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subjected to an inward flowas the star's core may collapse into a neutron star or a black holethat is subsequently superseded by the violent outward flow of the supernova explosion.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:8/27/2014)... Many African-Americans may not be getting effective doses of ... Hopkins suggests. The initial dosing studies, completed before the ... generally lack a protein that is key to removing ... people with maximum levels of the protein including ... maraviroc in their bodies compared to those who lack ...
(Date:8/27/2014)... it is related to ability that we already possess. ... melody more easily than learning how to hit a ... the Neural Basis of Cognition (CNBC)a joint program between ... a fundamental constraint in the brain that may explain ... the Aug. 28, 2014, issue of Nature , ...
(Date:8/27/2014)... invasive grass species frequently found in forests has created ... on American toads, a new University of Georgia study ... to the U.S. in the early 1900s, is one ... to more than a dozen states in the past ... and in forests, it can survive in widely diverse ...
Breaking Biology News(10 mins):Dosage of HIV drug may be ineffective for half of African-Americans 2Pitt and Carnegie Mellon engineers discover why learning can be difficult 2Pitt and Carnegie Mellon engineers discover why learning can be difficult 3More wolf spiders feasting on American toads due to invasive grass, UGA study shows 2More wolf spiders feasting on American toads due to invasive grass, UGA study shows 3
... the Medical College of Wisconsin, the Children,s Research Institute, ... rapid, automated system to differentiate strains of influenza. ... a rapid automated influenza A, influenza B, and RSV ... the 2009 H1N1 swine-origin influenza virus (S-OIV) epidemic in ...
... past decade, researchers have developed a variety of reliable real-time ... marine mammals and fish. These new sensors are now being ... with some very important practical results. Among them is improved ... to reduce ship strikes, a leading cause of their deaths. ...
... There is increased evidence that the Arctic could face ... Scientists documented evidence that the Arctic Ocean and Nordic ... the mid-Pliocene warm period (3.3 to 3 million years ago). ... projected for the end of this century, and is used ...
Cached Biology News:Researchers use new acoustic tools to study marine mammals and fish 2Arctic could face warmer and ice-free conditions 2
(Date:8/27/2014)... Salt Lake City, Utah (PRWEB) August 27, 2014 ... new construction that will expand its current Salt Lake ... operations currently underway outside of Utah to ultimately create ... the next 20 years. , “Utah is home ... many of whom can be credited with Varian’s success ...
(Date:8/27/2014)... 2014 In 2013, Lawrence ... Livermore National Security LLC (LLNS), was awarded ... a state-of-the-art laser system for the European Union's ... construction in the Czech Republic. , When commissioned ... called the " High repetition-rate Advanced Petawatt Laser ...
(Date:8/27/2014)... One of nature,s mysteries is how plants survive ... in the sun,s rays, while using this energy ... proteins in the plant,s blades quickly dissipate the ... protein quakes. Researchers at DTU Physics have now ... plants, algae and bacteria contain light-absorbing proteins which ...
(Date:8/27/2014)... DUBLIN , Aug. 27, 2014 ... of the "Global Lactic Acid  (Biodegradable Polymer, ... - Trends & Forecasts to 2019" report ... the simplest hydroxyl-carboxylic acid with an asymmetrical carbon ... in the biodegradable polymer, food and beverage, personal ...
Breaking Biology Technology:Varian Medical Systems Groundbreaking on Facility Expansion Triggers Influx of New Jobs to Salt Lake 2Varian Medical Systems Groundbreaking on Facility Expansion Triggers Influx of New Jobs to Salt Lake 3LLNL Synchs up with ELI Beamlines on Timing System 2LLNL Synchs up with ELI Beamlines on Timing System 3DTU researchers film protein quake for the first time 2Global Lactic Acid (Biodegradable Polymer, Food & Beverage, Personal Care & Pharmaceutical) Market - Trends & Forecasts to 2019 2
... strikes in London five years ago - the 7/7 transit ... for the Study of Terrorism and Responses to Terrorism (START), ... the rise in the number of new terror groups and ... are usually far more lethal. The report is based on ...
... school in Grenoble, France, and Virginia Tech is using ... students, work will help gene synthesis companies and their ... as harmful agents for bioterrorism. Synthetic biology offers ... agriculture, and other areas. For a few thousand dollars, ...
... University of Hawaii at Manoa,s School of Ocean Earth ... of Sea Disposal Site Hawaii Number 5 (HI-05), a ... approximately 5 miles south of Pearl Harbor, Oahu, Hawaii. ... sidescan sonar and remotely operated underwater vehicles to locate ...
Cached Biology Technology:Rise in new terror groups globally, fewer coordinated attacks, report finds 2iGEM team helps prevent rogue use of synthetic biology 2University of Hawaii completes 3-year investigation of military munitions sea disposal site 2University of Hawaii completes 3-year investigation of military munitions sea disposal site 3
NM522 contains an F episome, which is required for production of ssDNA and for blue/white color selection. To maintain the F, NM522 should be grown on minimal (M-9) medium....
... Zero Blunt TOPO PCR ... is designed for cloning ... blunt-end PCR products. The ... TOPO Cloning and greater ...
... ULTROSPEC 6300 (YELLOW), 1 EA. ... the demanding requirements of the Pharmacopoeia in ... with the benefits of being able to ... of 1.0 nm and excellent scanning capability., ...
Recombinant Human CCL21/6Ckine (Mucin Stalk Chimera)...
Biology Products: