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Cookie Monster

Betelgeuse about to go Nova?

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Cookie Monster

From October to April the red giant dimmed by 60% before brightening back up.

It led many to speculate the star is about to go supernova which was dismissed as being caused by a sunspot or space dust. But a new analysis of electro-magnetic radiation in the terahertz wavelength contradicts this. The reason being that while dust particles block visible wavelengths of light they dont block terahertz wavelengths.

It means the stars light output did dim by 60%.

Red Giants pulse. They fuse the next heaviest element, that produces heat and light, they expand because of it, then cool when done. That causes a contraction and dimming. As all the matter collapses back to the star the pressure (if great enough) starts the process of fusing the next heaviest element.

This continues until the star is mostly iron. When iron plasma cools and the star contracts the mass of the iron is sufficient enough to create anti-matter as its smashed together. That causes an anti-matter explosion which is the supernova. The huge drop in light output suggests the star is nearing fusing its heaviest element which at its size will be the iron.

Is it about to go kaboom? And how safe do people feel in scientists claims its too far away to impact the Earth? If it so much as adds 10C to regional temperatures it will result in global flooding, widespread wildfires, and mass extinction.

https://news.sky.com/story/betelgeuse-has-dimmed-60-ahead-of-potentially-imminent-supernova-12017859

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Piney
ChrLzs
29 minutes ago, Cookie Monster said:

From October to April the red giant dimmed by 60% before brightening back up.

It led many to speculate the star is about to go supernova which was dismissed as being caused by a sunspot or space dust. But a new analysis of electro-magnetic radiation in the terahertz wavelength contradicts this. The reason being that while dust particles block visible wavelengths of light they dont block terahertz wavelengths.

It means the stars light output did dim by 60%.

Well, yes, the light output we are seeing here did dim by 50-60%...  However, and I'm happy to be corrected here, but I don't believe that the methodology used to eliminate dust or other 'blocking' has been used before, and thus it is not verified.  It remains a theory...

29 minutes ago, Cookie Monster said:

Red Giants pulse. They fuse the next heaviest element, that produces heat and light, they expand because of it, then cool when done. That causes a contraction and dimming. As all the matter collapses back to the star the pressure (if great enough) starts the process of fusing the next heaviest element.

This continues until the star is mostly iron. When iron plasma cools and the star contracts the mass of the iron is sufficient enough to create anti-matter as its smashed together. That causes an anti-matter explosion which is the supernova. The huge drop in light output suggests the star is nearing fusing its heaviest element which at its size will be the iron.

Or it could be that large sunspots are normal for a star of that age and type.  We just don't know.

29 minutes ago, Cookie Monster said:

Is it about to go kaboom? And how safe do people feel in scientists claims its too far away to impact the Earth?

Pretty safe, given that the consensus of astronomers is that it is hundreds of times too far away and will likely have almost zero measurable effects and likely cause nothing other than being a very bright star... 

29 minutes ago, Cookie Monster said:

If it so much as adds 10C to regional temperatures it will result in global flooding, widespread wildfires, and mass extinction.

????  What is your source that suggests it might add 10C?  That isn't in your link, unless I missed it.....

 

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Waspie_Dwarf

We have already had several topics on this subject:

Is the star Betelgeuse about to go supernova?

Telescope Sees Surface of Dim Betelgeuse

Betelgeuse dimming probably caused by dust

Giant star spots cause of Betelgeuse dimming

To avoid further duplication I am going to close this topic.

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