Slow solar wind: observations and modeling
Webb24 nov. 2024 · Depending on its speed, solar wind is divided into fast and slow components. The so-called fast solar wind, which reaches speeds of more than 500 kilometers per second, originates from interiors of coronal holes, regions that appear dark in coronal ultraviolet radiation. The source regions of slow solar wind are less certain … Webb1. Weather and Design Weather Observations Wind Speed and Direction Wind speed is measured with an anemometer. The most common type is a the cup-type anemometer, shown on the right side of the picture below. The number of rotations per time interval is used to calculate the wind speed.
Slow solar wind: observations and modeling
Did you know?
Webb1 juli 2016 · The aim of this review is to present insights on the SSW origin and formation gathered from the discussions at the International Space … Webb1 jan. 2001 · Many observations of the solar wind have in the past been made, e.g., in situ by Helios and Ulysses and remotely by SOHO. Correspondingly, many models for the fast …
WebbThe most widely accepted origin explanation posits that the Moon formed 4.51 billion years ago, not long after Earth, out of the debris from a giant impact between the planet and a hypothesized Mars -sized body called Theia. It then receded to a wider orbit because of tidal interaction with the Earth. WebbRecent SOHO/UVCS observations of the O5+ ion line emission at 1032A in coronal streamers indicate that the emission is stronger by an order of magnitude at the edges …
WebbModels for the origin of the slow solar wind must account for two seemingly contradictory observations: the slow wind has the composition of the closed-field corona, implying … Webb2 maj 2016 · Abstract: The steady, supersonic outflow from the Sun we call the solar wind was first posited in the 1950s and initial theories rightly linked the acceleration of the wind to the existence of the million-degree solar corona. Still today, the wind acceleration mechanisms and the coronal heating processes remain unsolved challenges in solar …
Webb29 juni 2016 · The in situ solar wind measurements in the heliosphere have found that some slow speed wind bears some signatures of the fast speed wind (e.g., Zhao et al. 2009; D’Amicis and Bruno 2015 ). Thus, clearly speed is not the only indicator for the …
Webb7 nov. 2012 · Observations of Mg9+ ion EUV emission in coronal streamers at solar minimum were first reported by the UVCS instrument. The Mg X 625A emission is an … chjss75Webb2 nov. 2011 · During solar maximum, the slow wind is observed to originate from higher latitudes, as well as from the vicinity of active regions. The two populations are not distinguished by flow speed only, but also by densities, temperatures, composition, abundances, distribution functions and first ionization potential (FIP) levels. chjpp printer toner and inkWebbOBSERVATIONS AND MODELS OF SLOW SOLAR WIND WITH Mg9+ IONS IN QUIESCENT STREAMERS L. Ofman1,2 4, L. Abbo 3, and S. Giordano 1 Department of Physics, … grassley comments on irsWebb1 juli 1998 · The highest-speed wind came from the polar coronal holes, with the wind originating deeper within the hole being faster than the wind coming from near the hole … grassley chief of staffWebb25 nov. 2024 · More information: L. P. Chitta et al, Direct observations of a complex coronal web driving highly structured slow solar wind, Nature Astronomy (2024). DOI: 10.1038/s41550-022-01834-5 Journal ... grassley comments on trumpWebbSlow Solar Wind: Observations and Modeling. While it is certain that the fast solar wind originates from coronal holes, where and how the slow solar wind (SSW) is formed … chjsd50aWebb8 mars 2024 · Slow Solar Wind: Observations and Modeling. April 13, 2024. New NASA STI. Abstract: While it is certain that the fast solar wind originates from coronal holes, … grassley committee inc