- Dynamics of Large-scale Coronal Structures
as Imaged during the 2012 and 2013 Total Solar Eclipses.
Nathalia Alzate1, Shadia R. Habbal2,
Miloslav Druckmüller3,
Constantinos Emmanouilidis4,
and Huw Morgan5
Published 2017 October 17 • © 2017. The American Astronomical Society. All rights reserved.
-The Astrophysical Journal, Volume 848, Number 2.
"....... Eclipse Observations and Ancillary Space-based Data.
The total solar eclipse white light images of 2012 and 2013, acquired by C. Emmanouilidis and processed by M. Druckmüller, are shown in Figures 1 and 2, respectively. Totality started at 20:37:39 UT on 2012 November 13 in Australia, when the Sun was at 13° above the horizon. A modified Canon 5D Mark I with an extended sensitivity in the red (in particular, for Hα) was used, with a Takahashi TSA102 refracting telescope with a 102 mm f/8 aperture and a Takahashi TOA-35 coma corrector. The image shown in Figure 1 is a composite of a sequence of exposure times ranging from 1/1000 to 8 s. On 2013 November 3, totality started at 13:52:40 UT in Gabon when the Sun was 45° above the horizon. A Takahashi FSQ-106 astrograph refracting telescope with a 106 mm f/5 aperture was used with a Nikon D7100, with exposure times ranging from 1/2000 to 8 s, which yielded the corresponding 2013 image (see Figure 2). A second wider-field telescope was also used. It consisted of a Takahashi FS-60C refracting telescope with a 60 mm f/6 aperture and its dedicated coma corrector. The telescope was attached to a modified Canon 350D DSLR camera to provide an extended sensitivity in the red and Hα. It provided the inset in Figure 2. ......"
Little Eyes on Large Solar Motions!
Me and a team of world leading experts in Solar physics, announced the discovery of two atypical large scale structures in the Sun's corona in a scientific paper that was published this month in The Astrophysical Journal. Later on it was selected as Research Highlight on AAS Nova web page!
With these data we proved that the Corona activity is much more intense than previously thought because high resolution images during the Solar maximum provided the missing pieces from the puzzle between two space observatories (SDO and SOHO) that can't image coronal features near the Sun's limb.
Contributing to real science isn't easy and definitely not always a fun process. Participating in a team with world experts on Solar Corona image processing and Solar Physics scientists is both an honour and a unique learning process. Kudos to all for this remarkable achievement!
Observations from small telescopes have provided this beautiful view of the solar corona during a solar eclipse in 2013. These data have helped researchers better understand what shapes the large-scale structure in the corona. [Alzate et al. 2017]
http://aasnova.org/2017/10/25/little-eyes-on-large-solar-motions/
By Susanna Kohler on
Images taken during the solar eclipse in 2012. The central color composite of the eclipsed solar surface was captured by SDO, the white-light view of the solar corona around it was taken by the authors, and the background, wide-field black-and-white view is from LASCO. The white arrows mark the “atypical” structure. [Alzate et al. 2017]
Same as the previous figure, but for the eclipse in 2013. [Alzate et al. 2017]
It seems like science is increasingly being done with advanced detectors on enormous ground- and space-based telescopes. One might wonder: is there anything left to learn from observations made with digital cameras mounted on ~10-cm telescopes?
The answer is yes — plenty! Illustrating this point, a new study using such equipment recently reports on the structure and dynamics of the Sun’s corona during two solar eclipses.
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