Coronal magnetography of solar active region 8365 with the SSRT and NoRH radio heliographs
| dc.contributor.author | Ryabov, B. I. | en |
| dc.contributor.author | Maksimov, V. P. | en |
| dc.contributor.author | Lesovoi, S. V. | en |
| dc.contributor.author | Shibasaki, K. | en |
| dc.contributor.author | Nindos, A. | en |
| dc.contributor.author | Pevtsov, A. | en |
| dc.date.accessioned | 2015-11-24T18:31:18Z | |
| dc.date.available | 2015-11-24T18:31:18Z | |
| dc.identifier.issn | 0038-0938 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/16442 | |
| dc.rights | Default Licence | - |
| dc.subject | magnetic-fields | en |
| dc.subject | microwave emission | en |
| dc.subject | active-region | en |
| dc.subject | polarization | en |
| dc.subject | inversion | en |
| dc.subject | sunspot | en |
| dc.title | Coronal magnetography of solar active region 8365 with the SSRT and NoRH radio heliographs | en |
| heal.abstract | Microwave maps of solar active region NOAA 8365 are used to derive the coronal magnetograms of this region. The technique is based on the fact that the circular polarization of a radio source is modified when microwaves pass through the coronal magnetic field transverse to the line of sight. The observations were taken with the Siberian Solar Radio Telescope (SSRT) on October 21 - 23 and with the Nobeyama Radio Heliograph (NoRH) on October 22 - 24, 1998. The known theory of wave mode coupling in quasi-transverse (QT) region is employed to evaluate the coronal magnetograms in the range of 10 - 30 G at the wavelength 5.2 cm and 50 - 110 G at 1.76 cm, taking the product of electron density and the scale of coronal field divergence to be constant of 10(18) cm(-2). The height of the QT-region is estimated from the force-free field extrapolations as 6.2 x 10(9) cm for the 20 G and 2.3 x 10(9) cm for 85 G levels. We find that on large spatial scale, the coronal magnetograms derived from the radio observations show similarity with the magnetic fields extrapolated from the photosphere. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | DOI 10.1007/s11207-005-2691-0 | - |
| heal.identifier.secondary | <Go to ISI>://000229188200003 | - |
| heal.identifier.secondary | http://www.springerlink.com/content/h5q317q41270r431/fulltext.pdf | - |
| heal.journalName | Solar Physics | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2005 | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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