Zobrazeno 1 - 10
of 164
pro vyhledávání: '"Bernard J. Vasquez"'
Autor:
Charles W. Smith, Bernard J. Vasquez
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
The solar wind forms the largest wind tunnel for plasma and magnetofluid turbulence that is accessible to Earth. It evolves from what is thought to be a turbulent source that continues to drive nonlinear turbulent dynamics as it expands outward via l
Externí odkaz:
https://doaj.org/article/1c809d0d5249433c9c26fae6e312881a
Autor:
S. A. Markovskii, Bernard J. Vasquez
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 1 (2024)
Observational data at heliocentric distances of tens of solar radii suggest that fast magnetosonic modes make up a considerable fraction of the solar wind fluctuations. Furthermore, this fraction appears to increase closer to the Sun. We carry out th
Externí odkaz:
https://doaj.org/article/9633cf73034a4a3fb41f2e7cefd75c51
Autor:
S. A. Markovskii, Bernard J. Vasquez
Publikováno v:
The Astrophysical Journal, Vol 955, Iss 2, p 95 (2023)
We investigate a secondary proton beam instability coexisting with the ambient solar wind turbulence at 50 R _☉ . Three-dimensional hybrid numerical simulations (particle ions and a quasi-neutralizing electron fluid) are carried out with the plasma
Externí odkaz:
https://doaj.org/article/e3844d3ff64c43caa277851e189c1550
Autor:
S. A. Markovskii, Bernard J. Vasquez
Publikováno v:
The Astrophysical Journal, Vol 952, Iss 1, p 16 (2023)
Some of the most common processes in the solar wind, such as turbulence and wave generation by instabilities, are associated with spectral magnetic helicity. Therefore, the helicity is a convenient tool to investigate these processes. We use three-di
Externí odkaz:
https://doaj.org/article/c863cebd33694f10b004f41eb5eef350
Publikováno v:
The Astrophysical Journal, Vol 944, Iss 1, p 84 (2023)
We revisit the question of how the unstable scattering of interstellar pickup ions (PUIs) may drive turbulence in the outer solar wind and why the energy released into fluctuations by this scattering appears to be significantly less than the standard
Externí odkaz:
https://doaj.org/article/8149e28a15c448a9aadb47dc8e79b668
Autor:
Lily A. Ercoline, Charles W. Smith, Matthew R. Argall, Colin J. Joyce, Philip A. Isenberg, Bernard J. Vasquez, Nathan A. Schwadron, Justyna M. Sokół, Leonard F. Burlaga
Publikováno v:
The Astrophysical Journal, Vol 945, Iss 2, p 168 (2023)
Interstellar neutral atoms enter the heliosphere at a relatively slow speed corresponding to the motion of the Sun through the local interstellar medium, which is approximately 25 km s ^−1 . Neutral hydrogen atoms enter from the approximate locatio
Externí odkaz:
https://doaj.org/article/d3f6009592364690a75cda83bbb8b95e
Autor:
Charles W. Smith, Bernard J. Vasquez
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 7 (2021)
Fifty years of solar wind observations have provided extensive data that drives an evolving view of the fundamental nature and dynamics of the magnetic, velocity, and density fluctuations that are ubiquitous throughout the heliosphere. Despite the on
Externí odkaz:
https://doaj.org/article/2c0d3ff59dcc45fcb24784614fff771e
Autor:
Sophia J. Hollick, Charles W. Smith, Zackary B. Pine, Matthew R. Argall, Colin J. Joyce, Philip A. Isenberg, Bernard J. Vasquez, Nathan A. Schwadron, Justyna M. Sokół, Maciej Bzowski, Marzena A. Kubiak, F. Bagenal, John D. Richardson
Publikováno v:
Journal of Geophysical Research: Space Physics. 127
Autor:
S. A. Markovskii, Bernard J. Vasquez
Publikováno v:
The Astrophysical Journal. 930:120
The proton–alpha drift instability is a possible mechanism of the alpha-particle deceleration and the resulting proton heating in the solar wind. We present hybrid numerical simulations of this instability with particle-in-cell ions and a quasi-neu
Autor:
Rumi Nakamura, Robert E. Ergun, C. J. Pollock, Christopher T. Russell, Charlie J. Farrugia, Per-Arne Lindqvist, Noé Lugaz, Kristoff Paulson, Barry Mauk, Roy B. Torbert, S. A. Fuselier, D. J. Gershman, J. R. Shuster, Robert J. Strangeway, B. Lavraud, Ian J. Cohen, L. Alm, A. J. Rogers, Bernard J. Vasquez, Yuri V. Khotyaintsev, Göran Marklund, D. Payne, Barbara L. Giles, Matthew R. Argall, Hiroshi Matsui, James L. Burch, Fausto T. Gratton, S. M. Petrinec, Terry G. Forbes
Publikováno v:
Journal of Geophysical Research: Space Physics. 123:8983-9004
In this paper we report on a sequence of large-amplitude Alfvenic fluctuations terminating in a field and flow discontinuity and their effects on electromagnetic fields and plasmas in the near-magn ...