Results 21 to 30 of about 353,818 (294)
EMISSION MEASURE DISTRIBUTION FOR DIFFUSE REGIONS IN SOLAR ACTIVE REGIONS [PDF]
The Astrophysical Journal, 2014 Our knowledge of the diffuse emission that encompasses active regions is very limited. In the present paper we investigate two off-limb active regions, namely AR10939 and AR10961, to probe the underlying heating mechanisms. For this purpose we have used spectral observations from Hinode/EIS and employed the emission measure (EM) technique to obtain the
Subramanian, Srividya +3 more
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The Astrophysical Journal, 2023 The nonassociation of coronal mass ejections with high energetic flares is sparse. For this reason, the magnetic conditions required for the confinedness of major flares is a topic of active research.
N. Vasantharaju +3 more
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Physics of outflows near solar active regions [PDF]
Annales Geophysicae, 2015 Hinode/EIS observations have revealed outflows near active regions which remain unexplained. An outflow region observed by the EUV Imaging Spectrometer (EIS) that appears slightly redshifted at low temperatures and blueshifted at higher temperatures ...
D. J. Price, Y. Taroyan
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The Magnetic Classification of Solar Active Regions 1992 - 2015
, 2016 The purpose of this letter is to address a blind-spot in our knowledge of solar active region statistics. To the best of our knowledge there are no published results showing the variation of the Mount Wilson magnetic classifications as a function of ...
Jaeggli, Sarah A., Norton, Aimee A.
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Solar active regions in Mg II light [PDF]
Symposium - International Astronomical Union, 1968 During 1965 two rockets were launched in order to obtain monochromatic pictures of the Sun in the Mg II line at 2802·7 Å. The Mg II filterheliograms have been compared with simultaneous Hα and Ca II K spectroheliograms. An important observation from both flights concerns the relative intensities of different active regions. In the Hα pictures there are
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Cooperative Study of Solar Active Regions [PDF]
Symposium - International Astronomical Union, 1968 The ‘Cooperative Study of Solar Active Regions’ (or CSSAR) originated from a suggestion of E. R. Mustel at the IQSY General Assembly in Rome, 1963. Later on it was also endorsed by IAU Commission 10, and a special Working Group of this Commission, under chairmanship of the writer, had the duty to organize this project, an experiment in both solar ...
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Time-Distance Imaging of Solar Far-Side Active Regions
, 2007 It is of great importance to monitor large solar active regions in the far-side of the Sun for space weather forecast, in particular, to predict their appearance before they rotate into our view from the solar east limb. Local helioseismology techniques,
Duvall T. L., Jr., Junwei Zhao
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Magnetic Reconnection between a Solar Jet and a Filament Channel
The Astrophysical JournalThe solar corona is highly structured by bunches of magnetic field lines forming either loops, or twisted flux ropes representing prominences/filaments, or very dynamic structures such as jets.
Garima Karki +6 more
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The Astrophysical Journal, 2023 We analyzed changes in the height of the coronal hard X-ray (HXR) source for flares SOL2013-05-13T01:50 and SOL2013-05-13T15:51. Analysis of the Reuven Ramaty High Energy Solar Spectroscopic Imager data revealed the downward motion of the HXR source and ...
Alexander N. Shabalin +2 more
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Solar Microwave Emission in Active Regions [PDF]
Symposium - International Astronomical Union, 1985 Multi–frequency Observations of Solar Microwave bursts recorded during solar maximum period 1980–81 are analysed and compared with x–ray data for studying the nature of microwave emissions from active regions. Most of the microwave burst spectra showed that the spectral index below the peak frequency is always less than 2.The magneto-ionic conditions ...
B. Lokanadham +4 more
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