Go Back   IceInSpace > General Astronomy > Astronomy and Amateur Science

Reply
 
Thread Tools Rate Thread
  #1  
Old 30-06-2020, 10:39 AM
gary
Registered User

gary is offline
 
Join Date: Apr 2005
Location: Mt. Kuring-Gai
Posts: 5,520
Betelgeuse dimming most likely caused by giant star spots - new study

29th June 2020

Quote:
Originally Posted by Max Planck Institute for Astronomy
Betelgeuse, the bright star in the constellation of Orion, has been fascinating astronomers in the recent months because of its unusually strong decline in brightness. Scientists have been discussing a number of scenarios trying to explain its behaviour. Now a team led by Thavisha Dharmawardena of the Max Planck Institute for Astronomy have shown that most likely unusually large star spots on the surface of Betelgeuse have caused the dimming. Their results rule out the previous conjecture that it was dust, recently ejected by Betelgeuse, which obscured the star. The results are published today in the journal The Astrophysical Journal Letters.
Full press release here, with images :-
https://www.mpia.de/news/science/2020-08-betelgeuse

Paper at arXiv, "Betelgeuse fainter in the sub-millimetre too:
an analysis of JCMT and APEX monitoring during the recent optical minimum" by Dharmawardena et. al :-
https://arxiv.org/pdf/2006.09409.pdf
Reply With Quote
  #2  
Old 30-06-2020, 12:26 PM
Saturnine (Jeff)
Registered User

Saturnine is offline
 
Join Date: Jul 2008
Location: Wollongong
Posts: 1,453
Interesting article, helps explain the dip in brightness, probably. Thanks for the link.
Reply With Quote
  #3  
Old 30-06-2020, 01:16 PM
foc (Ross)
Registered User

foc is offline
 
Join Date: Apr 2017
Location: ACT
Posts: 164
Thanks for the info. Wonder if this report of Betelgeuse spots will go viral! Last Summer was a bit of a dud here, hope this year we get lots of smoke free opportunities to enjoy Betelgeuse and Orion.
Reply With Quote
  #4  
Old 30-06-2020, 02:21 PM
glend (Glen)
Registered User

glend is offline
 
Join Date: Jun 2013
Location: Lake Macquarie
Posts: 6,028
I prefer the Dyson Sphere Theory, more exciting, and we will never know for sure either way.
Reply With Quote
  #5  
Old 17-08-2020, 11:36 AM
billdan's Avatar
billdan (Bill)
Registered User

billdan is offline
 
Join Date: Mar 2012
Location: Narangba, SE QLD
Posts: 1,485
This article from ABC news explains what scientists believe is causing Betelgeuse to dim (dust clouds).


https://www.abc.net.au/news/2020-08-...ained/12563330
Reply With Quote
  #6  
Old 17-08-2020, 12:11 PM
Max Vondel's Avatar
Max Vondel (Peter)
Time Traveller

Max Vondel is offline
 
Join Date: Aug 2008
Location: Sydney, Australia
Posts: 311
Brewing up and out the Carbon of life
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 04:02 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement
Limpet Controller
Advertisement
NexDome Observatories
Advertisement
Testar
Advertisement
Astronomy and Electronics Centre
Advertisement