neutron stars tagged posts

A New Type of Matter discovered inside Neutron Stars

Confirming the existence of quark cores inside neutron stars has been one of the most important goals of neutron star physics for the last 40 years. Credit: Jyrki Hokkanen, CSC – IT Center for Science

A Finnish research group has found strong evidence for the presence of exotic quark matter inside the cores of the largest neutron stars in existence. The conclusion was reached by combining recent results from theoretical particle and nuclear physics to measurements of gravitational waves from neutron star collisions.

All normal matter surrounding us is composed of atoms, whose dense nuclei, comprising protons and neutrons, are surrounded by negatively charged electrons...

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‘Strange’ Glimpse into Neutron Stars and Symmetry Violation

Inner vertex components of the STAR detector at the Relativistic Heavy Ion Collider (righthand view) allow scientists to trace tracks from triplets of decay particles picked up in the detector’s outer regions (left) to their origin in a rare “antihypertriton” particle that decays just outside the collision zone. Measurements of the momentum and known mass of the decay products (a pi+ meson, antiproton, and antideuteron) can then be used to calculate the mass and binding energy of the parent particle. Doing the same for the hypertriton (which decays into different “daughter” particles) allows precision comparisons of these matter and antimatter varieties.

New results from precision particle detectors at the Relativistic Heavy Ion Collider (RHIC) offer a fresh glimpse of the particle...

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The Force is Strong in Neutron Stars

Researchers from MIT and elsewhere have compared “snapshots” of pairs of nucleons separated by various distances, and for the first time observed a key transition in the behavior of the strong nuclear force — the glue that binds the building blocks of matter.
Image credit: JLab

A new study identifies a transition in the strong nuclear force that illuminates the structure of a neutron star’s core. Most ordinary matter is held together by an invisible subatomic glue known as the strong nuclear force – one of the four fundamental forces in nature, along with gravity, electromagnetism, and the weak force. The strong nuclear force is responsible for the push and pull between protons and neutrons in an atom’s nucleus, which keeps an atom from collapsing in on itself.

In atomic nucl...

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Glitch in Neutron Star reveals its Hidden Secrets

During the glitch the star started spinning even faster
An artistic impression of the three components in the neutron star. Credit: Carl Knox.

Neutron stars are not only the most dense objects in the Universe, but they rotate very fast and regularly. Until they don’t. Occasionally these neutron stars start to spin faster, caused by portions of the inside of the star moving outwards. It’s called a “glitch” and it provides astronomers a brief insight into what lies within these mysterious objects.

In a paper published today in the journal, Nature Astronomy, a team from Monash University, the ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav), McGill University in Canada, and the University of Tasmania, studied the Vela Pulsar, a neutron star in the southern sky, that is 1,000 light years away.

According to the paper’s ...

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