Results 61 to 70 of about 101,045 (324)

Activity in Galaxies and Quasars [PDF]

The Astrophysical Journal, 1972
Activity in galaxies and quasars is interpreted in terms of plasma processes occurring in the magnetosphere of a certain magnetoid model. This magnetoid comprises a core and an annulus rotating about a common axis with different angular velocities. The magnetic field linking the core to the annulus may begin in an initial current-free state but will be
P. A. Sturrock, C. Barnes
openaire   +2 more sources

Proton Acceleration with Relativistic Electromagnetic Shock

Advanced Science, EarlyView.
New Ion Acceleration Mechanism! A novel cosmic‐ray proton acceleration mechanism is proposed, where relativistic electromagnetic shocks accelerate protons transversely. Hamiltonian analysis yields a scaling law linking the proton energy to the minimum longitudinal thickness of the shock.
Ting Xiao, Xiaomei Zhang, Fanqiu Kong, Xiaolong Zheng, Zheng Gong, Baifei Shen   +5 more
wiley   +1 more source

SEDs and Beaming Effect for Fermi Blazars [PDF]

Journal of Astronomy and Space Sciences, 2016
In this work, based on our previous calculations of spectral energy distributions for a sample of Fermi blazars (Fan et al. 2015a), we calculated the radio loudness and performed correlation analyses.
Jun-Hui Fan, Jiang-He Yang, Yi Liu, Yu-Hai Yuan, Cao Lin, Hu-Bing Xiao   +5 more
doaj   +1 more source

Compact jets as probes for sub-parsec scale regions in AGN

, 2007
Compact relativistic jets in active galactic nuclei offer an effective tool for investigating the physics of nuclear regions in galaxies. The emission properties, dynamics, and evolution of jets in AGN are closely connected to the characteristics of the ...
A. Celotti, A. Königl, A. Königl, A. Merloni, A. Pedlar, A.B. Peck, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Marscher, A.P. Marscher, A.P. Marscher, Andrei Lobanov, C.G. Mundell, D.J. Hutter, D.L. Meier, D.L. Meier, G.B. Field, H.C. Spruit, H.J. Lehto, H.R. Klöckner, I.V. Igumenschev, J.A. Zensus, J.E. Conway, J.F.C. Wardle, J.R. Goicoechea, K. Hirotani, M. Camenzind, M. Hujeirat, M. Sikora, M.J. Valtonen, N. Vlahakis, N.S. Kardashev, P.B. Ivanov, P.B. Ivanov, R.C. Walker, R.D. Blandford, R.D. Blandford, S. Koide, S.D. Bloom, S.S. Komissarov, S.V. Bogovalov, T.G. Arshakian, U. Bach, W. Junor   +49 more
core   +1 more source

Photovoltaic and Photomultiplication Dual‐Mode Near‐Infrared Organic Detectors with Large Dynamic Range for Intensive and Faint Light Sensing

Advanced Science, EarlyView.
A photovoltaic/photomultiplication dual‐mode organic photodetector is developed by integrating two different organic bulk‐heterojunctions, one introduces the photovoltaic effect, and the other triggers photomultiplication charge generation in the stacked device at different voltage polarities.
Xin Hu, Ning Li, Mingyang Ren, Yifan Ji, Hongmei Guo, Qian Chen, Xiubao Sui   +6 more
wiley   +1 more source

Observational Evidence for a Correlation between the Magnetic Field of Jets and Star Formation Rate in Host Galaxies

The Astrophysical Journal
Accretion supermassive black holes in the center of active galaxies usually produce “jet”-collimated bipolar outflows of relativistic particles. Magnetic fields near the black hole event horizon may play a crucial role in the formation of jets/outflows ...
Yongyun Chen, Qiusheng Gu, Junhui Fan, Xiaotong Guo, Xiaoling Yu, Nan Ding, Dingrong Xiong   +6 more
doaj   +1 more source

The triggering probability of radio-loud AGN: A comparison of high and low excitation radio galaxies in hosts of different colors [PDF]

, 2012
Low luminosity radio-loud active galactic nuclei (AGN) are generally found in massive red elliptical galaxies, where they are thought to be powered through gas accretion from their surrounding hot halos in a radiatively inefficient manner.
Abazajian, Baldwin, Balogh, Becker, Best, Best, Best, Best, Brinchmann, Condon, Croton, Evans, H. J. A. Röttgering, Hardcastle, Hickox, J. Brinchmann, Kauffmann, Kauffmann, Kauffmann, Martin, Matthews, P. N. Best, R. M. J. Janssen, Schmidt, Stoughton, Strateva, Strauss, Tadhunter, Tasse, Whysong, York   +30 more
core   +3 more sources

Multifunctional Chiral Halide Perovskites: Advancing Chiro‐Optics, Chiro‐Optoelectronics, and Spintronics

Advanced Science, EarlyView.
This review spotlights key advances in chiral halide perovskite materials and devices, covering device architectures, fabrication methods, and emerging applications like circularly polarized light functions, neuromorphic computing, and spintronics. It explores structure‐property relationships and chirality transfer mechanisms, discusses challenges in ...
Qi Liu, Hui Ren, Qi Wei, Mingjie Li
wiley   +1 more source

The Seyfert-Starburst Connection in X-rays. II. Results and Implications [PDF]

, 2000
We present the results of X-ray imaging and spectroscopic analysis of a sample of Seyfert 2 galaxies that contain starbursts, based on their optical and UV characteristics. These composite galaxies exhibit extended, soft, thermal X-ray emission, which we
Awaki H., Green P. J., K. A. Weaver, Kukula M. J., Laurikainen E., Maiolino R., Malaguti G., Mas-Hesse J. M., Matt G., Matt G., N. A. Levenson, Nandra K., Pedlar A., Risaliti G., Sansom A. E., T. M. Heckman, Unger S. W.   +16 more
core   +2 more sources

The Effect of Immersion Technology on the Quality of Life in Older Adults: A Systematic Review

AGING MEDICINE, EarlyView.
Immersive technologies, especially virtual reality (VR), significantly improve the quality of life for older adults by enhancing physical health, cognitive function, and psychological well‐being. These technologies can be adapted to meet individual needs, making them an effective tool for addressing the challenges of aging.
Solmaz Sohrabei, Vahideh Zolfaghari, Seyed Jafar Ehsanzadeh   +2 more
wiley   +1 more source