Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Andreas Johlander"'
Publikováno v:
Geophysical Research Letters, Vol 50, Iss 5, Pp n/a-n/a (2023)
Abstract Electron heating at collisionless shocks in space is a combination of adiabatic heating due to large‐scale electric and magnetic fields and non‐adiabatic scattering by high‐frequency fluctuations. The scales at which heating happens hi
Externí odkaz:
https://doaj.org/article/f3c4cc42013c47a6b5435c61b057affe
Autor:
Savvas Rapitis, Tomas Karlsson, Andris Vaivads, Craig Pollock, Ferdinand Plaschke, Andreas Johlander, Henriette Trollvik, Per-Arne Lindqvist
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-10 (2022)
Several mechanisms exist for formation of jets observed in Earth’s magnetosheath. Here, the authors show evidence of high-speed downstream flows generated at the Earth’s bow shock as a direct consequence of shock reformation, which is different t
Externí odkaz:
https://doaj.org/article/98b5044d3f0d4f23badcb12c309d43b5
Autor:
Lucile Turc, Hongyang Zhou, Vertti Tarvus, Matti Ala-Lahti, Markus Battarbee, Yann Pfau-Kempf, Andreas Johlander, Urs Ganse, Maxime Dubart, Harriet George, Maxime Grandin, Konstantinos Horaites, Fasil Tesema, Jonas Suni, Markku Alho, Konstantinos Papadakis, Minna Palmroth
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 9 (2022)
Ultra-low frequency (ULF) waves in the Pc3 range, with periods between 10–45 s, are routinely observed in Earth’s dayside magnetosphere. They are thought to originate in the foreshock, which extends upstream of the quasi-parallel bow shock and is
Externí odkaz:
https://doaj.org/article/4415610f3b934334a522dd22587b72cf
Autor:
Hongyang Zhou, Lucile Turc, Yann Pfau-Kempf, Markus Battarbee, Vertti Tarvus, Maxime Dubart, Harriet George, Giulia Cozzani, Maxime Grandin, Urs Ganse, Markku Alho, Andreas Johlander, Jonas Suni, Maarja Bussov, Konstantinos Papadakis, Konstantinos Horaites, Ivan Zaitsev, Fasil Tesema, Evgeny Gordeev, Minna Palmroth
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 9 (2022)
Ultra-low frequency (ULF) waves are routinely observed in Earth’s dayside magnetosphere. Here we investigate the influence of externally-driven density variations in the near-Earth space in the ULF regime using global 2D simulations performed with
Externí odkaz:
https://doaj.org/article/cfc565e899954af6a9d1ed6435e8bae8
Autor:
Savvas Raptis, Tomas Karlsson, Andris Vaivads, Craig Pollock, Ferdinand Plaschke, Andreas Johlander, Henriette Trollvik, Per-Arne Lindqvist
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-1 (2022)
Externí odkaz:
https://doaj.org/article/4d733d1b34df46cda1fdd978496f5c49
Autor:
Lucile Turc, Owen W. Roberts, Daniel Verscharen, Andrew P. Dimmock, Primoz Kajdic, Minna Palmroth, Yann Pfau-Kempf, Andreas Johlander, Maxime Dubart, Emilia K.J. Kilpua, Kazue Takahashi, Naoko Takahashi, Markus Battarbee, Urs Ganse
The foreshock, extending upstream of the quasi-parallel shock and populated with shock-reflected particles, is home to intense wave activity in the ultra-low frequency range. The most commonly observed of these waves are the '30-second' waves, fast m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4aa6c5872c66479c147b81f0d9c2741a
https://doi.org/10.5194/egusphere-egu23-6637
https://doi.org/10.5194/egusphere-egu23-6637
MMS can resolve the fine structure of the shock ramp, which often shows holes in reduced ion-phase space distributions (integrated along the tangential plane of the shock). This is possible due to the high temporal resolutions of FPI/DIS. Such holes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3001ebd4c4d12c209ffee62fdeb254ea
https://doi.org/10.5194/egusphere-egu23-15872
https://doi.org/10.5194/egusphere-egu23-15872
Autor:
Andreas Johlander, Urs Ganse, Yann Pfau-Kempf, Thiago Brito, Maxime Grandin, Maxime Dubart, Markus Battarbee, Konstantinos Papadakis, Markku Alho, Minna Palmroth, Lucile Turc
Publikováno v:
Annales Geophysicae, Vol 39, Pp 85-103 (2021)
Modern investigations of dynamical space plasma systems such as magnetically complicated topologies within the Earth's magnetosphere make great use of supercomputer models as well as spacecraft observations. Space plasma simulations can be used to in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8878b91732e5a86cc2c12ba94d2adde6
https://angeo.copernicus.org/articles/39/85/2021/angeo-39-85-2021.pdf
https://angeo.copernicus.org/articles/39/85/2021/angeo-39-85-2021.pdf
Identifying collisionless shock crossings in data sent from spacecraft has so far been done manually. It is a tedious job that shock physicists have to go through if they want to conduct case studies or perform statistical studies. We use a machine l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac505b2e01aad54b9f96d562c8393196
https://doi.org/10.5194/egusphere-egu22-9885
https://doi.org/10.5194/egusphere-egu22-9885
Autor:
Lucile Turc, Owen Roberts, Daniel Verscharen, Andrew Dimmock, Primoz Kajdic, Minna Palmroth, Yann Pfau-Kempf, Andreas Johlander, Maxime Dubart, Emilia Kilpua, Jan Soucek, Kazue Takahashi, Naoko Takahashi, Markus Battarbee, Urs Ganse
The foreshock, extending upstream of the quasi-parallel shock and populated with shock-reflected particles, is home to intense wave activity in the ultra-low frequency range. The most commonly observed of these waves are the "30-second" waves, fast m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc86c4b0521e09ca65de815350c55d1a
https://doi.org/10.5194/egusphere-egu22-7655
https://doi.org/10.5194/egusphere-egu22-7655