10 research outputs found
Deep Learning for Space Weather Prediction: Bridging the Gap between Heliophysics Data and Theory
Traditionally, data analysis and theory have been viewed as separate
disciplines, each feeding into fundamentally different types of models. Modern
deep learning technology is beginning to unify these two disciplines and will
produce a new class of predictively powerful space weather models that combine
the physical insights gained by data and theory. We call on NASA to invest in
the research and infrastructure necessary for the heliophysics' community to
take advantage of these advances.Comment: Heliophysics 2050 White Pape
Redefining flux ropes in heliophysics
Magnetic flux ropes manifest as twisted bundles of magnetic field lines. They carry significant amounts of solar mass in the heliosphere. This paper underlines the need to advance our understanding of the fundamental physics of heliospheric flux ropes and provides the motivation to significantly improve the status quo of flux rope research through novel and requisite approaches. It briefly discusses the current understanding of flux rope formation and evolution, and summarizes the strategies that have been undertaken to understand the dynamics of heliospheric structures. The challenges and recommendations put forward to address them are expected to broaden the in-depth knowledge of our nearest star, its dynamics, and its role in its region of influence, the heliosphere.Fil: Nieves Chinchilla, Teresa. National Aeronautics and Space Administration; Estados UnidosFil: Pal, Sanchita. George Mason University. School Of Physics. Astronomy And Computational Sciences; Estados Unidos. National Aeronautics and Space Administration; Estados UnidosFil: Salman, Tarik M.. George Mason University. School Of Physics. Astronomy And Computational Sciences; Estados Unidos. National Aeronautics and Space Administration; Estados UnidosFil: Carcaboso, Fernando. Catholic University Of America; Estados Unidos. National Aeronautics and Space Administration; Estados UnidosFil: Guidoni, Silvina E.. American University. College Of Arts & Sciences. Physics Departament.; Estados Unidos. National Aeronautics and Space Administration; Estados UnidosFil: Cremades Fernandez, Maria Hebe. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; Argentina. Universidad de Mendoza. Facultad de Ingenieria; ArgentinaFil: Narock, Ayris. National Aeronautics and Space Administration; Estados UnidosFil: Balmaceda, Laura Antonia. George Mason University. School Of Physics. Astronomy And Computational Sciences; Estados Unidos. National Aeronautics and Space Administration; Estados Unidos. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; ArgentinaFil: Lynch, Benjamin J.. University of California at Berkeley; Estados UnidosFil: Al Haddad, Nada. University Of New Hampshire; Estados UnidosFil: RodrĂguez GarcĂa, Laura. Universidad de Alcalá; EspañaFil: Narock, Thomas W.. Goucher College; Estados UnidosFil: Dos Santos, Luiz F. G.. Shell Global Solutions; Estados UnidosFil: Regnault, Florian. University Of New Hampshire; Estados UnidosFil: Kay, Christina. Catholic University Of America; Estados Unidos. National Aeronautics and Space Administration; Estados UnidosFil: Winslow, RĂ©ka M.. University Of New Hampshire; Estados UnidosFil: Palmerio, Erika. Predictive Science Inc.; Estados UnidosFil: Davies, Emma E.. University Of New Hampshire; Estados UnidosFil: Scolini, Camilla. University Of New Hampshire; Estados UnidosFil: Weiss, Andreas J.. National Aeronautics and Space Administration; Estados UnidosFil: Alzate, Nathalia. National Aeronautics and Space Administration; Estados UnidosFil: Jeunon, Mariana. Catholic University Of America; Estados Unidos. National Aeronautics and Space Administration; Estados UnidosFil: Pujadas, Roger. Universidad PolitĂ©cnica de Catalunya; España. National Aeronautics and Space Administration; Estados Unido
Effect of multiple substorms on the buildup of the ring current
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/95361/1/jgra17662.pd
Source and Propagation of a Streamer Blowout Coronal Mass Ejection Observed by the Parker Solar Probe
Helionauts: A Cross-Organization Heliophysics Forum
<p>The COVID-19 pandemic highlighted the need for a lasting community-wide discussion platform in the field of Heliophysics, supplementing in-person interactions at conferences and within local departments. To address this, instant messaging apps like Slack and Teams were hastily adopted, but their constant online presence requirements posed problems: overlapping content and information sprawl across various chat workspaces, confusion about where discussions should take place. To provide a more coherent landscape for written communication, NASA is backing Helionauts.org, a permanent platform for heliophysicists. It features topic-based and searchable discussions, smart notifications for asynchronous conversations, and supports technical conversations with Markdowns, LaTeX, and code syntax highlighting. The platform fosters inclusivity, connecting experts, postdocs, and students to promote knowledge-sharing and collaboration in our heliophysics community. </p>
