Results 21 to 30 of about 41,638 (224)
THE ROLE OF RADIO WAVE PROPAGATION EFFECTS IN THE SOLAR CORONA TO INTERPRET THE BEHIND-LIMB BURSTS
Radio Physics and Radio Astronomy, 2016 Purpose: The radio emission propagation of solar radio bursts in the solar corona which sources are located on the far side of the Sun relative to the observer on Earth is studied.
A. A. Stanislavsky
doaj +1 more source
Co-existence of two plasma phases in solar and AGN coronas [PDF]
Serbian Astronomical Journal, 1998 Here we have juxtaposed two distant cosmic locations of the Sun and AGN where neutral hydrogen appears in a close connection with hot coronas. Besides the solar photosphere, chromosphere and prominences where the presence of neutral hydrogen is ...
Kubičela A. +4 more
doaj +1 more source
The SWAP EUV Imaging Telescope Part I: Instrument Overview and Pre-Flight Testing [PDF]
, 2012 The Sun Watcher with Active Pixels and Image Processing (SWAP) is an EUV solar telescope on board ESA's Project for Onboard Autonomy 2 (PROBA2) mission launched on 2 November 2009.
A. De Groof +33 more
core +1 more source
Micro-events in the active and quiet solar corona [PDF]
Advances in Space Research, 2003 The content of hot material in the corona is not constant. Soft X-ray and high-temperature EUV line observations show that new material, apparently heated and evaporated from the chromosphere, is frequently injected into the corona both in active and quiet regions. Active regions are found to exhibit transient brightenings, termed here microflares, due
Benz, Arnold O., Grigis, Paolo C.
openaire +2 more sources
On Stellar Coronae and Solar Active Regions
The Astrophysical Journal, 2000 Based on Yohkoh Soft X-Ray Telescope (SXT) observations of the Sun near peak activity level obtained on 1992 January 6, we search for coronal structures that have emission measure distributions EM(T ) that match the observed stellar coronal emission measure distributions derived for the intermediate-activity stars v Eri (K2 V) and m Boo A (G8 V) from ...
Jeremy J. Drake +4 more
openaire +2 more sources
Extracting the Temperature of a Coronal Loop in the Solar Active Region 11092 [PDF]
Iranian Journal of Astronomy and Astrophysics, 2018 Extracting the temperature of coronal loops is effective in the analysis of solar active region's loops and helps in better understanding of coronal events.
Narges Fathalian
doaj +1 more source
Self-Similar Signature of the Active Solar Corona within the Inertial Range of Solar-Wind Turbulence [PDF]
Physical Review Letters, 2007 We quantify the scaling of magnetic energy density in the inertial range of solar wind turbulence seen in-situ at 1AU with respect to solar activity. At solar maximum, when the coronal magnetic field is dynamic and topologically complex, we find self-similar scaling in the solar wind, whereas at solar mimimum, when the coronal fields are more ordered ...
Kiyani, K. +3 more
openaire +3 more sources
The Absolute Abundance of Iron in the Solar Corona [PDF]
, 2000 We present a measurement of the abundance of Fe relative to H in the solar corona using a technique which differs from previous spectroscopic and solar wind measurements.
Arnaud M. +7 more
core +3 more sources
Nature Communications, 2018 The solar corona heating mechanism is still subject to debate. Here, the authors report that impulsive reconnection can give rise to an active region corona that is compatible with extreme-ultraviolet observations.
Kai E. Yang +3 more
doaj +1 more source
Extreme ultraviolet observations of active regions in the solar corona [PDF]
Symposium - International Astronomical Union, 1968 The coronal features associated with solar active regions can be observed by recording images of the Sun at extreme ultraviolet (XUV) wavelengths. Pinhole cameras have been flown on stabilized sun-pointing ‘Skylark’ rockets to obtain broad-waveband XUV solar images.
openaire +1 more source