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Is Betelgeuse shedding a planetary nebula?

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#1 Gvs


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Posted 14 February 2020 - 03:24 PM

After reading about 1987A event.  It was clear that that star underwent a shedding event 20000 year ago.


Is it possible that what we are currently witnessing something similar with Betelgeuse?


Credence to this, are observations done during December last year. 


Detail study of red giants within M62, Hyades or Coma clusters, can most likely provide additional information (or other open clusters), as they should have red giants within them, which must be further along in this phase of their stellar evolution.


Further more, given that most planetary nebula don't always look the same, it would be wise to see the correlation between mass, intrinsic brightness of a SN event and the stellar remnant, in order to validate our current theories on these events are yard sticks in cosmology. 

Edited by Gvs, 14 February 2020 - 03:30 PM.

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#2 photoracer18



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Posted 14 February 2020 - 04:00 PM

SN1987A progenitor was a B3 blue super-giant, Betelgeuse is an M1/2 red super-giant. The internal thermonuclear processes are different. Planetary nebula are most likely to be shed by massive hot stars (O-A-B and WR stars) not massive cool stars. Not counting binary systems. While Betelgeuse is showing a lot of odd "surface" features its solar wind produces a lot of dust because the outer layer is so far from the fusion region in the interior that the external temperature of its extended atmosphere is relatively low. If we believe some of the observations from the pre-telescope era Betelgeuse passed from the yellow super-giant phase to the red super-giant phase within recorded history. That puts it still a long time from the possible supernova era. They still don't know what star-forming region it may have been ejected from. Its motion does not directly point to any of the groups near it in Orion unless its motion was changed by another event. A lot of speculation at this point. That is normally what you get. Before SN1987A they did not think a blue super-giant could produce a Type II supernova either.

Edited by photoracer18, 14 February 2020 - 04:01 PM.

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#3 descott12


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Posted 14 February 2020 - 04:41 PM

I believe that planetary nebula are the end point of stars closer to a solar mass (+/- a few ) after they pass through the red giant phase and are heading toward a white dwarf.

Betelgeuse is a red supergiant and should end as a supernova although I was reading that it has blown off so much material already that it may fall below the minimum mass to go supernova.

#4 Redbetter



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Posted 14 February 2020 - 05:13 PM

Unlikely, since supernovae don't leave behind planetary nebulae.  Betelgeuse is likely to end up as a Type II supernova because it is a very massive red supergiant.  A neutron star or black hole will be left behind (I believe neutron star is most likely based on Betelgeuse' estimated mass.)  Planetary nebula arise from less massive progenitors (0.8 to 8 solar masses) that proceed through the asymptotic giant branch.  They have high mass loss during the AGB phase, and in the final stages the planetary nebula detaches and the star becomes a white dwarf.  That is my understanding anyway.

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