Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Nikos Sioulas"'
Autor:
Zesen Huang, Chen Shi, Marco Velli, Nikos Sioulas, Olga Panasenco, Trevor Bowen, Lorenzo Matteini, Mingtao Xia, Xiaofei Shi, Sheng Huang, Jia Huang, Lizet Casillas
Publikováno v:
The Astrophysical Journal Letters, Vol 973, Iss 1, p L26 (2024)
The heliosphere is permeated with highly structured solar wind originating from the Sun. One of the primary science objectives of Parker Solar Probe (PSP) is to determine the structures and dynamics of the plasma and magnetic fields at the sources of
Externí odkaz:
https://doaj.org/article/49c71d7fd5124c7ca164a5b1046753bb
Autor:
Daniele Telloni, Luca Sorriso-Valvo, Gary P. Zank, Marco Velli, Vincenzo Andretta, Denise Perrone, Raffaele Marino, Francesco Carbone, Antonio Vecchio, Laxman Adhikari, Lingling Zhao, Sabrina Guastavino, Fabiana Camattari, Chen Shi, Nikos Sioulas, Zesen Huang, Marco Romoli, Ester Antonucci, Vania Da Deppo, Silvano Fineschi, Catia Grimani, Petr Heinzel, John D. Moses, Giampiero Naletto, Gianalfredo Nicolini, Daniele Spadaro, Marco Stangalini, Luca Teriaca, Michela Uslenghi, Lucia Abbo, Frédéric Auchère, Regina Aznar Cuadrado, Arkadiusz Berlicki, Roberto Bruno, Aleksandr Burtovoi, Gerardo Capobianco, Chiara Casini, Marta Casti, Paolo Chioetto, Alain J. Corso, Raffaella D’Amicis, Yara De Leo, Michele Fabi, Federica Frassati, Fabio Frassetto, Silvio Giordano, Salvo L. Guglielmino, Giovanna Jerse, Federico Landini, Alessandro Liberatore, Enrico Magli, Giuseppe Massone, Giuseppe Nisticò, Maurizio Pancrazzi, Maria G. Pelizzo, Hardi Peter, Christina Plainaki, Luca Poletto, Fabio Reale, Paolo Romano, Giuliana Russano, Clementina Sasso, Udo Schühle, Sami K. Solanki, Leonard Strachan, Thomas Straus, Roberto Susino, Rita Ventura, Cosimo A. Volpicelli, Joachim Woch, Luca Zangrilli, Gaetano Zimbardo, Paola Zuppella
Publikováno v:
The Astrophysical Journal Letters, Vol 973, Iss 2, p L48 (2024)
This Letter reports the first observation of the onset of fully developed turbulence in the solar corona. Long time series of white-light coronal images, acquired by Metis aboard Solar Orbiter at 2 minutes cadence and spanning about 10 hr, were studi
Externí odkaz:
https://doaj.org/article/6c8598bc13d74094922c0ea14ba645f3
Autor:
Chen Shi, Marco Velli, Gabor Toth, Kun Zhang, Anna Tenerani, Zesen Huang, Nikos Sioulas, Bart van der Holst
Publikováno v:
The Astrophysical Journal Letters, Vol 964, Iss 2, p L28 (2024)
Parker Solar Probe observations reveal that the near-Sun space is almost filled with magnetic switchbacks (“switchbacks” hereinafter), which may be a major contributor to the heating and acceleration of solar wind. Here, for the first time, we de
Externí odkaz:
https://doaj.org/article/90d796cc096c48518147591e12ebc46d
Autor:
Tamar Ervin, Stuart D. Bale, Samuel T. Badman, Trevor A. Bowen, Pete Riley, Kristoff Paulson, Yeimy J. Rivera, Orlando Romeo, Nikos Sioulas, Davin Larson, Jaye L. Verniero, Ryan M. Dewey, Jia Huang
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 129 (2024)
During Parker Solar Probe (Parker) Encounter 15 (E15), we observe an 18 hr period of near-subsonic ( M _S ∼ 1) and sub-Alfvénic (SA), M _A ⋘ 1, slow-speed solar wind from 22 to 15.6 R _⊙ . As the most extreme SA interval measured to date and s
Externí odkaz:
https://doaj.org/article/fe1acfe2f26a4915be29aab090f24bc6
Autor:
Zesen Huang, Nikos Sioulas, Chen Shi, Marco Velli, Trevor Bowen, Nooshin Davis, B. D. G. Chandran, Lorenzo Matteini, Ning Kang, Xiaofei Shi, Jia Huang, Stuart D. Bale, J. C. Kasper, Davin E. Larson, Roberto Livi, P. L. Whittlesey, Ali Rahmati, Kristoff Paulson, M. Stevens, A. W. Case, Thierry Dudok de Wit, David M. Malaspina, J. W. Bonnell, Keith Goetz, Peter R. Harvey, Robert J. MacDowall
