Results 111 to 120 of about 280,119 (256)

Fast X-Ray Variability from the Coronae of Supermassive Black Holes

The Astrophysical Journal Letters
We present the first systematic study of short-timescale X-ray variability in radio-quiet active galactic nuclei (AGN), utilizing archival Chandra observations of approximately 3000 broad-line AGN selected from the Sloan Digital Sky Survey and Dark ...
Xiurui Zhao, Luca Comisso, Stefano Marchesi, Marco Ajello, Elias Kammoun, Yue Shen, Qiaoya Wu   +6 more
doaj   +1 more source

Observations of coronal holes with the Siberian Radioheliograph

Solar-Terrestrial Physics
Multi-wavelength observations of a coronal hole (CH) with two-dimensional spatial resolution have been made for the first time in the frequency range from 2.8 to 12 GHz.
Globa M. V., Meshalkina N. S., Sych R. A.   +2 more
doaj   +1 more source

Probing Upflowing Regions in the Quiet Sun and Coronal Holes. [PDF]

Sol Phys, 2021
Schwanitz C, Harra L, Raouafi NE, Sterling AC, Moreno Vacas A, Del Toro Iniesta JC, Orozco Suárez D, Hara H.   +7 more
europepmc   +1 more source

Relating near-Earth observations of an interplanetary coronal mass ejection to the conditions at its site of origin in the solar corona [PDF]

, 2005
A halo coronal mass ejection (CME) was detected on January 20, 2004. We use solar remote sensing data (SOHO, Culgoora) and near-Earth in situ data (Cluster) to identify the CME source event and show that it was a long duration flare in which a magnetic ...
Fazakerley, AN, Fazakerley, Andrew N., Culhane, J. Leonard, Mazelle, C., Balogh, A., Matthews, SA, van Driel-Gesztelyi, Lidia, Lucek, E., Reme, H, Owen, Chris J., Harra, LK, Harra, Louise K., Owen, CJ, Lucek, E, van Driel-Gesztelyi, L, Balogh, A, Culhane, JL, Matthews, Sarah A., Mazelle, C, Reme, H.   +19 more
core  

Multi-Thermal Segmentation of Solar Coronal Holes

, 2016
Here we present a poster describing a new multi-thermal segmentation method, to extract coronal boundaries from that of the quiet Sun.Our method uses 3 wavebands (171A, 193A and 211A) to exctract coronal holes and their ...
Peter Gallagher (99110), Tadhg Garton (1375854)   +1 more
core   +1 more source

Fast magnetoacoustic wave trains in coronal holes [PDF]

, 2014
Context. Rapidly propagating coronal EUV disturbances recently discovered in the solar corona are interpreted in terms of guided fast magnetoacoustic waves. Fast magnetoacoustic waves experience geometric dispersion in waveguides, which causes localised,
V. M. Nakariakov, D. J. Pascoe, Pascoe, D. J. (David J.), E. G. Kupriyanova, Kupriyanova, E. G., Nakariakov, V. M. (Valery M.)   +5 more
core   +1 more source

Arthroscopic Superior Capsule Reconstruction Using Hamstring Allograft in V‐Shaped Configuration

Arthroscopy Techniques, EarlyView.
Abstract Massive irreparable rotator cuff tears remain a challenge for the orthopaedic surgeon a great spectrum from conservative to surgical procedures have been described. Superior capsular reconstruction is an option in active young patients with massive irreparable rotator cuff tears without arthritis, which reduce the humeral head superior ...
Hernando Canal Torres, Valeria Latorre Jaramillo, Luis Alfredo Moreno, Rodrigo Lopez, Gustavo Chavarro, Ricardo González, Fabio Restrepo   +6 more
wiley   +1 more source

Elemental Abundances at Coronal Hole Boundaries as a Means to Investigate Interchange Reconnection and the Solar Wind

The Astrophysical Journal
The origin of the slow solar wind is not well understood, unlike the fast solar wind that originates from coronal holes. In situ elemental abundances of the slow solar wind suggest that it originates from initially closed field lines that become open ...
Alexandros Koukras, Daniel W. Savin, Michael Hahn   +2 more
doaj   +1 more source

The non-negligible effect of magnetic holes on the magnitude-of-B magnetic power spectral density of the fast Alfvenic coronal-hole-origin solar wind at 1 AU

Frontiers in Astronomy and Space Sciences
To estimate the effects of magnetic holes on the magnitude of B magnetic power spectral density, a 2-day interval of fast coronal-hole-origin plasma at 1 AU is examined. The magnetic holes are identified and removed from the magnetic time series, and the
Joseph E. Borovsky, Charles W. Smith
doaj   +1 more source

Microwave Bright Points with Multiple Periodic Oscillations in the Solar Polar Coronal Hole during Solar Cycle Minimum

The Astrophysical Journal
During solar cycle minimum, polar coronal holes show a prominent radio brightening cap. The analysis of polar microwave enhanced radiation in polar coronal holes is helpful for understanding the magnetic field characteristics and the origin of the solar ...
Jing Huang, Satoshi Masuda, Baolin Tan, Yin Zhang, Shangbin Yang, Shuhong Yang, Yuanyong Deng   +6 more
doaj   +1 more source