Brightness Temperature of Radio Zebras and Wave Energy Densities in Their Sources

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00482456" target="_blank" >RIV/67985815:_____/17:00482456 - isvavai.cz</a>
Alternative codes found
RIV/00216224:14310/17:00098163
Result on the web
<a href="http://dx.doi.org/10.1007/s11207-017-1174-4" target="_blank" >http://dx.doi.org/10.1007/s11207-017-1174-4</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11207-017-1174-4" target="_blank" >10.1007/s11207-017-1174-4</a>

Result language
angličtina
Original language name
Brightness Temperature of Radio Zebras and Wave Energy Densities in Their Sources
Original language description
We estimated the brightness temperature of radio zebras (zebra pattern - ZP), considering that ZPs are generated in loops having an exponential density profile in their cross section. We took into account that when in a plasma there is a source emitting in all directions, then in the escape process from the plasma the emission has a directional character nearly perpendicular to the constant-density profile. Owing to the high directivity of the plasma emission (for emission at frequencies close to the plasma frequency), the region from which the emission escapes can be very small. We estimated the brightness temperature of three observed ZPs for two values of the density scale height (1 and 0.21 Mm) and two values of the loop width (1 and 2 arcsec). In all cases, high brightness temperatures were obtained. For the higher value of the density scale height, the brightness temperature was estimated to be 1.1 x 10(15) -1.3 x 10(17) K, and for the lower value, it was 4.7 x 10(13) - 5.6 x 10(15) K. These temperatures show that the observational probability of a burst with a ZP, which is generated in the transition region with a steep gradient of the plasma density, is significantly higher than for a burst generated in a region with smoother changes of the plasma density.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)