Results 11 to 20 of about 353,818 (294)
GLOBAL DYNAMICS OF SUBSURFACE SOLAR ACTIVE REGIONS [PDF]
The Astrophysical Journal, 2012 We present three-dimensional numerical simulations of a magnetic loop evolving in either a convectively stable or unstable rotating shell. The magnetic loop is introduced in the shell in such a way that it is buoyant only in a certain portion in longitude, thus creating an -loop.
Jouve, L., Brun, A.S., Aulanier, G.
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DISTRIBUTION OF ELECTRIC CURRENTS IN SOLAR ACTIVE REGIONS [PDF]
The Astrophysical Journal, 2014 6 pages, 5 figures, to appear in Astrophysical Journal ...
Török, T. +8 more
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Recurrent solar jets in active regions [PDF]
Astronomy and Astrophysics, 2010 We study the emergence of a toroidal flux tube into the solar atmosphere and its interaction with a pre-existing field of an active region. We investigate the emission of jets as a result of repeated reconnection events between colliding magnetic fields.
Archontis, V. +2 more
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SOLAR TRANSITION REGION IN THE QUIET SUN AND ACTIVE REGIONS
, 2010 The solar transition region (TR), in which above the photosphere the tempera- ture increases rapidly and the density drops dramatically, is believed to play an important role in coronal heating and solar wind acceleration. Long-lasting up-flows are present in the upper TR and interpreted as signatures of mass supply to large coronal loops in the quiet ...
Tian, H., Curdt, W., He, J. -S.
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Sympathetic Partial Filament Eruptions Caused by the Interaction between Two Nearby Filaments
The Astrophysical Journal, 2023 To better understand the physical connections in sympathetic solar eruptions, we investigated the interaction between two nearby filaments and their successive partial eruptions in the active region (AR) NOAA 12866 on 2021 September 9 by using data from ...
Liping Yang +9 more
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Dynamics of solar active regions [PDF]
Astronomy & Astrophysics, 2005 We present new results of an international joint observing campaign, which was carried out in September 2000 to study the oscillatory behaviour of solar active regions. We concentrate on oscillations in the lower layers of the solar atmosphere as observed with the Michelson Doppler Imager (MDI, Scherrer et al. 1995, Sol. Phys., 162, 129). The resulting
K. Muglach, A. Hofmann, J. Staude
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The Astrophysical Journal, 2023 Although magnetic reconnection plays a key role in the formation of a solar filament, the detailed formation process is still ambiguous. Combining the observational data from the New Vacuum Solar Telescope and the Solar Dynamics Observatory, we analyzed ...
Liping Yang +9 more
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Magnetohydrodynamic Seismology of Quiet Solar Active Regions [PDF]
The Astrophysical Journal Letters, 2019 Abstract The ubiquity of recently discovered low-amplitude decayless kink oscillations of plasma loops allows for the seismological probing of the corona on a regular basis. In particular, in contrast to traditionally applied seismology that is based on the large-amplitude decaying kink oscillations excited by flares and eruptions ...
Sergey A. Anfinogentov, V. M. Nakariakov
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Evolution of Elemental Abundances in Hot Active Region Cores from Chandrayaan-2 XSM Observations
The Astrophysical Journal, 2023 The first ionization potential (FIP) bias, whereby elemental abundances for low-FIP elements in different coronal structures vary from their photospheric values and may also vary with time, has been widely studied.
Biswajit Mondal +7 more
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Dynamics of solar active regions [PDF]
Astronomy & Astrophysics, 2003 I present results of an international joint observing campaign, which was carried out in September 1999 and 2000, to study the oscillatory behaviour of active regions (ARs). In this contribution I will concentrate on oscillations in the higher layers of the solar atmosphere as observed with the UV filters of the Transition Region and Coronal Explorer ...
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