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Primeur weekly 2018-09-10

Quantum computing

Quantum computing in any language ...

Defiance ETFs launches QTUM, the Quantum Computing ETF, offering investors exposure to leaders in the field ...

Light exchange - A quantum gate between atoms and photons may help in scaling up quantum computers ...

Focus on Europe

cOAlition S: making Open Access a reality by 2020 ...

National Centre for Supercomputing Applications in Sofia, Bulgaria hosts PRACE Winter School on Computational Chemistry, Biochemistry and Medicinal chemistry - Methods and Tools ...

Middleware

DataDirect Networks completes $60 million Tintri acquisition and enters enterprise virtualization market ...

Bright Computing announces partnership with Japanese firm Towa Electric ...

Introduction of Altair Inspire and Altair 365 poised to transform product development ...

Hardware

DDN storage supporting breakthroughs in automomous vehicles and data-intensive research at the University of Michigan ...

Supermicro ships world's best performance, capacity and end-to-end throughput 1U all-flash storage server optimized with Samsung NF1 NVMe storage ...

Tech industry mentor Marian Gazdik joins Tachyum Board of Advisors ...

GigaSpaces brings enterprise-class real-time analytics, AI and extreme data processing to Kubernetes ...

Fujitsu launches liquid immersion cooling system that lowers total cost of ownership ...

Applications

NERSC, Intel and Cray harness the power of deep learning to better understand the Universe ...

Topology, physics and machine learning take on climate research data challenges ...

NCSA Faculty Fellow part of $25 million software institute to enable discoveries in high-energy physics ...

Miguel Holgado uses Blue Waters supercomputer to understand how binary compact-object mergers form ...

Veiled supernovae provide clue to stellar evolution ...

Experiment obtains entanglement of six light waves with a single laser ...

The Cloud

Baidu Cloud collaborates with Intel AI to advance financial services, shipping and video processing ...

Veiled supernovae provide clue to stellar evolution

Artist's impression of a red supergiant surrounded with thick circumstellar matter. Credit: NAOJ.3 Sep 2018 Tokyo - At the end of its life, a red supergiant star explodes in a hydrogen-rich supernova. By comparing observation results to simulation models, an international research team found that in many cases this explosion takes place inside a thick cloud of circumstellar matter shrouding the star. This result completely changes our understanding of the last stage of stellar evolution.

The research team led by Francisco Förster at the University of Chile used the Blanco Telescope to find 26 supernovae coming from red supergiants. Their goal was to study the shock breakout, a brief flash of light preceding the main supernova explosion. But they could not find any signs of this phenomenon. On the other hand, 24 of the supernovae brightened faster than expected.

To solve this mystery, Takashi Moriya at the National Astronomical Observatory of Japan (NAOJ) simulated 518 models of supernovae brightness variations and compared them with the observational results. The team found that models with a layer of circumstellar matter about 10 percent the mass of the Sun surrounding the supernovae matched the observations well. This circumstellar matter hides the shock breakout, trapping its light. The subsequent collision between the supernova ejecta and the circumstellar matter creates a strong shock wave that produces extra light, causing it to brighten more quickly.

Takashi Moriya explained: "Near the end of its life, some mechanism in the star's interior must cause it to shed mass that then forms a layer around the star. We don't yet have a clear idea of the mechanism causing this mass loss. Further study is needed to get a better understanding of the mass loss mechanism. This will also be important in revealing the supernova explosion mechanism and the origin of the diversity in supernovae."

These observations were performed by the Blanco Telescope at Cerro Tololo Inter-American Observatory during six nights in 2014 and eight nights in 2015. The simulations by Takashi Moriya were performed on the NAOJ Center for Computational Astrophysics PC cluster. This research was published inNature Astronomyon September 3, 2018. The paper titled " The delay of shock breakout due to circumstellar material evident in most type II supernovae " is authored by Francisco Förster et al.
Source: National Astronomical Observatory of Japan

Back to Table of contents

Primeur weekly 2018-09-10

Quantum computing

Quantum computing in any language ...

Defiance ETFs launches QTUM, the Quantum Computing ETF, offering investors exposure to leaders in the field ...

Light exchange - A quantum gate between atoms and photons may help in scaling up quantum computers ...

Focus on Europe

cOAlition S: making Open Access a reality by 2020 ...

National Centre for Supercomputing Applications in Sofia, Bulgaria hosts PRACE Winter School on Computational Chemistry, Biochemistry and Medicinal chemistry - Methods and Tools ...

Middleware

DataDirect Networks completes $60 million Tintri acquisition and enters enterprise virtualization market ...

Bright Computing announces partnership with Japanese firm Towa Electric ...

Introduction of Altair Inspire and Altair 365 poised to transform product development ...

Hardware

DDN storage supporting breakthroughs in automomous vehicles and data-intensive research at the University of Michigan ...

Supermicro ships world's best performance, capacity and end-to-end throughput 1U all-flash storage server optimized with Samsung NF1 NVMe storage ...

Tech industry mentor Marian Gazdik joins Tachyum Board of Advisors ...

GigaSpaces brings enterprise-class real-time analytics, AI and extreme data processing to Kubernetes ...

Fujitsu launches liquid immersion cooling system that lowers total cost of ownership ...

Applications

NERSC, Intel and Cray harness the power of deep learning to better understand the Universe ...

Topology, physics and machine learning take on climate research data challenges ...

NCSA Faculty Fellow part of $25 million software institute to enable discoveries in high-energy physics ...

Miguel Holgado uses Blue Waters supercomputer to understand how binary compact-object mergers form ...

Veiled supernovae provide clue to stellar evolution ...

Experiment obtains entanglement of six light waves with a single laser ...

The Cloud

Baidu Cloud collaborates with Intel AI to advance financial services, shipping and video processing ...