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Solar quiet- and coronal-hole region coronal jets frequently clearly originate from erupting minifilaments, but active-region jets often lack an obvious erupting-minifilament source. We observe a coronal-jet-productive active region (AR),…

太阳与恒星天体物理 · 物理学 2023-10-24 Alphonse C. Sterling , Ronald L. Moore , Navdeep K. Panesar

Planetary nebulae often have asymmetric shapes, which could arise due to collimated jets from evolved stars before evolution to the planetary nebula phase. The source of jet collimation in these stars is unknown. Magnetic fields are thought…

天体物理学 · 物理学 2009-11-11 W. H. T. Vlemmings , P. J. Diamond , H. Imai

I review recent progress in the theory of relativistic jet production. The presently favored mechanism is an electrodynamic one, in which charged plasma is accelerated by electric fields that are generated by a rotating magnetic field. The…

天体物理学 · 物理学 2007-05-23 David L. Meier

The generation of astrophysically relevant jets, from magnetically collimated, laser-produced plasmas, is investigated through three-dimensional, magneto-hydrodynamic simulations. We show that for laser intensities I ~ 10^12 - 10^14 W/cm^2,…

等离子体物理 · 物理学 2015-06-12 A. Ciardi , T. Vinci , J. Fuchs , B. Albertazzi , C. Riconda , H. Pépin , O. Portugall

We study the properties of the innermost jet of the flat spectrum radio quasar 1633+382 (4C~38.41) based on VLBI data from the radio monitoring observations of the Boston University VLBI program at 43~GHz. Analysis of the components…

星系天体物理 · 物理学 2020-01-08 Juan Carlos Algaba , Bindu Rani , Sang-Sung Lee , Motoki Kino , Jongho Park , Jae-Young Kim

We present the results of multi wavelength, co-spatial and near co-temporal observations of jets above a sunspot light bridge. The data were obtained with the Solar Optical Telescope (SOT) on board Hinode, the Interface Region Spectrograph…

太阳与恒星天体物理 · 物理学 2015-05-12 Lokesh Bharti

We present the results of 2.5-dimensional resistive magnetohydrodynamic (MHD) simulations of the magnetic interaction between a weakly magnetized neutron star and its accretion disk. General relativistic effects are simulated by using the…

天体物理学 · 物理学 2009-11-10 Yoshiaki Kato , Mitsuru Hayashi , Ryoji Matsumoto

We report an observation of a small scale flux-tube that undergoes kinking and triggers the macrospicule and a jet on November 11, 2010 in the north polar corona. The small-scale flux-tube emerged well before the triggering of macrospicule…

太阳与恒星天体物理 · 物理学 2015-06-15 P. Kayshap , A. K. Srivastava , K. Murawski , D. Tripathi

We review recent theoretical developments in the study of the structure of jets that are produced in ultra relativistic heavy ion collisions. The core of the review focusses on the dynamics of the parton cascade that is induced by the…

高能物理 - 唯象学 · 物理学 2015-12-09 Jean-Paul Blaizot , Yacine Mehtar-Tani

Extreme-ultraviolet and X-ray jets occur frequently in magnetically open coronal holes on the Sun, especially at high solar latitudes. Some of these jets are observed by white-light coronagraphs as they propagate through the outer corona…

太阳与恒星天体物理 · 物理学 2017-03-15 Vadim M. Uritsky , Merrill A. Roberts , C. Richard DeVore , Judith T. Karpen

We present and discuss multi-wavelength observations of five homologous recurrent solar jets that occurred in active region NOAA 11133 on 11 December, 2010. These jets were well observed by the Solar Dynamic observatory (SDO) with high…

太阳与恒星天体物理 · 物理学 2015-06-23 Ramesh Chandra , G. R. Gupta , Sargam Mulay , Durgesh Tripathi

We investigate the acceleration source of the impulsive solar energetic particle (SEP) events on 2007 January 24. Combining the in situ electron measurements and remote-sensing solar observations, as well as the calculated magnetic fields…

太阳与恒星天体物理 · 物理学 2013-05-27 C. Li , S. A. Matthews , L. van Driel-Gesztelyi , J. Sun , C. J. Owen

We use data from the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO) to study the most likely formation of a forced reconnection region and associated plasma blobs, triggered by jet-like structures in a…

太阳与恒星天体物理 · 物理学 2025-02-19 Sudheer K. Mishra , A. K. Srivastava , S. P. Rajaguru , P. Jelínek

After being launched, GRB jets propagate through dense media prior to their breakout. The jet-medium interaction results in the formation of a complex structured outflow, often referred to as a "structured jet". The underlying physics of…

高能天体物理现象 · 物理学 2020-11-18 Ore Gottlieb , Ehud Nakar , Omer Bromberg

Observations of coronal jets increasingly suggest that local fragmentation and intermittency play an important role in the dynamics of these events. In this work we investigate this fragmentation in high-resolution simulations of jets in…

太阳与恒星天体物理 · 物理学 2016-08-17 P. F. Wyper , C. R. DeVore , J. T. Karpen , B. J. Lynch

Intensity bursts in ultraviolet (UV) to X-ray wavelengths and plasma jets are typical signatures of magnetic reconnection and the associated impulsive heating of the solar atmospheric plasma. To gain new insights into the process,…

太阳与恒星天体物理 · 物理学 2021-12-15 L. P. Chitta , S. K. Solanki , H. Peter , R. Aznar Cuadrado , L. Teriaca , U. Schühle , F. Auchère , D. Berghmans , E. Kraaikamp , S. Gissot , C. Verbeeck

We examine models in which jets are responsible for the formation of the emission-line spiral structure in IRAS 04210+0400. The kiloparsec-scale radio lobes in this active galaxy appear to be related to its extended emission-line spiral…

天体物理学 · 物理学 2015-06-24 W. Steffen , A. J. Holloway , A. Pedlar

In this paper, we present the detailed analysis of recurrent homologous jets originating from an emerging negative magnetic flux at the edge of an Active Region. The observed jets show multi-thermal features. Their evolution shows high…

太阳与恒星天体物理 · 物理学 2018-01-15 Jiajia Liu , Yuming Wang , Robertus Erdelyi , Rui Liu , Scott W. McIntosh , Tingyu Gou , Jun Chen , Kai Liu , Lijuan Liu , Zonghao Pan

We report the observation of an X-class long-duration flare which is clearly confined. It appears as a compact-loop flare in the traditional EUV passbands (171 and 195 {\AA}), but in the passbands sensitive to flare plasmas (94 and 131…

太阳与恒星天体物理 · 物理学 2014-07-01 Rui Liu , Viacheslav S. Titov , Tingyu Gou , Yuming Wang , Kai Liu , Haimin Wang

It is well-known that extreme ultraviolet emission emitted at the solar surface is absorbed by overlying cool plasma. Especially in active regions dark lanes in EUV images suggest that much of the surface activity is obscured. Simultaneous…

太阳与恒星天体物理 · 物理学 2016-12-14 N. -H. Chen , D. E. Innes
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