Analysis of the Internal structure of the Streamer Blow Out Observed by the Parker Solar Probe during the First Solar Encounter
Direct First PSP Observation of the Interaction of Two Successive Interplanetary Coronal Mass Ejections in November 2020
We investigate the effects of the evolutionary processes in the internal
magnetic structure of two interplanetary coronal mass ejections (ICMEs)
detected in situ between 2020 November 29 and December 1 by Parker Solar Probe
(PSP). The sources of the ICMEs were observed remotely at the Sun in EUV and
subsequently tracked to their coronal counterparts in white light. This period
is of particular interest to the community since it has been identified as the
first widespread solar energetic particle event of Solar Cycle 25. The
distribution of various solar and heliospheric-dedicated spacecraft throughout
the inner heliosphere during PSP observations of these large-scale magnetic
structures enables a comprehensive analysis of the internal evolution and
topology of such structures. By assembling different models and techniques, we
identify the signatures of interaction between the two consecutive ICMEs and
the implications for their internal structure. We use multispacecraft
observations in combination with a remote-sensing forward modeling technique,
numerical propagation models, and in-situ reconstruction techniques. The
outcome, from the full reconciliations, demonstrates that the two CMEs are
interacting in the vicinity of PSP. Thus, we identify the in-situ observations
based on the physical processes that are associated with the interaction and
collision of both CMEs. We also expand the flux rope modeling and in-situ
reconstruction technique to incorporate the aging and expansion effects in a
distorted internal magnetic structure and explore the implications of both
effects in the magnetic configuration of the ICMEs
Analysis of the Internal Structure of the Streamer Blowout Observed by the Parker Solar Probe During the First Solar Encounter
International audienceIn this paper, we present an analysis of the internal structure of a coronal mass ejection (CME) detected by in situ instruments on board the Parker Solar Probe (PSP) spacecraft during its first solar encounter. On 2018 November 11 at 23:53 UT, the FIELDS magnetometer measured an increase in strength of the magnetic field as well as a coherent change in the field direction. The SWEAP instrument simultaneously detected a low proton temperature and signatures of bidirectionality in the electron pitch angle distribution (PAD). These signatures are indicative of a CME embedded in the slow solar wind. Operating in conjunction with PSP was the STEREO A spacecraft, which enabled the remote observation of a streamer blowout by the SECCHI suite of instruments. The source at the Sun of the slow and well-structured flux rope was identified in an overlying streamer, the details of which are described in Korreck et al. Our detailed inspection of the internal transient structure magnetic properties suggests high complexity in deviations from an ideal flux rope 3D topology. Reconstructions of the magnetic field configuration reveal a highly distorted structure consistent with the highly elongated "bubble" observed remotely. A double-ring substructure observed in the SECCHI-COR2 field of view (FOV) is suggestive of a double internal flux rope. Furthermore, we describe a scenario in which mixed topology of a closed flux rope is combined with the magnetically open structure, which helps explain the flux dropout observed in the measurements of the electron PAD. Our justification for this is the plethora of structures observed by the EUV imager (SECCHI-EUVI) in the hours preceding the streamer blowout evacuation. Finally, taking advantage of the unique observations from PSP, we explore the first stages of the effects of coupling with the solar wind and the evolutionary processes in the magnetic structure. We found evidence of bifurcated current sheets in the structure boundaries, suggestive of magnetic reconnection. Our analysis of the internal force imbalance indicates that internal Lorentz forces continue to dominate the evolution of the structure in the COR2 FOV and serve as the main driver of the internal flux rope distortion detected in situ at PSP solar distance