Results 1 to 10 of about 5,829 (228)
Flare differentially rotates sunspot on Sun’s surface [PDF]
Nature Communications, 2016 AbstractSunspots are concentrations of magnetic field visible on the solar surface (photosphere). It was considered implausible that solar flares, as resulted from magnetic reconnection in the tenuous corona, would cause a direct perturbation of the dense photosphere involving bulk motion.
Gary, Dale +19 more
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The Association of Flares to Cancelling Magnetic Features on the Sun [PDF]
Solar Physics, 1989 AbstractPrevious work relating flares to evolutionary changes of photospheric solar magnetic fields are reviewed and reinterpreted in the light of recent observations of cancelling magnetic fields. In line-of-sight magnetograms and H-alpha filtergrams from Big Bear Solar Observatory, we confirm the following 3 associations: (a) the occurrence of many ...
Silvia H. B. Livi +3 more
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The Sun as an X‐Ray Star. III. Flares [PDF]
The Astrophysical Journal, 2001 32 pages, 8 figures, 3 ...
Reale, F., Peres, G., Orlando, S.
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Bombs and Flares at the Surface and Lower Atmosphere of the Sun [PDF]
The Astrophysical Journal, 2017 Abstract A spectacular manifestation of solar activity is the appearance of transient brightenings in the far wings of the Hα line, known as Ellerman bombs (EBs). Recent observations obtained by the Interface Region Imaging Spectrograph have revealed another type of plasma “bombs” (UV bursts) with high temperatures of perhaps up to 8 ...
V. H. Hansteen +5 more
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Directionality of Flare-accelerated -Particles at the Sun [PDF]
The Astrophysical Journal, 2003 The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) has observed the 7Be and 7Li γ-ray lines from fusion of accelerated α-particles with ambient helium produced during the 2002 July 23 solar flare that erupted at a heliocentric angle of 73°. This is the first observation of the lines with a germanium spectrometer.
Gerald H. Share +5 more
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Flares on the Sun and on other stars
Astronomy & Geophysics, 2019 Timothy Duckenfield and Anne-Marie Broomhall report from a meeting that explored the synergy between solar and stellar flares.
Timothy Duckenfield +1 more
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Evidence of Flaring in a Transequatorial Loop on the Sun [PDF]
The Astrophysical Journal, 2003 We present evidence of flaring behavior in a transequatorial loop (TEL) that lights up in soft X-rays on 2000 July 13. The large loop structure connects NOAA Active Regions 9070/9066 in the northern hemisphere and AR 9069/9068 in the southern hemisphere.
Louise K. Harra +2 more
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ON THE FLARE INDUCED HIGH-FREQUENCY GLOBAL WAVES IN THE SUN [PDF]
The Astrophysical Journal, 2010 Recently, Karoff and Kjeldsen (2008) presented evidence of strong correlation between the energy in the high-frequency part (5 ...
Kumar, Brajesh +3 more
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Flares on the Sun : Selected Results from SMM [PDF]
International Astronomical Union Colloquium, 1983 Observationally the study of solar flares has reached the stage where intensity-time distributions of emission over broad and resolved regions of the electromagnetic spectrum are obtained for spatially resolved parts of the flare. Polarization measurements add an important diagnostic tool in some wavebands but we shall not report on these here.
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Evidence That Solar Flares Drive Global Oscillations in the Sun [PDF]
The Astrophysical Journal, 2008 Solar flares are large explosions on the Sun's surface caused by a sudden release of magnetic energy. They are known to cause local short-lived oscillations travelling away from the explosion like water rings. Here we show that the energy in the solar acoustic spectrum is correlated with flares.
Karoff, Christoffer; id_orcid 0000-0003-2009-7965 +1 more
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