Results 71 to 80 of about 932 (205)

SUPERPOSITION OF POLYTROPES IN THE INNER HELIOSHEATH

The Astrophysical Journal Supplement Series, 2016
This paper presents a possible generalization of the equation of state and Bernoulli's integral when a superposition of polytropic processes applies in space and astrophysical plasmas. The theory of polytropic thermodynamic processes for a fixed polytropic index is extended for a superposition of polytropic indices. In general, the superposition may be
openaire   +1 more source

Constraining the Properties of the Multicomponent Local Interstellar Medium: MHD-kinetic Modeling Validated by Voyager and New Horizons Data

The Astrophysical Journal Letters
We introduce the first solar-cycle simulations from our 3D, global MHD-plasma/kinetic-neutrals model, where both hydrogen and helium atoms are treated kinetically, while electrons and helium ions are described as individual fluids.
Federico Fraternale, Nikolai V. Pogorelov, Ratan K. Bera   +2 more
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The IBEX Ribbon and the Thickness of the Inner Heliosheath

The Astrophysical Journal, 2018
Abstract The dominant feature in global images of 1 keV heliospheric energetic neutral atom (ENA) emissions is the Interstellar Boundary Explorer Ribbon. Several mechanisms have been proposed for creating the Ribbon, including the so-called secondary ENA mechanism.
S. A. Fuselier, M. A. Dayeh, E. Möbius
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Ionization rates in the heliosheath and in astrosheaths

, 2013
18 pages, 9 ...
Scherer, K., Fichtner, H., Fahr, H. -J., Bzowski, M., Ferreira, S. E. S.   +4 more
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PRESSURE OF THE PROTON PLASMA IN THE INNER HELIOSHEATH

The Astrophysical Journal, 2012
We develop a physical model to study the pressure of the source proton plasma in the inner heliosheath based on the IBEX Energetic Neutral Atom (ENA) spectra. A multiple linear regression technique is used to parameterize the proton distribution function, by connecting the observed ENA flux spectrum from IBEX-Hi with the power-law of the model proton ...
G. Livadiotis, D. J. McComas, N. A. Schwadron, H. O. Funsten, S. A. Fuselier   +4 more
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Interstellar Neutral Hydrogen in the Heliosphere: New Horizons Observations in the Context of Models

The Astrophysical Journal Letters
Interstellar neutral (ISN) hydrogen is the most abundant species in the outer heliosheath and the very local interstellar medium (VLISM). Charge-exchange collisions in the outer heliosheath result in filtration, reducing the ISN hydrogen density inside ...
P. Swaczyna, M. Bzowski, K. Dialynas, L. Dyke, F. Fraternale, A. Galli, J. Heerikhuisen, M. Z. Kornbleuth, D. Koutroumpa, I. Kowalska-Leszczyńska, M. A. Kubiak, A. T. Michael, H.-R. Müller, M. Opher, F. Rahmanifard   +14 more
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Future Exploration of the Outer Heliosphere and Very Local Interstellar Medium by Interstellar Probe. [PDF]

Space Sci Rev, 2023
Brandt PC, Provornikova E, Bale SD, Cocoros A, DeMajistre R, Dialynas K, Elliott HA, Eriksson S, Fields B, Galli A, Hill ME, Horanyi M, Horbury T, Hunziker S, Kollmann P, Kinnison J, Fountain G, Krimigis SM, Kurth WS, Linsky J, Lisse CM, Mandt KE, Magnes W, McNutt RL, Miller J, Moebius E, Mostafavi P, Opher M, Paxton L, Plaschke F, Poppe AR, Roelof EC, Runyon K, Redfield S, Schwadron N, Sterken V, Swaczyna P, Szalay J, Turner D, Vannier H, Wimmer-Schweingruber R, Wurz P, Zirnstein EJ.   +42 more
europepmc   +1 more source

Lyα Absorption in a “Croissant-like” Heliosphere

The Astrophysical Journal
Ly α absorption profiles have been used to detect astrospheres and heliospheric absorption from the hydrogen wall and heliotail. Using magnetohydrodynamic models of the heliosphere, we can compare simulated to observed Ly α profiles to probe the neutral ...
Erick Powell, Merav Opher, Marc Z. Kornbleuth, Igor Baliukin, Adam T. Michael, Brian E. Wood, Vladislav Izmodenov, Gabor Toth, Valeriy Tenishev   +8 more
doaj   +1 more source

A Forecast for a South Heliopause Crossing by Voyager 2 in Late 2014 Using Intensity-time Features of Energetic Particles Observed by V1 and V2 in the North and South Heliosheaths [PDF]

, 2014
W. R. Webber, D. S. Intriligator
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An Investigation of the Evolution of Heliosheath Energetics Using a Pressure Enhancement Event Observed by IBEX

The Astrophysical Journal
During solar cycle 24, an increase in the solar wind (SW) dynamic pressure in late 2014 caused a sharp increase in the heliospheric energetic neutral atom (ENA) flux that was seen by the Interstellar Boundary Explorer (IBEX) at 1 au in late 2016.
Nehpreet K. Walia, Daniel B. Reisenfeld, Lauren J. Beesley, Paul H. Janzen, Thomas K. Kim, Asher S. Merrill, Sung Jun Noh, Dave Osthus, Eric J. Zirnstein   +8 more
doaj   +1 more source