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| <color red > New: </color> ** [[observation:2025campaign#2025 campaign schedule | Preliminary schedule of 2025 observing campaign]] ** \\ | <color red > New: </color> ** [[observation:2025campaign#2025 campaign schedule | Schedule of 2025 observing campaign]] ** \\ |
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| **[[science| Scientific research with THEMIS]]** \\ | **[[science| Scientific research with THEMIS]]** \\ |
| [[science:results| THEMIS scientific highlights and news]] \\ | [[science:results| THEMIS scientific highlights and news]] \\ |
| [[science:results:gallery| THEMIS observations and media galleries]] | [[science:gallery| THEMIS observations and media galleries]] |
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| == THEMIS image of the month: March 2025 == | == THEMIS image of the month: May 2025 == |
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| <html> <a href="https://www.themis.iac.es/lib/exe/fetch.php?media=results:gallery:ar:activeregionbestof_6x2.jpg"> <img src="https://www.themis.iac.es/lib/exe/fetch.php?media=results:gallery:ar:activeregionbestof_6x2.jpg" alt="2022-2025 THEMIS sunspot best-of" style="width: 100%; height: auto;"></a></html> | <html> <a href="https://www.themis.iac.es/lib/exe/fetch.php?media=science:gallery:mercury:mercury_mangano2013.jpg"> <img src="https://www.themis.iac.es/lib/exe/fetch.php?media=science:gallery:mercury:mercury_mangano2013.jpg" alt="Hourly dynamics of Sodium emission on Mercury" style="width: 100%; height: auto;"></a></html> |
| \\ | **May was Mercury Month a theMis!**\\ |
| A selection of THEMIS sunspot observations obtained between 2022 and 2025 with the [[technical:description#broadband_imaging_bbi_filter_camera | BroadBand Imaging Camera]]. Observations are performed using [[technical:tao|Themis Adaptive Optics]] and images are processed with a Knox-Thompson image-reconstruction method. </columns> | This past month of May took place the usual annual observation campaign of Mercury, led by researchers from the Italian National Institute of Astrophysics (INAF/IAPS in Rome) in collaboration with scientist from the French Laboratoire Atmosphères, Observations Spatiales (LATMOS/CNRS-UVSQ-SU-CNES in Paris). \\ |
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| [[results:gallery:imofmonth|Past images of the month]] | In a sequence of scans of the exosphere of Mercury obtained some years ago, THEMIS could follow the hourly evolution of the reconstructed distribution of the Sodium emission. The figure displays the intensity emission (in kiloRayleigh) after preliminary reduction, including bias and sky background subtraction, as well as spectral and flux calibrations. Solid white line highlights the disk of the planet, the cross indicating the center of the disk. Mercury disk is 6.0'' wide. The Sun is located on the left. \\ |
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| | The images show the two peaks of higher intensity at high hermian latitude in the direction of the Sun. These peaks of sodium emission are roughly co-spatial with the positions of the magnetic footprints. Their evolution is due to the link of such emission with the Mercury magnetosphere and the interaction with the varying solar wind particles penetrating the magnetosphere and flowing to the surface. |
| | Adapted from [[https://doi.org/10.1016/j.pss.2013.03.002]| Mangano et al. 2013]]. \\ |
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| | [[science:imofmonth|Past images of the month]] |
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