Publikováno v:
The Astrophysical Journal Letters, Vol 950, Iss 1, p L8 (2023)
The trace magnetic power spectrum in the solar wind is known to be characterized by a double power law at scales much larger than the proton gyro-radius, with flatter spectral exponents close to −1 found at the lower frequencies below an inertial r
Externí odkaz:
https://doaj.org/article/33c34356d4694432afa015931f33dbf6
Autor:
Nikos Sioulas, Zesen Huang, Chen Shi, Marco Velli, Anna Tenerani, Trevor A. Bowen, Stuart D. Bale, Jia Huang, Loukas Vlahos, L. D. Woodham, T. S. Horbury, Thierry Dudok de Wit, Davin Larson, Justin Kasper, Christopher J. Owen, Michael L. Stevens, Anthony Case, Marc Pulupa, David M. Malaspina, J. W. Bonnell, Roberto Livi, Keith Goetz, Peter R. Harvey, Robert J. MacDowall, Milan Maksimović, P. Louarn, A. Fedorov
Publikováno v:
The Astrophysical Journal Letters, Vol 943, Iss 1, p L8 (2023)
Parker Solar Probe and Solar Orbiter data are used to investigate the radial evolution of magnetic turbulence between 0.06 ≲ R ≲ 1 au. The spectrum is studied as a function of scale, normalized to the ion inertial scale d _i . In the vicinity of
Externí odkaz:
https://doaj.org/article/054401ce922042cfb3265adf540a5a34
Autor:
Nikos Sioulas, Marco Velli, Zesen Huang, Chen Shi, Trevor A. Bowen, B. D. G. Chandran, Ioannis Liodis, Nooshin Davis, Stuart D. Bale, T. S. Horbury, Thierry Dudok de Wit, Davin Larson, Michael L. Stevens, Justin Kasper, Christopher J. Owen, Anthony Case, Marc Pulupa, David M. Malaspina, Roberto Livi, Keith Goetz, Peter R. Harvey, Robert J. MacDowall, John W. Bonnell
Publikováno v:
The Astrophysical Journal, Vol 951, Iss 2, p 141 (2023)
We analyze a merged Parker Solar Probe (PSP) and Solar Orbiter (SO) data set covering heliocentric distances 13 R _⊙ ≲ R ≲ 220 R _⊙ to investigate the radial evolution of power and spectral index anisotropy in the wavevector space of solar wi
Externí odkaz:
https://doaj.org/article/8113060c6afd47a3ad4771b5b3e681bf
Autor:
Nooshin Davis, B. D. G. Chandran, T. A. Bowen, S. T. Badman, T. Dudok de Wit, C. H. K. Chen, S. D. Bale, Zesen Huang, Nikos Sioulas, Marco Velli
Publikováno v:
The Astrophysical Journal, Vol 950, Iss 2, p 154 (2023)
The power spectrum of magnetic field fluctuations in the fast solar wind ( V _SW > 500 km s ^−1 ) at magnetohydrodynamic scales is characterized by two different power laws on either side of a break frequency f _b . The low-frequency range at frequ
Externí odkaz:
https://doaj.org/article/e44033fcd63c44ecadd8f54e97b407d8
Autor:
Chen Shi, Marco Velli, Roberto Lionello, Nikos Sioulas, Zesen Huang, Jasper S. Halekas, Anna Tenerani, Victor Réville, Jean-Baptiste Dakeyo, Milan Maksimović, Stuart D. Bale
Publikováno v:
The Astrophysical Journal, Vol 944, Iss 1, p 82 (2023)
The heating and acceleration of the solar wind remains one of the unsolved fundamental problems in heliophysics. It is usually observed that the proton temperature T _i is highly correlated with the solar wind speed V _SW , while the electron tempera
Externí odkaz:
https://doaj.org/article/040c7f6a065141d89d7d1a27c9d89466
We investigate dispersive and kinetic effects on the evolution of a two-dimensional kinked Alfv\'en wave packet by comparing results from MHD, Hall-MHD and hybrid simulations of a low-$\beta$ plasma. We find that the Hall term determines the overall
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8cdc24618df8318cd819041e67ae66af
http://arxiv.org/abs/2302.06150
http://arxiv.org/abs/2302.06150
