Is Betelgeuse About to go Supernovae?
- shpalman
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Re: Is Betelgeuse About to go Supernovae?
having that swing is a necessary but not sufficient condition for it meaning a thing
@shpalman@mastodon.me.uk
@shpalman@mastodon.me.uk
Re: Is Betelgeuse About to go Supernovae?
don’t be so gloomy. here’s the content you need:
https://mobile.twitter.com/starstricken ... 3606515712
https://mobile.twitter.com/starstricken ... 3606515712
Re: Is Betelgeuse About to go Supernovae?
That's cool. Thanks for the link.plodder wrote: ↑Thu Feb 27, 2020 5:10 amdon’t be so gloomy. here’s the content you need:
https://mobile.twitter.com/starstricken ... 3606515712
- tenchboy
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Re: Is Betelgeuse About to go Supernovae?
The one a few below 'of the moon making an appearance on our satelite images of the sun' reminds me of...cvb wrote: ↑Thu Feb 27, 2020 8:31 amThat's cool. Thanks for the link.plodder wrote: ↑Thu Feb 27, 2020 5:10 amdon’t be so gloomy. here’s the content you need:
https://mobile.twitter.com/starstricken ... 3606515712
Spoiler:
If you want me Steve, just Snapchat me yeah? You know how to Snapchap me doncha Steve? You just...
Re: Is Betelgeuse About to go Supernovae?
Dust, apparently, and originating from the star itself. (Someone tell Philip Pullman.)
https://www.theguardian.com/science/202 ... betelgeuse
Is it normal for star to kick out enough dust to hide it from view?
https://www.theguardian.com/science/202 ... betelgeuse
Is it normal for star to kick out enough dust to hide it from view?
Re: Is Betelgeuse About to go Supernovae?
I didn't follow that twitter link till now and I wonder if I misconstrued its talking about convection cells and starspots: is it actually possible to resolve any features at all of an object (even Betelgeuse-sized) 200 parsecs away? That seems impossible but I do keep finding myself having to recalibrate my boundaries of the possible.
Re: Is Betelgeuse About to go Supernovae?
And remember that if you botch the exit, the carnival of reaction may be coming to a town near you.
Fintan O'Toole
Fintan O'Toole
Re: Is Betelgeuse About to go Supernovae?
Betelgeuse was resolved as a disc using optical interferometry as early as the 1930's I think.Martin Y wrote: ↑Sat Aug 15, 2020 12:49 pmI didn't follow that twitter link till now and I wonder if I misconstrued its talking about convection cells and starspots: is it actually possible to resolve any features at all of an object (even Betelgeuse-sized) 200 parsecs away? That seems impossible but I do keep finding myself having to recalibrate my boundaries of the possible.
ETA 1920 apparently
My avatar was a scientific result that was later found to be 'mistaken' - I rarely claim to be 100% correct
ETA 5/8/20: I've been advised that the result was correct, it was the initial interpretation that needed to be withdrawn
Meta? I'd say so!
ETA 5/8/20: I've been advised that the result was correct, it was the initial interpretation that needed to be withdrawn
Meta? I'd say so!
Re: Is Betelgeuse About to go Supernovae?
Thanks. <recalibrates>
Re: Is Betelgeuse About to go Supernovae?
Whole galaxies do it sometimes.AMS wrote: ↑Fri Aug 14, 2020 12:18 pmDust, apparently, and originating from the star itself. (Someone tell Philip Pullman.)
https://www.theguardian.com/science/202 ... betelgeuse
Is it normal for star to kick out enough dust to hide it from view?
Re: Is Betelgeuse About to go Supernovae?
Here's an image from December.Gfamily wrote: ↑Sat Aug 15, 2020 1:03 pmBetelgeuse was resolved as a disc using optical interferometry as early as the 1930's I think.Martin Y wrote: ↑Sat Aug 15, 2020 12:49 pmI didn't follow that twitter link till now and I wonder if I misconstrued its talking about convection cells and starspots: is it actually possible to resolve any features at all of an object (even Betelgeuse-sized) 200 parsecs away? That seems impossible but I do keep finding myself having to recalibrate my boundaries of the possible.
ETA 1920 apparently
Re: Is Betelgeuse About to go Supernovae?
Betelgeuse is 55 milli arcseconds in apparent diameter.
The EHT observations of M87 and SgrA* have an angular resolution of 25 micro arcseconds, so could theoretically put 2000 pixels across Betelgeuse.
Unfortunately stars are really boring to look at in the submm-wave continuum. We get far more information from spectral line observations that don't fully resolve the disk of the star.
The EHT observations of M87 and SgrA* have an angular resolution of 25 micro arcseconds, so could theoretically put 2000 pixels across Betelgeuse.
Unfortunately stars are really boring to look at in the submm-wave continuum. We get far more information from spectral line observations that don't fully resolve the disk of the star.
Re: Is Betelgeuse About to go Supernovae?
I caught myself thinking "I know it's enormously bigger than the sun but 55mas at 200 parsecs; that would make Betelgeuse several times bigger than the entire orbit of the earth and... Oh. Wait. It is." Got the nagging feeling this was all familiar when I was young and I've got stupid. Guess I just haven't thought about in ages.