Zobrazeno 1 - 10
of 2 733
pro vyhledávání: '"Lapenta AS"'
Electron-only reconnection is a process recently observed in the Earth's magnetosheath, where magnetic reconnection occurs at electron kinetic scales with only electrons involved. Electron-only reconnection is likely to have a significant impact on t
Externí odkaz:
http://arxiv.org/abs/2406.10731
Autor:
Pezzini, Luca, Zhukov, Andrei N., Bacchini, Fabio, Arrò, Giuseppe, López, Rodrigo A., Micera, Alfredo, Innocenti, Maria Elena, Lapenta, Giovanni
Publikováno v:
The Astrophysical Journal, 975:37, 2024
The expanding solar wind plasma ubiquitously exhibits anisotropic non-thermal particle velocity distributions. Typically, proton Velocity Distribution Functions (VDFs) show the presence of a core and a field-aligned beam. Novel observations made by P
Externí odkaz:
http://arxiv.org/abs/2405.08196
Autor:
Rodriguez, L., Shukhobodskaia, D., Niemela, A., Maharana, A., Samara, E., Verbeke, C., Magdalenic, J., Vansintjan, R., Mierla, M., Scolini, C., Sarkar, R., Kilpua, E., Asvestari, E., Herbst, K., Lapenta, G., Chaduteau, A. D., Pomoell, J., Poedts, S.
Publikováno v:
A&A 689, A187 (2024)
Aims. We present the validation results for arrival times and geomagnetic impact of Coronal Mass Ejections (CMEs), using the cone and spheromak CME models implemented in EUropean Heliospheric FORecasting Information Asset (EUHFORIA). Validating numer
Externí odkaz:
http://arxiv.org/abs/2405.04637
In this paper, we introduce and discuss an exactly energy-conserving Particle-in-Cell method for arbitrary curvilinear coordinates. The flexibility provided by curvilinear coordinates enables the study of plasmas in complex-shaped domains by aligning
Externí odkaz:
http://arxiv.org/abs/2310.17253
Combining tools from category theory, model theory, and non-standard analysis we extend Baker-Beynon dualities to the classes of all Abelian $\ell$-groups and all Riesz spaces (also known as vector lattices). The extended dualities have a strong geom
Externí odkaz:
http://arxiv.org/abs/2310.13427
We extend nonparametric regression smoothing splines to a context where there is endogeneity and instrumental variables are available. Unlike popular existing estimators, the resulting estimator is one-step and relies on a unique regularization param
Externí odkaz:
http://arxiv.org/abs/2307.14867
Autor:
Arrò, Giuseppe, Pucci, Francesco, Califano, Francesco, Innocenti, Maria Elena, Lapenta, Giovanni
Magnetic holes (MHs) are coherent structures associated with strong magnetic field depressions in magnetized plasmas. They are observed in many astrophysical environments at a wide range of scales but their origin is still under debate. In this work
Externí odkaz:
http://arxiv.org/abs/2306.05874
Autor:
Lapenta, Giovanni
Publikováno v:
Physics, 5, 72-89, 2023
The Energy Conserving semi-implicit method (ECsim), presented by Lapenta in 2017, is a Particle in Cell (PIC) algorithm for the simulation of plasmas. Energy conservation is achieved within a semi-implicit formulation that does not require any non-li
Externí odkaz:
http://arxiv.org/abs/2301.08985
Autor:
McGranaghan, R. M., Thompson, B., Camporeale, E., Bortnik, J., Bobra, M., Lapenta, G., Wing, S., Poduval, B., Lotz, S., Murray, S., Kirk, M., Chen, T. Y., Bain, H. M., Riley, P., Tremblay, B., Cheung, M., Delouille, V.
Three main points: 1. Data Science (DS) will be increasingly important to heliophysics; 2. Methods of heliophysics science discovery will continually evolve, requiring the use of learning technologies [e.g., machine learning (ML)] that are applied ri
Externí odkaz:
http://arxiv.org/abs/2212.13325
Autor:
Lapenta, Elia
This paper provides a specification test for semiparametric models with nonparametrically generated regressors. Such variables are not observed by the researcher but are nonparametrically identified and estimable. Applications of the test include mod
Externí odkaz:
http://arxiv.org/abs/2212.11112