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19942026
most citedCosmic-ray propagation and interactions in the Galaxy

1.2k citations

Showing 2019 · astro-ph.SRShow all

7 papers · 2 filters

astro-ph.SR2019★ 36 cited

Peculiar solar sources and geospace disturbances on 20-26 August 2018

A. A. Abunin, M. A. Abunina, A. V. Belov +1

On the approach to minimum of Solar Cycle 24, on 26 August 2018, an unexpectedly strong geomagnetic storm (GMS) suddenly occurred. Its Dst index reached -174 nT, that is the third…

astro-ph.SR2019★ 23 cited

Spectral characteristic of mid-term quasi-periodicities in sunspots data

P. Frick, D. Sokoloff, R. Stepanov +2

Numerous analyses suggest the existence of various quasi-periodicities in solar activity. The power spectrum of solar activity recorded in sunspot data is dominated by the 11…

astro-ph.SR2019★ 14 cited

Properties of local oscillations in the lower sunspot atmosphere

Robert Sych, Yuzef Zhugzhda, Xiaoli Yan

We present a study of wave processes in the sunspot region NOAA 12670 on 2017 August 10 observed by the Goode Solar Telescope in the TiO 7057 A and Ha 6563 A spectral lines. To stu…

astro-ph.SR2019★ 6 cited

Direct Observations of Traveling Ionospheric Disturbances as Focusers of Solar Radiation: Spectral Caustics

Artem Koval, Yao Chen, Takuya Tsugawa +9

The solar radiation focusing effect is related to the specific phenomenon of propagation of the Sun-emitted HF and VHF waves through terrestrial ionosphere. This natural effect is…

astro-ph.SR2019★ 9 cited

Difference of source regions between fast and slow coronal mass ejections

B. Filippov

Coronal mass ejections (CMEs) are tightly related to filament eruptions and usually are their continuation in the upper solar corona. It is common practice to divide all observed C…

astro-ph.SR2019★ 3 cited

Improvements of the Longitudinal Magnetic Field Measurement from the Solar Magnetic Field Telescope at Huairou Solar Observing Station

Andrei Plotnikov, Alexander Kutsenko, Shanbin Yang +4

The weak-field approximation implying linear relationship between Stokes and longitudinal magnetic field, , often suffers from saturation observed in strong magnet…

astro-ph.SR2019★ 14 cited

A short and sudden increase of the magnetic field strength and the accompanying spectral variability in the O9.7V star HD54879

S. Hubrig, M. Kueker, S. P. Jarvinen +4

Only eleven O-type stars have been confirmed to possess large-scale organized magnetic fields. The presence of a -600G longitudinal magnetic field in the O9.7V star HD54879 with a…