Results 101 to 110 of about 525 (133)

Surges of the weak magnetic field in the photosphere of the Sun

2021
<p>The properties of the magnetic fields of the solar photosphere are investigated, in particular, the distribution of fields of different polarity over the solar surface. As primary data, synoptic maps of the photospheric magnetic field of the Kitt Peak National Solar Observatory for 1978-2016 were used. Using the vector summation method,
Dmitrii Baranov, Elena Vernova, Marta Tyasto   +2 more
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Diagnostics of the Quiet Sun Atmosphere’s Photospheric Jets

Kinematics and Physics of Celestial Bodies, 2019
Abstract—From 2D-spectral observation data of a quiet region of the solar disk center in the Fe I λ 557.609 nm line, 3D hydrodynamic models of photospheric jets are built by solving the inverse radiative transfer problem. The obtained models describe thermodynamic parameters and the complete velocity field (vertical and horizontal).
M. I. Stodilka, A. V. Sukhorukov, A. I. Prysiazhnyi   +2 more
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Some Photospheric Characteristics of the Sun as a Star

1982
Many non- classical solar features are common among stars. Those features influence spectral lines, and for stellar spectra diagnostic one must know how to discern that influence from other peculiarities of stellar spectra. But one can learn a lot about stellar atmospheres by extending what one knows about the Sun.
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A comparison of photospheric, chromospheric and coronal indices for the sun

Advances in Space Research, 1986
Abstract Indices of photospheric activity as reconstructed sunspot blocking (essentially sunspot areas) are compared with the White and Livingston 1A Ca II K index and a polarization-brightness index of the corona that is proportional to mean hemispheric coronal electron density.
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The Large-Scale Structures Of The Quiet-Sun Photosphere

Solar Physics, 2001
The area density distribution of bright photospheric points on the quiet solar surface is not uniform. The distributions show some considerable pecularities. This article is a study of their characteristics during the four last solar activity minima in Bartels longitudes.
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The Spontaneous Concentration of Magnetic Field in the Photosphere of the Sun

1981
Magnetic fields at the surface of the sun exhibit the remarkable property of fragmentation and concentration into separate tubes of 1–2 kilogauss. In newly emerging active regions the separate tubes cluster together to produce the sunspot phenomenon, with the magnetic field compressed further, to 2–4 kilogauss.
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A comparison between photospheric and chromospheric quiet-Sun magnetograms

Solar Physics, 2000
Photospheric (Fe i λ5324.19 A line) and chromospheric (Hβ line) magnetic fields in quiet-Sun regions have been observed in the solar disk center by using the vector video magnetograph at Huairou Solar Observing Station of Beijing Astronomical Observatory.
Mei Zhang, Hongqi Zhang
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Quantifying the sun’s magnetic stress with the photospheric flows

Bulletin of the AAS, 2023
Raphael Attie, Benoit Tremblay, Michael Kirk, Pete Schuck, William, Dean Pesnell, Lisa Upton   +5 more
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Would the Sun's photosphere be negatively charged and magnetized ?

2019
"No satisfactory solution has been found as yet for the unexpectedly small vertical gradients [with respect to the observed ones] obtained by applying the divB=0 condition [to the solar photosphere magnetic field measurements]" (S. Solanki, 2003, Astron. Astrophys. Rev. 11, p. 184).
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Photospheric Network as Energy Source for Quiet Sun Corona

2015
In previous chapters, we studied post-reconnection processes resulted from interaction of photospheric flux tubes, embedded predominantly in nonmagnetic environment. Higher in the atmosphere, magnetic field preserves its filamentary structures, but is surrounded by low beta-magnetized plasma.
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