« Antibiotics damage human cells | Main | Hey boy, you really activate my ventral midbrain. »
Friday
Jun282013

Sassy supernovae: A new 3D simulation shows dying stars slosh

These are simulated stars, not what you're thinking. I know what you're thinking *(see last graphic).It's no secret that when a massive star dies, it often does so dramatically--in a huge explosion known as a supernova. Supernovae outshine entire galaxies and enrich the universe with the heavy elements that are necessary to make those gold chains you wear.

It is kind of a secret, though, that scientists don't really know how supernovae happen. When they try to recreate these blasts using simulations, the physical laws plus the physical material don't lead to the explosions we see IRL.

Scientists have solid ideas about stars' interiors at the ends of their lives. And good ideas about the reasons stars might choose to ex- instead of implode. But when they put the details of those good ideas together, a) that's a lot of details, b) the combo does not a supernova make.

Some supernovae leave behind neutron stars, objects about 1.4 times the mass of the Sun that are crunched down to the diameter of an earthly city and spin up to 716 times per second. They're like gigantic atomic nuclei, if gigantic atomic nuclei were also possessed carousels.

So when a massive star dies, the stellar core is collapses inward and the supernova expels material out into space. Current simulations get stuck around the point where the implosion becomes an explosion. But these simulations often are two-dimensional and involve vastly simplified parameters. After all, there are only so many supercomputers (and also only so many people who want to write code that robust).

The theory out in front right now says that neutrinos -- high-energy, low-mass particles -- result from the collapse and, in their excitement to leave the star's deathbed, collide mightily with the star's outer layers. The layers absorb the neutrinos' mighty energy, causing a shock wave that results in the actual supernova.

With 150 million processor hours, 16,000 cores working in parallel, and 4.5 months of continuous computing, a research team headed in Garching was able to simulate -- for the first time -- a detail-oriented 3D supernova explosion. This simulation produced "many Terabytes" of data, so after those 4.5 months of chugging were over, the work was far from done.

After analysis, they found evidence that neutrinos were heating their simulated gas: it was bubbling and producing fat-headed plumes, which convection, fueled by temperature increase, would cause in a fluid. They also saw sloshing, which other scientists have seen and dubbed "Standing Accretion Shock Instability" (SASI). In some other simulations, SASI had just led to more SASI, leaving the researchers with comically sloppy stars that wiggled but never exploded.*These are not alien fetusus hidden for years by the government (Hanke, et al.).

SASI had not been observed at all in an ultra-complex simulation like this one, but it's important because it explains asymmetric supernova. If a star is just sitting there one moment and then explodes the next, the material should all go out at the same speed at the same time. But if the star is being SASI (get it? sassy?), the internal velocities and distributions of its plasma are not homogeneous, so the explosion won't be, either.

And from a "process of science" standpoint, I think it's cool that the team can find experimental evidence to support the results of their 0101010110 supernovae. The neutrinos that we receive on Earth and the gravitational waves that the star's sloshings impress upon spacetime are both detectable (or at least theoretically so).

So what are the team members going to do now that they've modeled a supernova?

Go to Disney World?

No: According to the press release, they "plan to perform more and longer simulations."

ResearchBlogging.org

Hanke, Florian. (2013-06-10) SASI ACTIVITY IN THREE-DIMENSIONAL NEUTRINO-HYDRODYNAMICS SIMULATIONS OF SUPERNOVA CORES. , 770(1), 66. DOI: 10.1088/0004-637X/770/1/66  

EmailEmail Article to Friend

References (69)

References allow you to track sources for this article, as well as articles that were written in response to this article.
  • Response
    find Sacred Body Studio deals, Sacred Body Studio reviews at http://www.dealsextra.com.au/business/Sacred-Body-Studio.php
  • Response
    Response: xtreme no
  • Response
    Response: Hollister
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions,Makala hii iliandikwa halisi Hata hivyo, kama unataka kuona makala kuhusiana unaweza kuona taarifa hapa:Hollister,
  • Response
    Response: boost your bust
  • Response
    Response: comment-188828
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    These supernovae appear at the terminate of a giant luminary's age, whereas its nuclear stoke is dead further it is no longer supported by the liberate of nuclear force. If the luminary's unyielding heart is colossal plenty, it resolution founder moreover grow a supernova.
  • Response
  • Response
  • Response
    Response: ace parking
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: sports science
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: Eliot Harris
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: fake diamond rings
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: view site…
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
  • Response
    Response: apartment cleaning
    sassy supernovae: a new 3d simulation shows dying stars slosh - blog - smaller questions
  • Response
    Response: autosurf
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: hosting24 coupon
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: Bradley Kurgis
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: Leger
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: Jobb
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: utahwebdesign.me
    SASI had not been noticed at all in an ultra-complex simulator like this one, but it's essential because it describes asymmetric supernova. Present models get trapped around the factor where the implosion becomes an blast.
  • Response
    Response: SidneFethers
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: HIV window period
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    go here for the best kansas city new car dealer available
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: gamezet.Com
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: bit.ly
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: company website
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: fun run cheats
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: Niagara therapy
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: good sex positions
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: GoPro Accessories
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: make fast money
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: Camera
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
  • Response
    Response: Anthony Alles
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: raspberry ketone
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: fish oil benefits
    Sassy supernovae: A new 3D simulation shows dying stars slosh - Blog - Smaller Questions
  • Response
    Response: olej arganowy
  • Response

Reader Comments (1)

Attractive info. Thanks, I am really impressed with the quality of what you have provided in your article.

August 18, 2014 | Unregistered Commentervastgoed beleggen

PostPost a New Comment

Enter your information below to add a new comment.

My response is on my own website »
Author Email (optional):
Author URL (optional):
Post:
 
Some HTML allowed: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <code> <em> <i> <strike> <strong>