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Category: cosmology – Page 5

Discovery of young eclipsing binary system offers insight into early stellar evolution

An international team of astronomers reports the discovery of a new pre-main-sequence eclipsing binary system. The newfound binary, designated MML 48, consists of two young low-mass stars. The finding will be published in the upcoming issue of the Astronomy & Astrophysics journal.

Stellar systems showing regular light variations due to one of the stars passing directly in front of its companion are known as eclipsing binaries (EBs). In these systems, the orbit plane of the two stars lies so nearly in the line of sight of the observer that the components undergo mutual eclipses. EBs can provide direct accurate measurement of the mass, radius and effective temperature of stars; therefore, they are essential for testing and calibrating theoretical stellar-evolution models.

Astronomers are especially interested in finding new young EBs. This is due to the fact that such binaries constrain pre-main-sequence (PMS) stellar evolution models in the regime when the temperatures, luminosities, and radii of stars are changing rapidly as they settle onto the main sequence (MS).

Dark Matter “Wind” May Finally Be Detectable With New Superconducting Tech

Physicists have created a novel detector capable of probing dark matter particles at unprecedentedly low masses. About 80 percent of the universe’s mass is believed to be dark matter, yet the makeup and organization of its particles remain largely unknown, leaving physicists with fundamental ques

First-ever complete measurement of a black-hole recoil achieved thanks to gravitational waves

A team of researchers led by the Instituto Galego de Física de Altas Enerxías (IGFAE) from the University of Santiago de Compostela (Spain) has measured for the first time the speed and direction of the recoil of a newborn black hole formed through the merger of two others. The result, published today in the journal Nature Astronomy, offers new insights into some of the most extreme events in the universe.

Gravitational waves (GWs) are ripples in the fabric of spacetime that travel away from their sources at the speed of light, encoding information about them. They provide a completely novel information channel that allows us to observe astrophysical phenomena that do not emit light—such as black hole mergers—and obtain new information about processes that do—such as supernovae or neutron-star mergers.

While Einstein predicted the existence of GWs in 1916, they are so weak that detecting them requires incredibly sensitive detectors and extremely violent astrophysical events such as black-hole mergers, supernovae or the Big Bang itself.

An American Collider Is Finally Ready to Recreate Matter from the Beginning of Time

Today, the absolute heart of particle physics is located in Geneva, Switzerland at CERN’s Large Hadron Collider. This instrument’s unmatched size, power, and precision make it the ultimate tool for exploring high-energy particle physics. However, one tool can’t do everything, and even immensely useful ones like the LHC sometimes need a helping hand.

That’s where Brookhaven National Laboratory’s (BNL) Relativistic Heavy Ion Collider (RHIC) comes in. In 2015, the U.S. Department of Energy approved an upgrade to the Pioneering High Energy Nuclear Interaction eXperiment (PHENIX)—an instrument originally designed to explore the components of the quark-gluon plasma (QGP) that formed one millionth of a second after the Big Bang. According to Edward O’Brien (a physicist from BNL), the idea behind this super PHENIX, or sPHENIX, was to “provide physics results which focused on jets and heavy flavor [of quarks] that complemented and overlapped with the Heavy Ion physics results being generated by the experiments at the CERN Large Hadron Collider.”

The universe’s first magnetic fields were ‘comparable’ to the human brain — and still linger within the ‘cosmic web’

New computer simulations suggest the first magnetic fields that emerged after the Big Bang were much weaker than expected — containing the equivalent magnetic energy of a human brain.

Quantum Computers Mimic Black Holes To Probe Cosmic Secrets

The difference between traditional computers and quantum computers is narrowing in their ability to simulate the scrambling of quantum information. A team of four researchers at RIKEN has successfully used two small quantum computers to simulate quantum information scrambling, a key process in qu

These Strange Stars Could Reveal the True Nature of Dark Matter

A new study suggests that mysterious “dark dwarfs” could provide crucial insights into the true nature of dark matter. Celestial objects known as dark dwarfs might be concealed near the center of our galaxy, and scientists believe they could help unlock the secrets of one of the biggest mysteries i

Inflation without an inflaton! This Model Challenges Big Bang Inflation

A new study suggests the universe didn’t need inflation to begin. Instead, gravitational waves could explain how structure formed in the early cosmos.

Paper link: https://journals.aps.org/prresearch/a…

Chapters:
00:00 Introduction.
00:40 The Discovery/Event.
02:42 Scientific Significance & Theories.
04:48 Implications and What’s Next.
07:16 Outro.
07:54 Enjoy.

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MUSIC LINK: https://pixabay.com/music/pulses-star…
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