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subjected to an inward flowas the star's core may collapse into a neutron star or a black holethat is subsequently superseded by the violent outward flow of the supernova explosion.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:4/24/2017)... 24, 2017 Janice Kephart , ... Identity Strategy Partners, LLP (IdSP) , today issues ... President Trump,s March 6, 2017 Executive Order: ... vetting can be instilled with greater confidence, enabling ... all refugee applications are suspended by until at ...
(Date:4/13/2017)... April 13, 2017 UBM,s Advanced Design and ... will feature emerging and evolving technology through its 3D ... will run alongside the expo portion of the event ... and demonstrations focused on trending topics within 3D printing ... and manufacturing event will take place June 13-15, 2017 at ...
(Date:4/11/2017)... 2017 No two people are believed ... New York University Tandon School of Engineering and ... that partial similarities between prints are common enough ... phones and other electronic devices can be more ... lies in the fact that fingerprint-based authentication systems ...
Breaking Biology News(10 mins):
(Date:5/23/2017)... ... May 23, 2017 , ... Customers often prefer ... again and again. METTLER TOLEDO has released two new videos that show how ... integration of the ACT350 into Siemens and Allen Bradley PLCs is easy and ...
(Date:5/21/2017)... ... May 19, 2017 , ... Ovation Fertility scientists’ ... American Association of Bioanalysts (AAB) and the College of Reproductive Biology (CRB) today ... AAB’s commitment to excellence in clinical laboratory services and regulations. , “We ...
(Date:5/18/2017)... ... May 18, 2017 , ... Dr. Ralph ... at the Prince Of Wales Private Hospital. The procedure was performed on a ... patient failed conservative treatments prior to undergoing surgery. , The AxioMed viscoelastic disc ...
(Date:5/18/2017)... ... May 17, 2017 , ... ... stress expertise, and further enhances its scientific power by providing investigators access ... Ph.D., has agreed to join the scientific advisory board. “We are committed ...
Breaking Biology Technology: