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Coronal Rain

April 29, 2010

httpv://www.youtube.com/watch?v=M4kT0xoCiPg The data from Solar Dynamics Observatory just keeps us amazing. SDO started taking data just few weeks back and it has already sent us so much of information and data about Sun’s temperature, magnetic fields, activities on sun such as solar prominence and now comes images  about coronal rain. The video here shows the event from April 19th, where after solar prominence event which led to release of billions of tons of material into the space, some of the pieces of plasma falls back into the sun. The phenomenon also called as coronal rain happens because of the sun’s immense gravitational force which pulls back some of the exploded plasma material back. While the phneonmenon is interesting to watch, it was not understood untill now as to why coronal rain falls back so slowly even in the presence of such immense gravitaional pull. SDO is now able to provide answer to this by measuring the temperature using Atmoshperic Imaging Assembly instrument (AIA) and it found out that the plasma debri or coronal rain is relatively very cool (60,000K) and it is cushioned by much hotter gases on the sun’s surface (1,000,000-2,000,000 K) causing the fallback to slowdown. You can see in this snapshot taken from the video the bright splashes when the coronal rain falls on the surface due to interaction between highly energetic particles in the plasma and the sun’s surface.

Source: Science@NASA And Solar Dynamic Observatory

Filed under: Research,Science

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2 Comments Leave a Comment

  • 1. Neha  |  April 29, 2010 at 12:47 pm

    Video is not working on my computer !

  • 2. pdiwakar  |  May 3, 2010 at 6:18 pm

    It’s linked to YouTube, so it should be working. Try opening again.

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