Electron energetics in the expanding solar wind via Helios observations

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F15%3A00451776" target="_blank" >RIV/68378289:_____/15:00451776 - isvavai.cz</a>

Alternative codes found

RIV/67985815:_____/15:00458091

Result on the web

<a href="http://dx.doi.org/10.1002/2015JA021368" target="_blank" >http://dx.doi.org/10.1002/2015JA021368</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/2015JA021368" target="_blank" >10.1002/2015JA021368</a>

Result language

angličtina

Original language name

Electron energetics in the expanding solar wind via Helios observations

Original language description

We present an observational analysis of electron cooling/heating rates in the fast and slow solar wind between 0.3 and 1 AU. We fit electron velocity distribution functions acquired in situ by Helios 1 and 2 spacecraft by a three-component (core-halo-strahl) analytical model. The resulting radial profiles of macroscopic characteristics (density, temperatures, and heat fluxes) are employed to examine properties of theoretical energy balance equations and to estimate external cooling/heating terms. Our analysis indicates that in contrast to solar wind protons the electrons do not require important heating mechanisms to explain the observed temperature gradients. The electron heating rates are actually found to be negative for both the slow and fast solar wind, namely, due to the significant degradation of the electron heat flux with increasing radial distance from the Sun. Cooling mechanisms acting on electrons are found to be significantly stronger in the slow wind than in the fast wind streams.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BN - Astronomy and celestial mechanics, astrophysics

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Geophysical Research: Space Physics

ISSN

2169-9380

e-ISSN

—

Volume of the periodical

120

Issue of the periodical within the volume

10

Country of publishing house

US - UNITED STATES

Number of pages

17

Pages from-to

8177-8193

UT code for WoS article

000366135200001

EID of the result in the Scopus database

2-s2.0-84954370109