{"id":72072,"date":"2020-09-21T18:55:12","date_gmt":"2020-09-21T15:55:12","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/shining-light-on-heating-the-solar-corona\/"},"modified":"2020-09-21T18:55:12","modified_gmt":"2020-09-21T15:55:12","slug":"shining-light-on-heating-the-solar-corona","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/shining-light-on-heating-the-solar-corona\/","title":{"rendered":"#Shining light on heating the solar corona"},"content":{"rendered":"

“#Shining light on heating the solar corona<\/strong>”<\/p>\n

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\n X-rays stream off the sun in this image showing observations from by NASA’s Nuclear Spectroscopic Telescope Array, or NuSTAR, overlaid on a picture taken by NASA’s Solar Dynamics Observatory (SDO).\u00a0Credit: NASA
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In a paper published today in Nature Astronomy<\/i>, researchers report the first ever clear images of nanojets\u2014bright thin lights that travel<\/a> perpendicular to the magnetic structures in the solar atmosphere, called the corona\u2014in a process that reveals the existence of one of the potential coronal heating candidates: nanoflares.<\/p>\n


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In pursuit of understanding why the Sun’s atmosphere is so much hotter than the surface, and to help differentiate between a host of theories about what causes this heating, researchers turn to NASA’s Interface Region Imaging Spectrograph (IRIS) mission. IRIS was finely tuned with a high-resolution imager to zoom in on specific hard-to-see events on the Sun.<\/p>\n

Nanoflares are small explosions on the Sun\u2014but they are difficult to spot. They are very fast and tiny, meaning they are hard to pick out against the bright surface of the Sun. On April 3, 2014, during what’s known as a coronal rain event when streams of cooled plasma fall from the corona to the Sun’s surface looking almost like an enormous waterfall, researchers noticed bright jets app<\/a>earing near the end of the event. These telltale flashes are nanojets\u2014heated plasma traveling so fast that they appear on images as bright thin lines seen within the magnetic loops on the Sun. Nanojets are considered a “smoking gun,” key evidence of the presence of nanoflares. Each nanojet is believed to be initiated by a process known as magnetic reconnection where twisted magnetic fields explosively realign. One reconnection can set off another reconnection, creating an avalanche of nanojets in the corona of the Sun, a process that could create the energy that is heating the corona. In the visualization above, the Solar Dynamic Observatory gives us a full view of the Sun before zooming into IRIS’s up close view of the nanojets, which briefly light up in the magnetic loops.<\/p>\n


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