• HOME
  • NEWS
    • BIOENGINEERING
    • SCIENCE NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • FORUM
    • INSTAGRAM
    • TWITTER
  • CONTACT US
Monday, January 18, 2021
BIOENGINEER.ORG
No Result
View All Result
  • Login
  • HOME
  • NEWS
    • BIOENGINEERING
    • SCIENCE NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • FORUM
    • INSTAGRAM
    • TWITTER
  • CONTACT US
  • HOME
  • NEWS
    • BIOENGINEERING
    • SCIENCE NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • FORUM
    • INSTAGRAM
    • TWITTER
  • CONTACT US
No Result
View All Result
Bioengineer.org
No Result
View All Result
Home NEWS Science News Chemistry

Researchers validate theory that neutrinos shape the universe

Bioengineer by Bioengineer
December 2, 2020
in Chemistry
0
Share on FacebookShare on TwitterShare on LinkedinShare on RedditShare on Telegram

IMAGE

Credit: Kavli IPMU

The effect that nearly massless, subatomic particles called neutrinos have on the formation of galaxies has long been a cosmological mystery–one that physicists have sought to measure since discovering the particles in 1956.

But an international research team including the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU) Principal Investigator Naoki Yoshida, who is also a professor in the department of physics at the University of Tokyo, has created cosmological simulations that accurately depict the role of neutrinos in the evolution of the universe. Their study was recently published in The Astrophysical Journal.

Missouri University of Science and Technology (Missouri S&T) cosmologist Dr. Shun Saito, an assistant professor of physics and a researcher on the team, says the work is a milestone in the process of simulating the formation of the structure of the universe. Saito is also a visiting associate scientist at the Kavli IPMU.

The team used a system of differential equations known as the Vlasov-Poisson equations to explain how neutrinos move through the universe with different values assigned to their mass.

The technique accurately represented the velocity distribution function of the neutrinos and followed its evolution over time. The researchers then examined the effects of neutrinos on galaxy formation and evolution.

Their results showed that neutrinos suppress the clustering of dark matter–the undefined mass in the universe–and, in turn, galaxies. They found that neutrino-rich regions are strongly correlated with massive galaxy clusters, and that the effective temperature of the neutrinos varies substantially depending on the mass of the neutrino.

The researchers say that the most stringent experiments used to estimate neutrino mass are cosmological observations, but those can only be relied upon if simulation predictions are accurate.

“Overall, our findings are consistent with both theoretical predictions and the results of previous simulations,” says Dr. Kohji Yoshikawa from the Center for Computational Sciences at the University of Tsukuba and lead author of the study. “It is reassuring that the results from entirely different simulation approaches agree with each other.”

“Our simulations are important because they set constraints on the unknown quantity of the neutrino mass,” says Saito from Missouri S&T. “Neutrinos are the lightest particles we know of. We only recently learned neutrinos have mass from the discovery featured in the 2015 Nobel Prize in physics.”

That prize awarded two scientists, including Kavli IPMU Principal Investigator Takaaki Kajita, who is also the Director at the Institute for Cosmic Ray Research, University of Tokyo, for their separate discoveries that one kind of neutrino can change into another, which showed that neutrinos have mass.

“Our work might ultimately lead to a robust determination of the neutrino mass,” Saito says.

###

Dr. Satoshi Tanaka, a postdoctoral fellow at the Yukawa Institute for Theoretical Physics at Kyoto University, was the fourth member of the study, titled “Cosmological Vlasov-Poisson Simulations of Structure Formation with Relic Neutrinos: Nonlinear Clustering and the Neutrino Mass.”

Authors: Kohji Yoshikawa (1), Satoshi Tanaka (2), Naoki Yoshida (3, 4, 5), Shun Saito (6, 4)

Author affiliation:

    1. Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan

    2. Yukawa Institute for Theoretical Physics, Kyoto University, Kitashirakawa Oiwake-Cho, Sakyo-Ku, Kyoto 606-8502, Japan

    3. Department of Physics, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan

    4. Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan

    5. Research Center for the Early Universe, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan

    6. Institute for Multi-messenger Astrophysics and Cosmology, Department of Physics, Missouri University of Science and Technology, 1315 N Pine St, Rolla, MO 65409

Abstract of the paper: https://iopscience.iop.org/article/10.3847/1538-4357/abbd46
Preprint (arXiv.org)

Research contact:

Naoki Yoshida

Principal Investigator

Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo

Professor

Department of Physics, the University of Tokyo

E-mail: [email protected]

Media Contact
John Amari
[email protected]

Original Source

http://www.ipmu.jp/en/20201201-VlasovPoisson

Related Journal Article

http://dx.doi.org/10.3847/1538-4357/abbd46

Tags: AstronomyAstrophysicsSpace/Planetary Science
Share12Tweet8Share2ShareShareShare2

Related Posts

IMAGE

How cells move and don’t get stuck

January 18, 2021
IMAGE

New method to assist fast-tracking of vaccines for pre-clinical tests

January 18, 2021

Synthesis of potent antibiotic follows unusual chemical pathway

January 18, 2021

A ‘super-puff’ planet like no other

January 18, 2021
Next Post
IMAGE

Cell membranes in super resolution

IMAGE

A French team has improved the measurement of a fundamental physical constant

Leave a Reply Cancel reply

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.

POPULAR NEWS

  • IMAGE

    The map of nuclear deformation takes the form of a mountain landscape

    53 shares
    Share 21 Tweet 13
  • Blood pressure drug may be key to increasing lifespan, new study shows

    44 shares
    Share 18 Tweet 11
  • New drug form may help treat osteoporosis, calcium-related disorders

    39 shares
    Share 16 Tweet 10
  • People living with HIV face premature heart disease and barriers to care

    58 shares
    Share 23 Tweet 15

About

We bring you the latest biotechnology news from best research centers and universities around the world. Check our website.

Follow us

Tags

Medicine/HealthBiologycancerInfectious/Emerging DiseasesClimate ChangePublic HealthMaterialsChemistry/Physics/Materials SciencesEcology/EnvironmentCell BiologyTechnology/Engineering/Computer ScienceGenetics

Recent Posts

  • Smart vaccine scheme quick to curb rabies threat in African cities
  • How cells move and don’t get stuck
  • New method to assist fast-tracking of vaccines for pre-clinical tests
  • New management approach can help avoid species vulnerability or extinction
  • Contact Us

© 2019 Bioengineer.org - Biotechnology news by Science Magazine - Scienmag.

No Result
View All Result
  • Homepages
    • Home Page 1
    • Home Page 2
  • News
  • National
  • Business
  • Health
  • Lifestyle
  • Science

© 2019 Bioengineer.org - Biotechnology news by Science Magazine - Scienmag.

Welcome Back!

Login to your account below

Forgotten Password?

Create New Account!

Fill the forms below to register

All fields are required. Log In

Retrieve your password

Please enter your username or email address to reset your password.

Log In