Results 61 to 70 of about 78,626 (296)

Hybrid viscosity and the magnetoviscous instability in hot, collisionless accretion disks

, 2008
We aim to illustrate the role of hot protons in enhancing the magnetorotational instability (MRI) via the ``hybrid'' viscosity, which is due to the redirection of protons interacting with static magnetic field perturbations, and to establish that it is ...
A. Brandenburg, B. Paczyński, C. M. Filho, E. Quataert, F. Casse, G. F. Chew, J. A. Eilek, J. Candia, J. Giacalone, M. Kafatos, N. I. Shakura, P. Sharma, P. Sharma, P. Subramanian, R. Mahadevan, R. Matsumoto, R. Narayan, R. Narayan, S. A. Balbus, S. A. Balbus, S. A. Balbus, S. L. Shapiro, T. Islam   +22 more
core   +1 more source

The Many Routes to AGN Feedback [PDF]

, 2017
The energy released by Active Galactic Nuclei (AGN) in the form of radiation, winds, or radio plasma jets, is known to impact on the surrounding interstellar medium. The result of these processes, known as AGN (negative) feedback, is suggested to prevent
Morganti, Raffaella
core   +2 more sources

Rapid terrestrial weathering of the CI1 carbonaceous chondrite find Oued Chebeika 002

Meteoritics &Planetary Science, EarlyView.
Abstract Alteration of historic CI1 meteorite falls during their curation demonstrates the susceptibility of smectite‐rich carbonaceous chondrites to terrestrial exposure. The discovery of Oued Chebeika 002 in Morocco in June 2024 presents a unique opportunity to document the earliest stages of weathering of a CI1 find.
Martin R. Lee, Jasper Glazer
wiley   +1 more source

Turbulent magnetic pressure instability in stratified turbulence [PDF]

, 2010
A reduction of total mean turbulent pressure due to the presence of magnetic fields was previously shown to be a measurable effect in direct numerical simulations.
A. Brandenburg, I. Rogachevskii, K. Kemel, N. Kleeorin, Spruit   +4 more
core   +1 more source

Broadband plasma spray anti-reflection coating technology for millimeter-wave astrophysics [PDF]

, 2023
O. Jeong, R. L. Plambeck, Christopher Raum, Aritoki Suzuki, Adrian T. Lee   +4 more
openalex   +1 more source

Sampling the volcanic plumes at Io: Impact speeds and shock conditions

Meteoritics &Planetary Science, EarlyView.
Abstract The desire to sample material from the interior of Io, by flying through its volcanic plumes, requires consideration of the flyby speed and the types of sample collection techniques that can be utilized. Low speed collection (1–2.5 km s−1) would require an orbit around Io itself, which is unlikely due to the accumulated radiation dose that ...
M. J. Burchell, R. C. Ogliore, P. J. Wozniakiewicz   +2 more
wiley   +1 more source

Mass Cycle and Dynamics of a Virtual Quiescent Prominence

The Astrophysical Journal
The mass cycle of solar prominences or filaments is still not completely understood. Researchers agree that these dense structures form by coronal in situ condensations and plasma siphoning from the underlying chromosphere.
D. Donné, R. Keppens
doaj   +1 more source

Extreme Plasma Astrophysics

, 2019
This is a science white paper submitted to the Astro-2020 and Plasma-2020 Decadal Surveys. The paper describes the present status and emerging opportunities in Extreme Plasma Astrophysics -- a study of astrophysically-relevant plasma processes taking place under extreme conditions that necessitate taking into account relativistic, radiation, and QED ...
Uzdensky, D, Begelman, M, Beloborodov, A, Blandford, R, Boldyrev, S, Cerutti, B, Fiuza, F, Giannios, D, Grismayer, T, Kunz, M, Loureiro, N, Lyutikov, M, Medvedev, M, Petropoulou, M, Philippov, A, Quataert, E, Schekochihin, A, Schoeffler, K, Silva, L, Sironi, L, Spitkovsky, A, Werner, G, Zhdankin, V, Zrake, J, Zweibel, E   +24 more
openaire   +3 more sources

The effect of early diagenetic processes on the quantification of fossil micrometeorite abundance and flux in the geological record

Meteoritics &Planetary Science, EarlyView.
Abstract Fossil micrometeorites (MMs) recovered from lithified sedimentary rocks, particularly iron‐rich (I‐type) cosmic spherules (CSs) provide valuable insights into past dust‐forming events. Their abundances, when combined with estimates of local sedimentation rates can be used to reconstruct the flux of extraterrestrial dust.
Isabelle S. Mattia, Matthew J. Genge, Martin D. Suttle   +2 more
wiley   +1 more source

Rotational Flows in Solar Coronal Flux Rope Cavities

The Astrophysical Journal Letters, 2023
We present a 2.5D magnetohydrodynamic simulation of a systematically rotating prominence inside its coronal cavity using the open-source MPI-AMRVAC code.
Valeriia Liakh, Rony Keppens
doaj   +1 more source