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subjected to an inward flowas the star's core may collapse into a neutron star or a black holethat is subsequently superseded by the violent outward flow of the supernova explosion.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:6/22/2016)... , June 22, 2016   Acuant ... and verification solutions, has partnered with RightCrowd ... solutions for Visitor Management, Self-Service Kiosks and ... products that add functional enhancements to existing ... corporations and venues with an automated ID ...
(Date:6/15/2016)... June 15, 2016 Transparency ... titled "Gesture Recognition Market by Application Market - Global Industry Analysis ... 2024". According to the report, the  global gesture recognition ... 2015 and is estimated to grow at a ... by 2024.  Increasing application of gesture ...
(Date:6/2/2016)... , June 2, 2016 The ... has awarded the 44 million US Dollar project, for ... Embossed Vehicle Plates including Personalization, Enrolment, and IT Infrastructure ... leader in the production and implementation of Identity Management Solutions. ... January, however Decatur was selected for ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... ... 2016 , ... Parallel 6 , the leading software as a service ... Virtual Patient Encounter CONSULT module which enables both audio and video telemedicine communication ... , Using the CONSULT module, patients and physicians can schedule a face to face ...
(Date:6/27/2016)... , ... June 27, 2016 , ... ... for Amgen, will join the faculty of the University of North Carolina ... professor of strategy and entrepreneurship at UNC Kenan-Flagler, with a focus on the ...
(Date:6/27/2016)... June 27, 2016   Ginkgo Bioworks , a ... engineering, was today awarded as one of the ... the world,s most innovative companies. Ginkgo Bioworks is ... the real world in the nutrition, health and ... directly with customers including Fortune 500 companies to ...
(Date:6/24/2016)... SAN DIEGO , June 24, 2016 /PRNewswire/ ... that more sensitively detects cancers susceptible to PARP ... individual circulating tumor cells (CTCs). The new test ... of HRD-targeted therapeutics in multiple cancer types. ... therapies targeting DNA damage response pathways, including PARP, ...
Breaking Biology Technology: