#11
|
|||
|
|||
Betelgeuse
On Aug/26/2020 at 15:18, David Spain wrote :
On 8/15/2020 7:57 PM, Alain Fournier wrote: On Apr/24/2020 at 09:19, David Spain wrote : On 2020-04-23 7:22 PM, Alain Fournier wrote: Betelgeuse luminosity is now reaching what it was at its most recent luminosity high (March 2019) and the curve is not showing any sign of slowing down. Still too early to be excited, but I think it is worthwhile to monitor its luminosity. Alain Fournier Natch it is now passing into our daylight sky as summer approaches. If goes supernova we might see a bright spot in the daytime sky this summer. If it persists into next winter, THAT would be spectacular. Let's hope if it is heading this way it holds off for a few months! Personally I hope not. I like it they way it is.... Dave It has now crossed the sun and has survived :-) Its luminosity is on its way down. It should be continuing to dim for several more months (but who knows, it isn't really following the script any more) but it has already reached its dimmest value of the 20 years prior to November 2019 (V-magnitude over 1), though still very far from the 1.8 magnitude of earlier this year. It is hard to tell from the few data points available, but its current dimming cycle seems to be even more pronounced than the previous one at the same point in the cycle. So it might dim to more than a 1.8 magnitude this time. Who knows? I still think it is about to go super nova. On an astronomical time scale, that is within the next 100,000 years or so. Alain Fournier So have you seen this article on the possibility it is dimming because of the ejection of large amount of material that has cooled and is in our line of sight? Dave Synopsis: https://www.nydailynews.com/news/nat...6hu-story.html Actual Paper: (paywalled) https://iopscience.iop.org/article/1...38-4357/aba516 Yes I had read that. And when I read it, I thought it was a good explanation for the dimming. But If the dimming happens again this year, then an explanation needs to be found as for why all of a sudden Betelgeuse has started to eject large amounts of material. Note also that "large" amounts of material here means really very large amounts. The size of Betelgeuse means that a mere billion tonnes of material would be insufficient by several orders of magnitude. Alain Fournier |
#12
|
|||
|
|||
Betelgeuse
"Alain Fournier" wrote in message ...
On Aug/26/2020 at 15:18, David Spain wrote : On 8/15/2020 7:57 PM, Alain Fournier wrote: On Apr/24/2020 at 09:19, David Spain wrote : On 2020-04-23 7:22 PM, Alain Fournier wrote: Betelgeuse luminosity is now reaching what it was at its most recent luminosity high (March 2019) and the curve is not showing any sign of slowing down. Still too early to be excited, but I think it is worthwhile to monitor its luminosity. Alain Fournier Natch it is now passing into our daylight sky as summer approaches. If goes supernova we might see a bright spot in the daytime sky this summer. If it persists into next winter, THAT would be spectacular. Let's hope if it is heading this way it holds off for a few months! Personally I hope not. I like it they way it is.... Dave It has now crossed the sun and has survived :-) Its luminosity is on its way down. It should be continuing to dim for several more months (but who knows, it isn't really following the script any more) but it has already reached its dimmest value of the 20 years prior to November 2019 (V-magnitude over 1), though still very far from the 1.8 magnitude of earlier this year. It is hard to tell from the few data points available, but its current dimming cycle seems to be even more pronounced than the previous one at the same point in the cycle. So it might dim to more than a 1.8 magnitude this time. Who knows? I still think it is about to go super nova. On an astronomical time scale, that is within the next 100,000 years or so. Alain Fournier So have you seen this article on the possibility it is dimming because of the ejection of large amount of material that has cooled and is in our line of sight? Dave Synopsis: https://www.nydailynews.com/news/nat...6hu-story.html Actual Paper: (paywalled) https://iopscience.iop.org/article/1...38-4357/aba516 Yes I had read that. And when I read it, I thought it was a good explanation for the dimming. But If the dimming happens again this year, then an explanation needs to be found as for why all of a sudden Betelgeuse has started to eject large amounts of material. Note also that "large" amounts of material here means really very large amounts. The size of Betelgeuse means that a mere billion tonnes of material would be insufficient by several orders of magnitude. Yeah, the scale of this would be... incredible. It's times like this I really wish we had something like the USS Enterprise." "Hey Spock, want to go see a star spin off a mass the size of Earth's Moon?" "That would be fascinating Captain." "Sulu, Warp factor 6" Alain Fournier -- Greg D. Moore http://greenmountainsoftware.wordpress.com/ CEO QuiCR: Quick, Crowdsourced Responses. http://www.quicr.net IT Disaster Response - https://www.amazon.com/Disaster-Resp...dp/1484221834/ |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Betelgeuse Going Nova | kT | Space Station | 4 | June 18th 09 04:39 AM |
Brightness of Betelgeuse | Robert Lunsford | Amateur Astronomy | 2 | October 28th 06 10:13 AM |
How far away - and how big - is Betelgeuse????????? | rick | Astronomy Misc | 2 | December 3rd 04 12:53 AM |
Betelgeuse | JOHN PAZMINO | Amateur Astronomy | 1 | November 22nd 04 01:41 PM |
Betelgeuse | tony hoffman | Amateur Astronomy | 14 | November 21st 04 08:44 PM |