نتایج جستجو برای: corona wind
تعداد نتایج: 96504 فیلتر نتایج به سال:
Generalized Squashing Factors for Covariant Description of Magnetic Connectivity in the Solar Corona
The study of magnetic connectivity in the solar corona reveals a need to generalize the field line mapping technique to arbitrary geometry of the boundaries and systems of coordinates. Indeed, the global description of the connectivity in the corona requires the use of the photospheric and solar wind boundaries. Both are closed surfaces and therefore do not admit a global regular system of coor...
the west of esfahan province, iran, is one of the most important agricultural areas throughout the country due to the climate variability and life-giving water of zayanderood river. rice is one of the major and economic crops in this area. the most important climatic elements in agricultural activities which should be considered include temperature, relative humidity, precipitation and wind. so...
Context. Recent studies of the solar wind sunward 0.25 AU reveal that it contains quiescent regions, with low-amplitude plasma and magnetic field fluctuations, a direction similar to Parker spiral. The regions are thought have more direct connection corona than other types wind, suggesting waves or instabilities in indicative early evolution as escapes corona. highly unstable formation near ele...
We present a measurement of the abundance of Fe relative to H in the solar corona using a technique that differs from previous spectroscopic and solar wind measurements. Our method combines EUV line data from the Coronal Diagnostic Spectrometer (CDS) on the Solar and Heliospheric Observatory with thermal bremsstrahlung radio data from the VLA. The coronal Fe abundance is derived by equating the...
METIS is the Multi Element Telescope for Imaging and Spectroscopy, a Coronagraph aboard the European Space Agency’s Solar Orbiter Mission aimed at the observation of the solar corona via both VIS and UV/EUV narrow-band imaging and spectroscopy. METIS, with its multi-wavelength capabilities, will study in detail the physical processes responsible for the corona heating and the origin and propert...
The ”inverse–dynamo” mechanism — the amplification/generation of fast plasma flows by short scale (turbulent) magnetic fields via magneto–fluid coupling is recognized and explored. It is shown that large–scale magnetic fields and flows are generated simultaneously and proportionately from short scale fields and flows. The stronger the short–scale driver, the stronger are the large–scale product...
M dwarf's atmosphere is expected to be highly magnetized. The magnetic energy can responsible for heating the stellar chromosphere and corona, driving wind. nonlinear propagation of Alfv\'en wave promising mechanism both Based on this scenario, we carried out one-dimensional compressive magnetohydrodynamic (MHD) simulation reproduce atmospheres winds TRAPPIST-1, Proxima Centauri, YZ CMi, AD Leo...
The idea that the corona is at least in part supplied by chromospheric evaporation in loop “micro-events” is quantified in terms of the power requirements of evaporation mechanisms, using recent analyses of data on such events in high temperature EUV lines from the SoHO EIT instrument. Estimates are derived for the pre-event and event values of loop density and temperature and it is shown, usin...
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