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Agile Development of Science Operations: The Solar Orbiter Experience
García-Reinaldos, María; Marcos, José; Sánchez, Luis
Cost and schedule are very rigid external constraints for the development of a Science Operations Centre (SOC), as typically the SOC is not considered a critical item for launch and cost and schedule depend on the overall project. Therefore, the greatest degree of flexibility in SOC development is the scope: while we aim to satisfy all the high le…
On the unexpected geomagnetic storm on june 8, 2019, and the heliospheric current sheet effect
Augusto, C. R. A.; Navia, C. E.; de Oliveira, M. N. +1 more
A period of minimum magnetic solar activity (such as June 2019) favors the observation of rare solar transient events, which would otherwise be lost in the magnetic vortex during a period of maximum solar activity. In this paper, we show that the most plausible explanation for the origin of an unexpected geomagnetic storm on June 8, 2019, is a sma…
Numerical simulation of ion reflection by lunar crustal magnetic fields
Divin, Andrey; Deca, Jan; Lue, Charles +1 more
We investigate the dynamics of solar wind - Moon interaction by means of large-scale Particle-in-Cell (PIC) simulations in this study. Implicit moment PIC method and open boundaries are implemented in the code (iPIC3D) allowing to use large-scale domains in three dimensions. Even though the Moon has no global dipolar magnetic field, satellite magn…
Steerable High-Gain Dual-Reflector Antenna at X-Band for Solar Orbiter
Martinez, Victor Sanchez; Jimenez, Fernando Martin; Baladron, Inaki Pinto +7 more
Search for the Relationship between the Velocity of a Coronal Mass Ejection and the Decay Rate of the Magnetic Field in the Region of Mass Emission Generation
Fainshtein, V. G.; Rudenko, G. V.; Zagainova, Yu. S.
In this paper, we search for the relationship between the Vlin linear projection velocity and the Vss velocity in the 3D space of coronal mass ejections (CMEs) recorded by LASCO coronagraphs with an "n" decay rate of the transverse component of the Bt magnetic field above the polarity inversion line (PIL) of the ph…
Some notes concerning open clusters and GAIA DR2 data
Loktin, Alexander Vasilievich; Popova, Maria Erikovna
Issues in applying the Gaia DR2 data to determine the main parameters of open star clusters and the use of a formal, two color diagram for the initial selection of cluster members are discussed. The possibility of using the catalog estimates of interstellar absorption is considered. It has been shown that these estimates correlate with the E(B - V…
The Emission-Line Dusty Object IRAS 07080+0605, A Less-Evolved Example of the Red Rectangle
Miroshnichenko, A. S.; Manset, N.; Zharikov, S. V. +11 more
The all-sky survey conducted by the InfraRed Astronomical Satellite (IRAS) in the 1980's discovered many objects with infrared excesses whose nature has not been explored until recently. IRAS07080+0605 is one of those identified in the visual spectral range with an early-type star, which shows the B[e] phenomenon. The object is puzzling, because i…
High-resolution optical spectroscopy of Nova V392 Per
Stoyanov, K. A.; Georgiev, S.; Stateva, I. +1 more
Here we analyze high-resolution spectra of the Nova V392 Per obtained during the 2018 outburst. The Hα and Hβ emission lines show a triple-peak structure with radial velocities of about -2000 km/s, -250 km/s and 1900 km/s respectively. The near infrared spectrum is dominated by the narrow and single-peaked Paschen lines of hydrogen and the O I λ84…
Eye of a skull reveals details of cometary materials
Asphaug, Erik
The Philae spacecraft was meant to anchor itself to the surface of the comet 67P/Churyumov-Gerasimenko, but instead bounced into a hidden grotto. The telltale markings of its passage reveal details of the comet's fragile boulders.
Some kinematics of halo coronal mass ejections
Chandra, Ramesh; Verma, Virendra Kumar; Mittal, Nishant
We present an investigation of halo coronal mass ejections (HCMEs) kinematics and other facts about the HCMEs. The study of HCMEs is very important because HCMEs are regarded as the main causes of heliospheric and geomagnetic disturbances. In this study, we have investigated 313 HCMEs observed during 1996-2012 by LASCO, coronal holes, and solar fl…