Fe XI, 789.2 nm
Our expedition observed emission from the following ions in the visible
and near IR wavelength range: Fe IX (435.9 nm), Fe X (637.4 nm),
Fe XI (789.2 nm), Fe XIII (1074.7 nm), Fe XIV (530.3 nm)
and Ni XV (670.2 nm). These emission lines provide an excellent
diagnostic tool
for probing the physics of the solar corona. One of the tools is clear from the following graph.
Fe XI line at 789.2 nm is the most prominent emission line in ner IR of the
coronal spectrum bellow 1000 nm. This line is very interesting because
Fe XI ion is the most
dominant ion of all Fe ions in solar corona.
Click on the image or on the following reference to display the
higher resolution image version (961 KB, PNG format).
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| Image | TSE_2019_Rodeo_FeXI.png |
| Date | 02. 07. 2019 |
| Time | 2nd contact 20:40:01 UT, 3rd contact 20:42:53 UT |
| Place | Rodeo, Argentina |
| Coordinate | S 30° 11.645', W 69° 6.155', Alt. 1550 m |
| Conditions | Clear sky, solar altitude 11.5° above horizon |
| Optics | 2× Achromat 4/300 mm equipped with following narrow band filters:
On-band filter: Andover, center wavelength: 789.2 nm, bandwidth 0.5 nm
Off-band filter: Andover, center wavelength: 786.1 nm, bandwidth 0.5 nm |
| Camera | 2×Atik 414EX |
| Exposure | 0.1 - 12.8 s |
| Processing | Composition of 60 eclipse images (30 On-band and 30 Off-band) taken with two cameras. Images were calibrated by means of dark frames and flat-fields, aligned by means of phase correlation, composed by means of LDIC 6.0 software, continuum was removed from Fe X emission by subtracting the Off-band images. The resulting image was processed using Corona 6.0 software in order to visualize coronal structures. The final processing was done using ACC 6.1 software.
Image processing by Miloslav Druckmüller |
| Software | Astro D3F 2.0, PhaseCorr 7.0, LDIC 6.0, Corona 6.0, Sofo ACC 6.1 |
| Orientation | This image has correct solar North-top orientation |
| Copyright | © 2019 Miloslav Druckmüller, Shadia Habbal, Pavel Štarha, Jana Hoderová, Judd Johnson,
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Miloslav Druckmüller
Institute of Mathematics, Faculty of Mechanical Engineering
Brno University of Technology, Czech Republic
druckmuller@fme.vutbr.cz
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Page last update: 26.11.2019
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