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Exploiting White-Light Observations to Improve Estimates of Magnetic Connectivity
Poirier, Nicolas; Kouloumvakos, Athanasios; Rouillard, Alexis P. +7 more
TheSolar Orbiter(SolO) andParker Solar Probemissions have opened up new challenges for the heliospheric scientific community. Their proximity to the Sun and their high quality measurements allow us to investigate, for the first time, potential sources for the solar wind plasma measuredin situ. More accurate estimates of magnetic connectivities fro…
The distribution of open clusters in the Galaxy
Monteiro, Hektor; Barros, Douglas A.; Lépine, Jacques R. D. +1 more
In this work we explore the new catalog of galactic open clusters that became available recently, containing 1750 clusters that have been re-analysed using the Gaia DR2 catalog to determine the stellar memberships. We used the young open clusters as tracers of spiral arms and determined the spiral pattern rotation speed of the Galaxy and the corot…
Future Prospects for Solar EUV and Soft X-ray Solar Spectroscopy Missions
Young, Peter R.
Future prospects for solar spectroscopy missions operating in the extreme ultraviolet (EUV) and soft X-ray (SXR) wavelength ranges, 1.2--1600~\AA, are discussed. NASA is the major funder of Solar Physics missions, and brief summaries of the opportunities for mission development under NASA are given. Upcoming major solar missions from other nations…
Fifty Years of 3 He-rich Events
Reames, Donald V.
The early 1970s saw a new and surprising feature in the composition of solar energetic particles (SEPs), resonant enhancements up to 10,000-fold in the ratio 3He/4He that could even make 3He dominant over H in rare events. It was soon learned that these events also had enhancements in the abundances of heavier elements, such as a factor of ~10 enh…
The Impact of Turbulence on Physics of the Geomagnetic Tail
Antonova, Elizaveta E.; Stepanova, Marina V.
There is a vast amount of evidence that suggests that the geomagnetic tail is like a turbulent wake behind an obstacle. Large-scale vortices in the wake are able to generate turbulent transport that takes place both along the plasma sheet, in the X and Y directions, and across the plasma sheet, in the Z direction. Thus, turbulent fluctuations in a…
BepiColombo's cruise phase: unique opportunity for synergistic observations
André, N.; Escoubet, C. P.; Müller, D. +31 more
The investigation of multi-spacecraft coordinated observations during the cruise phase of BepiColombo (ESA/JAXA) are reported, with a particular emphasis on the recently launched missions, Solar Orbiter (ESA/NASA) and Parker Solar Probe (NASA). Despite some payload constraints, many instruments onboard BepiColombo are operating during its cruise p…
Impact of foreshock transients on the flank magnetopause and magnetosphere and the ionosphere
Wang, Chih-Ping; Wang, Xueyi; Liu, Terry Z. +1 more
Mesoscale (on the scales of a few minutes and a few RE) magnetosheath and magnetopause perturbations driven by foreshock transients have been observed in the flank magnetotail. In this paper, we present the 3D global hybrid simulation results to show qualitatively the 3D structure of the flank magnetopause distortion caused by foreshock transients…
Stormtime energetics: Energy transport across the magnetopause in a global MHD simulation
Pulkkinen, Tuija I.; Toth, Gabor; Al Shidi, Qusai +1 more
Coupling between the solar wind and magnetosphere can be expressed in terms of energy transfer through the separating boundary known as the magnetopause. Geospace simulation is performed using the Space Weather Modeling Framework (SWMF) of a multi-ICME impact event on February 18-20, 2014 in order to study the energy transfer through the magnetopa…
Investigating width distribution of slow and fast CMEs in solar cycles 23 and 24
Banerjee, D.; Gopalswamy, N.; Patel, R. +3 more
Coronal Mass Ejections (CMEs) are highly dynamic events originating in the solar atmosphere, that show a wide range of kinematic properties and are the major drivers of the space weather. The angular width of the CMEs is a crucial parameter in the study of their kinematics. The fact that whether slow and fast CMEs (as based on their relative speed…
RR Lyrae stars as seen by the Kepler space telescope
Szabó, Róbert; Plachy, Emese
The unprecedented photometric precision along with the quasi-continuous sampling provided by the Kepler space telescope revealed new and unpredicted phenomena that reformed and invigorated RR Lyrae star research. The discovery of period doubling and the wealth of low- amplitude modes enlightened the complexity of the pulsation behavior and guided …