Proton firehose instability: An interplay of thermal core and non-thermal halo protons

Proton firehose instability: An interplay of thermal core and non-thermal halo protons

Higher levels of solar wind temperatures are reported to be constrained. Microinstabilities play a key role under dilute space plasma conditions. The present study highlights the role of proton firehose instability in defining parallel temperatures of protons. Considering reality, we chose a bi-Maxw...

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Main Authors: M. Sarfraz, S. Noureen, G. Abbas, I. Zeba, M. Jamil, S. S. A. Gillani
Format: Article
Language:English
Published: AIP Publishing LLC 2019-12-01
Series:AIP Advances
Online Access:http://dx.doi.org/10.1063/1.5121278
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spelling doaj-fff70003252344f4bdcbb5e96319601c2020-11-25T02:03:47ZengAIP Publishing LLCAIP Advances2158-32262019-12-01912125301125301-510.1063/1.5121278Proton firehose instability: An interplay of thermal core and non-thermal halo protonsM. Sarfraz0S. Noureen1G. Abbas2I. Zeba3M. Jamil4S. S. A. Gillani5Department of Physics, GC University, Katchery Road, Lahore 54000, PakistanDepartment of Physics, GC University, Katchery Road, Lahore 54000, PakistanDepartment of Physics, GC University, Katchery Road, Lahore 54000, PakistanDepartment of Physics, Lahore College for Women University, Lahore 54000, PakistanCOMSATS University Islamabad, Lahore-Campus, Lahore 54000, PakistanDepartment of Physics, GC University, Katchery Road, Lahore 54000, PakistanHigher levels of solar wind temperatures are reported to be constrained. Microinstabilities play a key role under dilute space plasma conditions. The present study highlights the role of proton firehose instability in defining parallel temperatures of protons. Considering reality, we chose a bi-Maxwellian model for core protons, while halo protons are best modeled with kappa distribution. Taking different sets of input parameters like temperature anisotropy, plasma beta, and kappa index into account, the growth rate levels and associated domains for an unstable firehose mode are investigated.http://dx.doi.org/10.1063/1.5121278
collection DOAJ
language English
format Article
sources DOAJ
author M. Sarfraz
S. Noureen
G. Abbas
I. Zeba
M. Jamil
S. S. A. Gillani
spellingShingle M. Sarfraz
S. Noureen
G. Abbas
I. Zeba
M. Jamil
S. S. A. Gillani
Proton firehose instability: An interplay of thermal core and non-thermal halo protons
AIP Advances
author_facet M. Sarfraz
S. Noureen
G. Abbas
I. Zeba
M. Jamil
S. S. A. Gillani
author_sort M. Sarfraz
title Proton firehose instability: An interplay of thermal core and non-thermal halo protons
title_short Proton firehose instability: An interplay of thermal core and non-thermal halo protons
title_full Proton firehose instability: An interplay of thermal core and non-thermal halo protons
title_fullStr Proton firehose instability: An interplay of thermal core and non-thermal halo protons
title_full_unstemmed Proton firehose instability: An interplay of thermal core and non-thermal halo protons
title_sort proton firehose instability: an interplay of thermal core and non-thermal halo protons
publisher AIP Publishing LLC
series AIP Advances
issn 2158-3226
publishDate 2019-12-01
description Higher levels of solar wind temperatures are reported to be constrained. Microinstabilities play a key role under dilute space plasma conditions. The present study highlights the role of proton firehose instability in defining parallel temperatures of protons. Considering reality, we chose a bi-Maxwellian model for core protons, while halo protons are best modeled with kappa distribution. Taking different sets of input parameters like temperature anisotropy, plasma beta, and kappa index into account, the growth rate levels and associated domains for an unstable firehose mode are investigated.
url http://dx.doi.org/10.1063/1.5121278
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AT snoureen protonfirehoseinstabilityaninterplayofthermalcoreandnonthermalhaloprotons
AT gabbas protonfirehoseinstabilityaninterplayofthermalcoreandnonthermalhaloprotons
AT izeba protonfirehoseinstabilityaninterplayofthermalcoreandnonthermalhaloprotons
AT mjamil protonfirehoseinstabilityaninterplayofthermalcoreandnonthermalhaloprotons
AT ssagillani protonfirehoseinstabilityaninterplayofthermalcoreandnonthermalhaloprotons
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