Deriving the coronal hole electron temperature: electron density dependent ionization / recombination considerations
نویسندگان
چکیده
منابع مشابه
Letter to the Editor Measurement of the electron temperature gradient in a solar coronal hole
It has long been established that the high speed solar wind streams observed at 1 A.U. originate from the coronal hole regions of the Sun. Theoretical modelling of the acceleration mechanism depends critically on the value of the maximum of temperature existing close to the Sun. Measurements of the temperature in coronal holes prior to SOHO are unreliable. The very low luminosity leads to extre...
متن کاملCarrier-density-dependent recombination dynamics of excitons and electron-hole plasma in m-plane InGaN/GaN quantum wells
We study the carrier-density-dependent recombination dynamics in m-plane InGaN/GaN multiple quantum wells in the presence of n-type background doping by time-resolved photoluminescence. Based on Fermi’s golden rule and Saha’s equation, we decompose the radiative recombination channel into an excitonic and an electron-hole pair contribution, and extract the injected carrier-density-dependent bim...
متن کاملCooperative recombination of a quantized high-density electron-hole plasma in semiconductor quantum wells.
We investigate photoluminescence from a high-density electron-hole plasma in semiconductor quantum wells created via intense femtosecond excitation in a strong perpendicular magnetic field, a fully quantized and tunable system. At a critical magnetic field strength and excitation fluence, we observe a clear transition in the band-edge photoluminescence from omnidirectional output to a randomly ...
متن کاملElectron-Hole Recombination Rates for Auger Scattering in Graphene
We calculate electron-hole recombination rates for Auger scattering in Graphene. The conduction and valence band dispersion relation in Graphene together with energy and momentum conservation requirements restrict the phase space for Auger processes so that electron-hole recombination times can be much longer than 1 ps for electron-hole densities smaller than 1012 cm−2.
متن کاملElectron-electron and electron-hole pairing in graphene structures.
The superconducting pairing of electrons in doped graphene owing to in-plane and out-of-plane phonons is considered. It is shown that the structure of the order parameter in the valley space substantially affects conditions of the pairing. Electron-hole pairing in a graphene bilayer in the strong coupling regime is also considered. Taking into account retardation of the screened Coulomb pairing...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Research in Astronomy and Astrophysics
سال: 2010
ISSN: 1674-4527
DOI: 10.1088/1674-4527/10/1/008