Coronal holes appear as dark patches on the Sun, primarily in extreme ultraviolet and soft X-ray images due to the lower plasma density and electron temperature compared to the surrounding quiet Sun. Coronal holes form over open magnetic flux regions where one end of the magnetic field lines is attached to the Sun and the other end is dragged outward into interplanetary space by the solar wind.
The solar wind which is magnetized plasma of ions and electrons can flow out along these open field lines at very high speeds. Coronal holes occur usually at the solar poles (poloidal magnetic field), but during more active periods these dark holes can exist at all heliolatitudes and can trigger geomagnetic storms.
Know more:
https://www.cfa.harvard.edu/~scranmer/Preprints/eaaa_holes.pdf
https://www.cfa.harvard.edu/~scranmer/ITC/eaaa_solar_wind_schwenn.pdf
Image via Solar Dynamics Observatory/NASA
#coronalholes #nasa #SDO #space #sun
Coronal holes or Alien Megastructures?
ReplyDeleteIt's when the Sun has a phone call from other stars, the holes are where magnetic field lines link to other stars or galactic central:)
ReplyDeleteBoris Borcic You might be on to something. Energy/evolutionary management via stars entangled within the cosmos of a galactic brain.
ReplyDeleteEvo Lumin You are punishing physicists for talking firewalls and black hole entanglement:) Entangled stars, now. Very poetic.
ReplyDeleteStars as galactic neurons, what would be the time-scale division factor between such a galactic brain and our own? Does the speed of light really permit to think of the galaxy as (potentially) a scaled-up brain having stars for neurons?
The underlying fabric (quantum foam) is consciousness, thus allowing for instant cosmic-brain entanglement throughout the cosmos. Lolz
ReplyDelete