NDLI: Particle Acceleration in the Heliosphere: Implications for Astrophysics

Content Provider	Springer Nature Link
Author	Fisk, L. A. Gloeckler, G.
Copyright Year	2012
Abstract	There has been a remarkable discovery concerning particles that are accelerated in the solar wind. At low energies, in the region where the particles are being accelerated, the spectrum of the accelerated particles is always the same: when expressed as a distribution function, the spectrum is a power law in particle speed with a spectral index of −5, and a rollover at higher particle speeds that can often be described as exponential. This common spectral shape cannot be accounted for by any conventional acceleration mechanism, such as diffusive shock acceleration or traditional stochastic acceleration. It has thus been necessary to invent a new acceleration mechanism to account for these observations, a pump mechanism in which particles are pumped up in energy through a series of adiabatic compressions and expansions. The conditions under which the pump acceleration is the dominant acceleration mechanism are quite general and are likely to occur in other astrophysical plasmas. In this paper, the most compelling observations of the −5 spectra are reviewed; the governing equation of the pump acceleration mechanism is derived in detail; the pump acceleration mechanism is applied to acceleration at shocks; and, as an illustration of the potential applicability of the pump acceleration mechanism to other astrophysical plasmas, the pump mechanism is applied to the acceleration of galactic cosmic rays in the interstellar medium.
Starting Page	433
Ending Page	458
Page Count	26
File Format	PDF
ISSN	00386308
Journal	Space Science Reviews
Volume Number	173
Issue Number	1-4
e-ISSN	15729672
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-06-03
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Particle acceleration Heliosphere Interstellar medium Extraterrestrial Physics, Space Sciences Planetology Astrophysics and Astroparticles Aerospace Technology and Astronautics
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

The Heliosphere: What Did We Learn in Recent Years and the Current Challenges

Stochastic Acceleration of Energetic Particles in the Heliosphere

Shock Acceleration of Ions in the Heliosphere

Stochastic Acceleration by Turbulence

Interstellar Dust Inside and Outside the Heliosphere

The Acceleration Mechanism of Anomalous Cosmic Rays

Perspectives on Interstellar Dust Inside and Outside of the Heliosphere

The Galactic Environment of the Sun: Interstellar Material Inside and Outside of the Heliosphere

Diagnosing the Neutral Interstellar Gas Flow at 1 AU with IBEX-Lo

Particle Acceleration in the Heliosphere: Implications for Astrophysics

Similar Documents

The Heliosphere: What Did We Learn in Recent Years and the Current Challenges

Stochastic Acceleration of Energetic Particles in the Heliosphere

Shock Acceleration of Ions in the Heliosphere

Stochastic Acceleration by Turbulence

Interstellar Dust Inside and Outside the Heliosphere

The Acceleration Mechanism of Anomalous Cosmic Rays

Perspectives on Interstellar Dust Inside and Outside of the Heliosphere

The Galactic Environment of the Sun: Interstellar Material Inside and Outside of the Heliosphere

Diagnosing the Neutral Interstellar Gas Flow at 1 AU with IBEX-Lo

Particle Acceleration in the Heliosphere: Implications for Astrophysics