Results 61 to 70 of about 720 (196)

The Shape of the Heliosphere Derived from the IBEX Ribbon

The Astrophysical Journal Letters
The shape of the heliosphere remains largely uncertain due to the lack of in situ measurements. However, the energetic neutral atom (ENA) ribbon structure discovered by the Interstellar Boundary EXplorer (IBEX) satellite provides a new perspective.
Shuai Zhang, Kaijun Liu, Quanqi Shi, Anmin Tian, Fei Yao   +4 more
doaj   +1 more source

A Numerical Model for the Dynamics of Pickup Ions Outside the Heliopause and IBEX “Ribbon” Observation

The Astrophysical Journal
The leading mechanism for the origin of the Interstellar Boundary Explorer (IBEX) “ribbon” of enhanced energetic neutral atoms (ENAs) from the outer heliosphere is the so-called secondary ENA process.
Yifan Huang, Fan Guo, Eric J. Zirnstein, Sung Jun Noh, Hui Li, Daniel B. Reisenfeld, Jacob Heerikhuisen   +6 more
doaj   +1 more source

Voyager 2 Observations Near the Heliopause

Journal of Physics: Conference Series, 2020
Abstract This paper discusses plasma characteristics in the heliosheath region before the heliopause (HP), at the HP, and in the very local interstellar medium (VLISM). The Voyager 2 (V2) HP was a sharp boundary where the radial plasma currents went to background levels.
Richardson, John D., Belcher, John W., Burlaga, Leonard F., Cummings, Alan C., Decker, Robert B., Opher, Merav, Stone, Edward C.   +6 more
openaire   +2 more sources

Cosmic ray transport near the heliopause [PDF]

Journal of Physics: Conference Series, 2015
In this paper we summarize our modelling efforts for cosmic rays near the heliopause, and discuss whether galactic cosmic ray modulation beyond the heliopause is possible and present an explanation for the anisotropic nature of the observed cosmic ray intensities in the very local interstellar medium.
R D Strauss, H Fichtner, M S Potgieter, J A le Roux, X Luo   +4 more
openaire   +1 more source

A test for whether or not Voyager 1 has crossed the heliopause [PDF]

, 2014
The Voyager 1 spacecraft is currently in the vicinity of the heliopause, which separates the heliosphere from the local interstellar medium. There has been a precipitous decrease in particles accelerated in the heliosphere and a substantial increase in
Gloeckler, G., L. A. Fisk, Fisk, L. A., G. Gloeckler   +3 more
core   +1 more source

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

Filtration of Interstellar Neutral Helium by Elastic and Charge Exchange Collisions in Heliospheric Boundaries

The Astrophysical Journal, 2023
Interstellar neutral (ISN) helium atoms penetrating the heliosphere are used to find the flow velocity and temperature of the very local interstellar medium near the heliosphere.
P. Swaczyna, F. Rahmanifard, E. J. Zirnstein, J. Heerikhuisen   +3 more
doaj   +1 more source

A NUMERICAL SIMULATION OF COSMIC-RAY MODULATION NEAR THE HELIOPAUSE [PDF]

The Astrophysical Journal, 2015
Based on a hybrid galactic cosmic-ray transport model, which incorporated MHD global heliospheric data into Parker's cosmic-ray transport equation, we studied the behavior of the transport of galactic cosmic rays and the corresponding gradients in their flux near the heliopause (HP).
Xi Luo, Ming Zhang, Marius Potgieter, Xueshang Feng, N. V. Pogorelov   +4 more
openaire   +3 more sources

2D Kelvin–Helmholtz Instability with Anisotropic Pressure

The Astrophysical Journal
The Kelvin–Helmholtz (KH) instability occurs in multiple heliospheric (solar-wind stream interfaces, planetary magnetospheres, cometary tails, heliopause flanks) and interstellar (protoplanetary disks, relativistic jets, neutron star accretion disks ...
Shishir Biswas, Masaru Nakanotani, Dinshaw S. Balsara, Vladimir Florinski, Merav Opher   +4 more
doaj   +1 more source

Empirical Estimate of the Shape of the Upstream Heliopause from IBEX-Lo Helium Measurements: Preliminary Results

, 2017
We present a simplified model of the outer heliosheath to help interpret the observations of interstellar neutral helium by the IBEX-Lo instruments. We assume that the measured particles are composed of the superposition of a primary beam population ...
Park, Jeewoo, Kucharek, Harald, Isenberg, Philip A.   +2 more
core   +1 more source