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Solar Magnetograms at 12 μm Using the Celeste Spectrograph
| Content Provider | Semantic Scholar |
|---|---|
| Author | Moran, Thomas G. Jennings, Donald E. Drake, L. McCabe, George H. Sada, Pedro V. Boyle, Robert J. |
| Copyright Year | 2007 |
| Abstract | Abstract We present the first solar vector magnetogram constructed from measurements of infra-red Mg I 12.32-μm line spectra. Observations were made at the McMath-Pierce Telescope using the Celeste spectrometer/polarimeter. Zeeman-split Stokes line spectra were fitted with Seares profiles to obtain the magnetic field parameters. Maps of absolute field strength, line-of-sight angle, and azimuth are presented. Analysis shows that the variation in field strength within a spatial resolution element, 2 arcseconds, is greatest in the sunspot penumbra and that this is most likely caused by vertical field strength gradients, rather than horizontal image smearing. Widths of the Zeeman-split σ components, assuming a formation layer thickness of 200 km, indicate that vertical field strength gradients can be as large as 6.5 G/km in a penumbra. |
| Starting Page | 213 |
| Ending Page | 222 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/s11207-007-0271-1 |
| Alternate Webpage(s) | http://www.dickinson.edu/download/downloads/id/40/solarmagnetograms |
| Alternate Webpage(s) | https://doi.org/10.1007/s11207-007-0271-1 |
| Volume Number | 241 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
