Till sidans topp

Sidansvarig: Webbredaktion
Sidan uppdaterades: 2012-09-11 15:12

Tipsa en vän
Utskriftsversion

The solar wind proton eje… - Göteborgs universitet Till startsida
Webbkarta
Till innehåll Läs mer om hur kakor används på gu.se

The solar wind proton ejection mechanism: Experiments with ultradense hydrogen agree with observed velocity distributions

Artikel i vetenskaplig tidskrift
Författare Leif Holmlid
Publicerad i Journal of Geophysical Research-Space Physics
Volym 122
Nummer/häfte 8
Sidor 7956-7962
ISSN 2169-9380
Publiceringsår 2017
Publicerad vid Institutionen för kemi och molekylärbiologi
Sidor 7956-7962
Språk en
Länkar doi.org/10.1002/2017ja024498
Ämnesord solar wind, ultradense hydrogen, velocity, laser-induced processes, dense deuterium d(0), rydberg matter, coulomb, explosions, clusters, energy, spectra, Astronomy & Astrophysics
Ämneskategorier Astronomi, astrofysik och kosmologi

Sammanfattning

Ultradense hydrogen H(0) is a very dense hydrogen cluster phase with H-H distances in the picometer range. It has been studied experimentally in several publications from our group. A theoretical model exists which agrees well with laser-pulse-induced time-of-flight spectra and with rotational spectroscopy emission spectra. Coulomb explosions in H(0) in spin state s = 1 generate protons with kinetic energies larger than the retaining gravitational energy at the photosphere of the Sun. The required proton kinetic energy above 2 keV has been directly observed in published experiments. Such protons may be ejected from the Sun and are proposed to form the solar wind. The velocity distributions of the protons are calculated for three different ejecting modes from spin state s = 1. They agree well with both the fast and the slow solar winds. The best agreement is found for H(0) cluster sizes of 3 and 20-50 atoms; such clusters have been studied experimentally previously. The properties of ultradense hydrogen H(0) give also a few novel possibilities to explain the high corona temperature of the Sun. Plain Language Summary The solar wind contains protons from the Sun with high velocity. The mechanism for their ejection from the strong gravitation at the Sun's surface has been debated for a long time. Protons with high enough energy can be ejected from a condensed form of hydrogen called ultradense hydrogen, which is stable even at the temperature of the Sun. Experiments show that such a mechanism exists. Calculations now give good agreement with the velocities of both the slow and the fast solar winds.

Sidansvarig: Webbredaktion|Sidan uppdaterades: 2012-09-11
Dela:

På Göteborgs universitet använder vi kakor (cookies) för att webbplatsen ska fungera på ett bra sätt för dig. Genom att surfa vidare godkänner du att vi använder kakor.  Vad är kakor?