Navigation Links
Stability lost as supernovae explode
Date:5/15/2014

Exploding supernovae are a phenomenon that is still not fully understood. The trouble is that the state of nuclear matter in stars cannot be reproduced on Earth. In a recent paper published in EPJ E, Yves Pomeau from the University of Arizona, USA, and his French colleagues from the CNRS provide a new model of supernovae represented as dynamical systems subject to a loss of stability, just before they explode. Because similar stability losses also occur in dynamical systems in nature, this model could be used to predict natural catastrophes before they happen. Previous studies of the creeping of soft solids, earthquakes, and sleep-wake transitions have already confirmed the validity of this approach.

The authors show that the stars' loss of stability can be described in mathematical terms as a so-called dynamical saddle-node bifurcation. This approach makes it possible to devise a universal equation describing supernovae dynamics at its onset, taking into account the initial physical conditions of stability. Unlike previous studies, this one sheds light on why the time scale of a supernova explosionlasting between ten and thirty secondsis considerably shorter than the overall pace of evolution of the star, in the billion year range.

This study also attempts to elucidate whether supernova explosions are genuine and do not result from a reversed implosion. Indeed, supernovae are believed to be initially subjected to an inward flowas the star's core may collapse into a neutron star or a black holethat is subsequently superseded by the violent outward flow of the supernova explosion. The authors attempt to explain this phenomenon through a detailed model, demonstrating that the star enters a global free fall following its loss of stability.


'/>"/>

Contact: Saskia Rohmer
saskia.rohmer@springer.com
49-622-148-78414
Springer
Source:Eurekalert

Page: 1

Related biology news :

1. Lightweight construction materials of highest stability thanks to their microarchitecture
2. Now Available -- Genome Stability: DNA Repair and Recombination by James E. Haber
3. Population stability hope in species response to climate change
4. Oregon scientists offer new insights on controlling nanoparticle stability
5. Clam fossils divulge secrets of ecologic stability
6. Mutation altering stability of surface molecule in acid enables H5N1 infection of mammals
7. Enzyme helps cancer cells avoid genetic instability
8. From the Amazon rainforest to human body cells: Quantifying stability
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/14/2017)... , June 15, 2017  IBM (NYSE: IBM ) ... international tech event dedicated to developing collaboration between startups and ... on June 15-17. During the event, nine startups will showcase ... value in various industries. France ... the international market, with a 30 percent increase in the ...
(Date:5/23/2017)... , May 23, 2017  Hunova, the first robotic gym for the ... been officially launched in Genoa, Italy . The first ... and the USA . The technology was developed ... market by the IIT spin-off Movendo Technology thanks to a 10 million ... News Release, please click: ...
(Date:5/16/2017)... -- Veratad Technologies, LLC ( www.veratad.com ), an innovative and ... solutions, announced today they will participate as a sponsor ... May 17, 2017, in Washington D.C.,s ... Identity impacts the lives of billions of ... digital world, defining identity is critical to nearly every ...
Breaking Biology News(10 mins):
(Date:6/22/2017)... ... June 21, 2017 , ... ... top executive talent in the life sciences industry, today announces a strategic partnership ... The partnership takes full advantage of Beaker’s expertise in executive recruitment solutions, providing ...
(Date:6/22/2017)... (PRWEB) , ... June 21, 2017 , ... ... regional office in North Carolina, and engages Timothy Reinhardt to manage the new ... quality leadership at Pfizer Inc, with his most recent role as the Director ...
(Date:6/22/2017)... ... June 21, 2017 , ... Building on the success of the inaugural ... on the very latest developments in radical life extension. RAADfest combines cutting edge science ... the empowerment of personal development, making it the largest most comprehensive and inclusive super ...
(Date:6/22/2017)... Germany (PRWEB) , ... June 22, 2017 , ... ... is taking over the allergy specialists DST Diagnostische Systeme & Technologien GmbH, thereby ... all know someone who suffers from hay fever, urticaria, asthma, atopic eczema or ...
Breaking Biology Technology: