Results 81 to 90 of about 1,018 (176)

Energy Cascade and Damping in Fast-mode Compressible Turbulence

The Astrophysical Journal Letters
Compressible turbulence governs energy transfer across scales in space and astrophysical systems. Capturing both the turbulence cascade and damping is therefore crucial for models of energy conversion, plasma heating, and particle transport in diverse ...
Chuanpeng Hou, Huirong Yan, Siqi Zhao, Parth Pavaskar   +3 more
doaj   +1 more source

Evidence of a Thick Heliopause Boundary Layer Resulting from Active Magnetic Reconnection with the Interstellar Medium

The Astrophysical Journal
Voyager 1 and 2 data from the vicinity of the heliopause and very local interstellar medium are reexamined to better understand the confounding lack of rotation in the magnetic field ( B -field) across the heliopause observed by both Voyagers, despite ...
Drew L. Turner, Adam Michael, Elena Provornikova, Marc Kornbleuth, Merav Opher, Stefan Eriksson, Benoit Lavraud, Parisa Mostafavi, Matthew E. Hill, Pontus Brandt, Ian J. Cohen, Joseph Westlake, John D. Richardson, Nathan A. Schwadron, David J. McComas   +14 more
doaj   +1 more source

The Global Structure of the Heliosphere

The Astrophysical Journal
As the Sun moves through the local interstellar medium (LISM), it emits charged particles, creating the heliosphere occupied by the plasma of solar origin.
Nikolai V. Pogorelov, Federico Fraternale, Gary P. Zank, Ming Zhang   +3 more
doaj   +1 more source

Mapping Our Path through the Local Interstellar Medium: High-resolution Ultraviolet Absorption Spectroscopy of Sight Lines along the Sun’s Historical Trajectory

The Astrophysical Journal
Using high-resolution UV data obtained from the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope, we focus on eight sight lines along the Sun’s historical trajectory to reconstruct the morphology of our most recent interstellar ...
Hunter Vannier, Seth Redfield, Brian E. Wood, Hans-Reinhard Müller, Jeffrey L. Linsky, Priscilla C. Frisch   +5 more
doaj   +1 more source

An Anisotropic Plasma Model of the Heliospheric Interface

The Astrophysical Journal
We present a pioneering model of the interaction between the solar wind and the surrounding interstellar medium that includes the possibility of different pressures in directions parallel and perpendicular to the magnetic field.
Vladimir Florinski, Dinshaw S. Balsara, Deepak Bhoriya, Gary P. Zank, Shishir Biswas, Swati Sharma, Sethupathy Subramanian   +6 more
doaj   +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
doaj   +1 more source

Diagnostics of Magnetohydrodynamic Modes in the Interstellar Medium through Synchrotron Polarization Statistics

The Astrophysical Journal
One of the biggest challenges in understanding magnetohydrodynamic (MHD) turbulence is identifying the plasma mode components from observational data.
Parth Pavaskar, Ka Ho Yuen, Huirong Yan, Sunil Malik   +3 more
doaj   +1 more source

Implications for Galactic Electron Density Structure from Pulsar Sightlines Intersecting H ii Regions

The Astrophysical Journal
Recent radio surveys have revealed pulsars with dispersion and scattering delays induced by ionized gas that are larger than the rest of the observed pulsar population, in some cases with electron column densities (or dispersion measures, DMs) larger ...
Stella Koch Ocker, Loren D. Anderson, T. Joseph W. Lazio, James M. Cordes, Vikram Ravi   +4 more
doaj   +1 more source

Star formation across cosmic time

Fundamental Plasma Physics
The interstellar medium of galaxies is composed of multiple phases, including molecular, atomic, and ionized gas, as well as dust. Stars are formed within this medium from cold molecular gas clouds, which collapse due to their gravitational attraction ...
Jonathan Freundlich
doaj   +1 more source

The Theory of Resonant Cosmic Ray–driven Instabilities—Growth and Saturation of Single Modes

The Astrophysical Journal
Cosmic-ray (CR) feedback is critical for galaxy formation as CRs drive galactic winds, regularize star formation in galaxies, and escape from active galactic nuclei to heat the cooling cores of galaxy clusters.
Rouven Lemmerz, Mohamad Shalaby, Christoph Pfrommer, Timon Thomas   +3 more
doaj   +1 more source