scholarly journals Solar corona during the total solar eclipse of August 1, 2008 and polar magnetic fields of the Sun

2015 ◽  
Vol 52 (1) ◽  
pp. 23-27
Author(s):  
M. Pishkalo ◽  
Keyword(s):  
Magnetic Fields ◽  
Solar Corona ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
The Sun ◽  
Polar Magnetic Fields

scholarly journals Polarization of white-light solar corona and sky polarization effect during total solar eclipse on March 29, 2006

2019 ◽  
pp. 83-87 ◽  
Author(s):  
V. Merzlyakov ◽  
Ts. Tsvetkov ◽  
L. Starkova ◽  
R. Miteva
Keyword(s):  
Solar Corona ◽  
Solar Eclipse ◽  
White Light ◽  
Linear Dependence ◽  
Polarization Effect ◽  
Thomson Scattering ◽  
Total Solar Eclipse ◽  
Degree Of Polarization ◽  
The Sun ◽  
Eclipse Observations

Ground-based total solar eclipse observations are still the key method for coronal investigations. The question about its white-light degree of polarization remains unanswered. There are hypotheses claiming that the degree of polarization in certain regions of the corona may be higher than the maximal theoretically predicted value determined by Thomson scattering. We present polarization of the white-light solar corona observations obtained by three different teams during the March 29, 2006 solar total eclipse. We give an interpretation on how the polarization of the sky impacts brightness of the polarized solar corona, depending on the landscape during the totality. Moreover, it is shown that the singular polarization points of the corona are in linear dependence with the height of the Sun above the horizon.

scholarly journals Corona during the total solar eclipse on March 20, 2015, and 24 cycle development

2016 ◽  
Vol 2 (2) ◽  
pp. 3-14
Author(s):  
Сергей Язев ◽  
Sergey Yazev ◽  
Александр Мордвинов ◽  
Aleksandr Mordvinov ◽  
Антонина Дворкина-Самарская ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Solar Eclipse ◽  
Large Scale ◽  
Magnetic Activity ◽  
Total Solar Eclipse ◽  
Asynchronous Development ◽  
Current Cycle ◽  
Polar Magnetic Fields ◽  
Using Data ◽  
Northern And Southern Hemispheres

We analyzed the structure of coronal features, using data on the March 20, 2015 total solar eclipse. The Ludendorff index characterizing the flattening of the corona is 0.09. The solar corona structure in the Northern and Southern hemispheres corresponds to the maximum and post-maximum phases of solar activity, respectively. The asynchronous development of magnetic activity in the Sun’s Northern and Southern hemispheres caused a substantial asymmetry of coronal features observed at the reversal of polar magnetic fields in the current cycle. The polar ray structures in the Southern Hemisphere are associated with the polar coronal hole, while in the Northern Hemisphere a polar hole has not been formed yet. We examine the relation between large-scale magnetic fields and location of high coronal structures.

scholarly journals Corona during the total solar eclipse on March 20, 2015, and 24 cycle development

2016 ◽  
Vol 2 (2) ◽  
pp. 3-11
Author(s):  
Сергей Язев ◽  
Sergey Yazev ◽  
Александр Мордвинов ◽  
Aleksandr Mordvinov ◽  
Антонина Дворкина-Самарская ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Solar Eclipse ◽  
Large Scale ◽  
Total Solar Eclipse ◽  
Asynchronous Development ◽  
Current Cycle ◽  
Corona Structure ◽  
Polar Magnetic Fields ◽  
Using Data ◽  
Northern And Southern Hemispheres

We analyzed the structure of coronal features, using data on the March 20, 2015 total solar eclipse. The Ludendorff index characterizing the flattening of the corona is 0.09. The solar corona structure in the Northern and Southern hemispheres corresponds to the maximum and post-maximum phases of solar activity, respectively. The asynchronous development of mag-netic activity in the Sun’s Northern and Southern hemi-spheres caused a substantial asymmetry of coronal features observed at the reversal of polar magnetic fields in the current cycle. The polar ray structures in the Southern Hemisphere are associated with the polar cor-onal hole, while in the Northern Hemisphere a polar hole has not been formed yet. We examine the relation between large-scale magnetic fields and location of high coronal structures.

