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  Forbush decreases and < 2-day GCR flux non-recurrent variations studied with LISA Pathfinder

Grimani, C., Armano, M., Audley, H., Baird, J., Benella, S., Binetruy, P., et al. (2019). Forbush decreases and < 2-day GCR flux non-recurrent variations studied with LISA Pathfinder. Astrophysical Journal, 874: 167. doi:10.3847/1538-4357/ab0c99.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-67D4-A Version Permalink: http://hdl.handle.net/21.11116/0000-0003-67D8-6
Genre: Journal Article

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Grimani, C., Author
Armano, M., Author
Audley, H.1, Author              
Baird, J., Author
Benella, S., Author
Binetruy, P., Author
Born, M.1, Author              
Bortoluzzi, D., Author
Castelli, E., Author
Cavalleri, A., Author
Cesarini, A., Author
Cruise, A. M., Author
Danzmann, K.1, Author              
Silva, M. de Deus, Author
Diepholz, I.1, Author              
Dixon, G., Author
Dolesi, R., Author
Fabi, M., Author
Ferraioli, L., Author
Ferroni, V., Author
Finetti, N., AuthorFitzsimons, E. D., AuthorFreschi, M., AuthorGesa, L., AuthorGibert, F., AuthorGiardini, D., AuthorGiusteri, R., AuthorGrzymisch, J., AuthorHarrison, I., AuthorHeinzel, G.1, Author              Hewitson, M.2, Author              Hollington, D., AuthorHoyland, D., AuthorHueller, M., AuthorInchauspé, H., AuthorJennrich, O., AuthorJetzer, P., AuthorKarnesis , N.1, AuthorKaune, B.1, Author              Korsakova, N., AuthorKillow, C. J., AuthorKudela, K., AuthorLaurenza, M., AuthorLobo, J. A., AuthorLloro, I., AuthorLiu, L., AuthorLópez-Zaragoza, J. P., AuthorMaarschalkerweerd, R., AuthorMance, D., AuthorMeshksar, N., AuthorMartín, V., AuthorMartin-Polo, L., AuthorMartino, J., AuthorMartin-Porqueras, F., AuthorMateos, I., AuthorMcNamara, P. W., AuthorMendes, J., AuthorMendes, L., AuthorNofrarias, M., AuthorPaczkowski, S.1, Author              Perreur-Lloyd, M., AuthorPetiteau, A., AuthorPivato, P., AuthorPlagnol, E., AuthorRamos-Castro, J., AuthorReiche, J.1, Author              Robertson, D. I., AuthorRivas, F., AuthorRussano, G., AuthorSlutsky, J., AuthorSopuerta, C. F., AuthorSumner, T., AuthorTelloni, D., AuthorTexier, D., AuthorThorpe, J. I., AuthorVetrugno, D., AuthorVillani, M., AuthorVitale, S., AuthorWanner, G.1, Author              Ward, H., AuthorWass, P., AuthorWeber, W. J., AuthorWissel, L.1, Author              Wittchen, A.1, Author              Zweifel, P., Author more..
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              
2Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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Free keywords: Physics, Space Physics, physics.space-ph, Astrophysics, Earth and Planetary Astrophysics, astro-ph.EP, Astrophysics, Solar and Stellar Astrophysics, astro-ph.SR
 Abstract: Non-recurrent short term variations of the galactic cosmic-ray (GCR) flux above 70 MeV n$^{-1}$ were observed between 2016 February 18 and 2017 July 3 aboard the European Space Agency LISA Pathfinder (LPF) mission orbiting around the Lagrange point L1 at 1.5$\times$10$^6$ km from Earth. The energy dependence of three Forbush decreases (FDs) is studied and reported here. A comparison of these observations with others carried out in space down to the energy of a few tens of MeV n$^{-1}$ shows that the same GCR flux parameterization applies to events of different intensity during the main phase. FD observations in L1 with LPF and geomagnetic storm occurrence is also presented. Finally, the characteristics of GCR flux non-recurrent variations (peaks and depressions) of duration $<$ 2 days and their association with interplanetary structures are investigated. It is found that, most likely, plasma compression regions between subsequent corotating high-speed streams cause peaks, while heliospheric current sheet crossing cause the majority of the depressions.

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 Dates: 2019-04-092019
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1904.04694
DOI: 10.3847/1538-4357/ab0c99
URI: http://arxiv.org/abs/1904.04694
 Degree: -

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Title: Astrophysical Journal
Source Genre: Journal
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Publ. Info: Chicago, IL : University of Chicago Press for the American Astronomical Society
Pages: - Volume / Issue: 874 Sequence Number: 167 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215_2