ICEINSPACE
Most Read Articles
Moon Phase
CURRENT MOON Waxing Crescent
20.7%
The Sun Now
Time Zones
Sydney*
3:15 pm
Perth
12:15 pm
Auckland*
5:15 pm
New York
11:15 pm
Paris
5:15 am
GMT
4:15 am




Go Back   IceInSpace > General Astronomy > Astronomy and Amateur Science

Reply
 
Thread Tools Rate Thread
  #1  
Old 28-12-2017, 11:47 AM
gary
Registered User

gary is offline
 
Join Date: Apr 2005
Location: Mt. Kuring-Gai
Posts: 4,884
Question Did the Solar System form in a Wolf-Rayet star bubble? - University of Chicago study

A 22 Dec 2017 paper appears in the Astrophysical Journey which puts
forward the theory that the Solar System was formed within the bubble
of a Wolf-Rayet star rather than having been created in a supernova.

The University of Chicago have made a press release.

Quote:
Originally Posted by University of Chicago
This setup differs from the supernova hypothesis in order to make sense of two isotopes that occur in strange proportions in the early solar system, compared to the rest of the galaxy. Meteorites left over from the early solar system tell us there was a lot of aluminium-26. In addition, studies, including a 2015 one by Dauphas and a former student, increasingly suggest we had less of the isotope iron-60.

This brings scientists up short, because supernovae produce both isotopes. “It begs the question of why one was injected into the solar system and the other was not,” said coauthor Vikram Dwarkadas, a research associate professor in Astronomy and Astrophysics.

This brought them to Wolf-Rayet stars, which release lots of aluminium-26, but no iron-60.

“The idea is that aluminum-26 flung from the Wolf-Rayet star is carried outwards on grains of dust formed around the star. These grains have enough momentum to punch through one side of the shell, where they are mostly destroyed—trapping the aluminum inside the shell,” Dwarkadas said. Eventually, part of the shell collapses inward due to gravity, forming our solar system.
Press release here :-
https://news.uchicago.edu/article/20...und-giant-star

"Triggered Star Formation inside the Shell of a Wolf–Rayet Bubble as the Origin of the Solar System" by Dwarkadas et. al. here (requires subscription) :-
http://iopscience.iop.org/article/10...38-4357/aa992e
Reply With Quote
  #2  
Old 28-12-2017, 01:10 PM
astroron's Avatar
astroron (Ron)
Supernova Searcher

astroron is offline
 
Join Date: Mar 2005
Location: Cambroon Queensland Australia
Posts: 8,739
Thanks Gary,that's very interesting
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 02:15 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Advertisement
Atik Horizon
Advertisement
SkyWatcher WiFi Adaptor
Advertisement
Interest Free Finance
Advertisement
SkyWatcher 2018 Catalogue
Advertisement
Bintel
Advertisement
OzScopes Authorised Dealer
Advertisement
FLI Cameras and Imaging Accessories
Advertisement
NexDome Observatories
Advertisement
Lunatico Astronomical
Advertisement
Astronomy and Electronics Centre
Advertisement