Expeditions for the observation in Sobral, Brazil, of the May 29, 1919 total solar eclipse

2018 ◽  
Vol 27 (11) ◽  
pp. 1843004 ◽  
Author(s):  
Luís C. B. Crispino
Keyword(s):  
General Relativity ◽  
Solar Corona ◽  
Solar Eclipse ◽  
Atmospheric Electricity ◽  
Total Solar Eclipse ◽  
The Other ◽  
The Sun ◽  
Carnegie Institution ◽  
National Observatory ◽  
Light Rays

I report on the three expeditions organized to observe, in the Brazilian State of Ceará, the total solar eclipse on May 29, 1919. Apart from the well-known British expedition, which aimed to perform measurements of the bending of stellar light rays passing near the Sun, resulting in the confirmation of Einstein’s Theory of General Relativity, there were two other expeditions in that occasion. One has been a Brazilian expedition, organized by the National Observatory, with the aim of studying the solar corona. The other has been a North-American expedition, organized by the Carnegie Institution, aiming to perform measurements related to terrestrial magnetism and atmospheric electricity.

FeXIV Line Emission Polarization of the July 11, 1991 Solar Corona

1994 ◽  
Vol 144 ◽  
pp. 541-547
Author(s):  
J. Sýkora ◽  
J. Rybák ◽  
P. Ambrož
Keyword(s):  
High Resolution ◽  
Solar Corona ◽  
Emission Line ◽  
Solar Eclipse ◽  
White Light ◽  
Preliminary Analysis ◽  
Line Emission ◽  
Total Solar Eclipse ◽  
Degree Of Polarization ◽  
High Resolution Images

AbstractHigh resolution images, obtained during July 11, 1991 total solar eclipse, allowed us to estimate the degree of solar corona polarization in the light of FeXIV 530.3 nm emission line and in the white light, as well. Very preliminary analysis reveals remarkable differences in the degree of polarization for both sets of data, particularly as for level of polarization and its distribution around the Sun’s limb.

scholarly journals Observations of the solar corona during the total solar eclipse on 21 August 2017

2017 ◽  
Vol 1 (1) ◽  
pp. 68-71 ◽  
Author(s):  
Hui Tian ◽  
◽  
ZhongQuan Qu ◽  
YaJie Chen ◽  
LinHua Deng ◽  
...  
Keyword(s):  
Solar Corona ◽  
Solar Eclipse ◽  
Total Solar Eclipse

Polarization neutral point pairs of the solar corona and the lunar disc observed during the total solar eclipse on 11 August 1999 in Hungary

2021 ◽  
Vol 60 (13) ◽  
pp. 3609
Author(s):  
Gábor Horváth ◽  
Judit Slíz-Balogh ◽  
István Pomozi ◽  
György Kriska
Keyword(s):  
Solar Corona ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Neutral Point

scholarly journals Public Information Project of the Total Solar Eclipse of November 3, 1994 in Paraná State, Brazil

1998 ◽  
Vol 162 ◽  
pp. 197-201
Author(s):  
R.H. Trevisan
Keyword(s):  
Solar Eclipse ◽  
Science Classroom ◽  
Public Information ◽  
Total Solar Eclipse ◽  
The Sun ◽  
Rio Grande Do Sul ◽  
School Teachers ◽  
Primary School Teachers ◽  
The World ◽  
Information Project

This project had two principal objectives: to communicate safe methods to observe the Sun, so as to prevent ophthalmological accidents to people during the total solar eclipse of 3rd November 1994, and to collaborate with the primary school teachers in the science classroom, illustrating the classes, motivating the students to observe sky phenomena.In January 1993, a commission called “ECLIPSE 94“Executive Commission, of the Brazilian Astronomical Society was created to coordinate assistance with arrangements for observing the total solar eclipse of 3rd November 1994, that in Brazil was total in the western part of Paraná State, in Santa Catarina State and in a Rio Grande do Sul zone. Professional astronomers from Brazil and from several parts of the world were mobilized to observe this eclipse.

Sign in / Sign up

Export Citation Format

Share Document