fundamental Planes of Black Hole Activity for Strong Jet Sources
The Astrophysical JournalWhether the X-ray emissions of strong jet sources originate from disk+coronas or jets is still controversial. In this work, we constructed a strong jet sample containing 50 flat-spectrum radio quasars, 51 low-synchrotron-peaked BL Lac objects, and 18 ...
Qing-Chen Long +3 more
doaj +1 more source
Testing general relativity with cosmological large scale structure. [PDF]
Gen Relativ Gravit, 2022 Durrer R.
europepmc +1 more source
Radiative Relativistic Turbulence as an In Situ Pair-plasma Source in Blazar Jets
The Astrophysical JournalAs powerful gamma-ray engines, blazars—relativistic plasma jets launched toward Earth from active galactic nuclei—are manifestly high-energy particle accelerators.
John M. Mehlhaff +2 more
doaj +1 more source
Hunting for Candidates of Changing-look Blazars Using Mclust Clustering Analysis
The Astrophysical JournalChanging-look blazars (CLBs) are blazars whose optical spectral lines at different epochs show significant changes and present a clear transition between standard FSRQ and BL Lacertae (BL Lac).
Shi-Ju Kang +3 more
doaj +1 more source
Optical Spectropolarimetric Variability Properties in Blazars PKS 0637–75 and PKS 1510–089
The Astrophysical JournalSpectropolarimetry is a powerful tool to investigate the central regions of active galactic nuclei (AGNs) as polarization signatures are key to probing magnetic field structure, evolution, and the physics of particle acceleration in jets.
Stephanie A. Podjed +4 more
doaj +1 more source
The Physical Properties of Changing-look Blazars
The Astrophysical JournalChanging-look active galactic nuclei (AGNs) are a special class of AGNs that change their spectral type from type 1 to type 2 or vice versa. In recent years, a number of changing-look blazars (CLBs) were also reported, which transition between flat ...
Shi-Ju Kang +4 more
doaj +1 more source
The Astrophysical JournalWe report the discovery of a significant quasiperiodic oscillation (QPO) in the X-ray emission of the TeV blazar 1ES 1959+650 through a detailed timing analysis of long-term Swift X-ray Telescope data.
Bing-Kai Zhang, Min Jin, Peng Zong
doaj +1 more source