Definitions for neutron star
neu·tron star

Princeton's WordNetRate this definition:0.0 / 0 votes

1. neutron starnoun

   a star that has collapsed under its own gravity; it is composed of neutrons

WiktionaryRate this definition:5.0 / 1 vote

1. neutron starnoun

   A degenerate star that has been so collapsed by gravity that its electrons and protons have been merged into neutrons by the intense pressure. The solid mass of neutrons is sometimes called neutronium.

WikipediaRate this definition:0.0 / 0 votes

1. Neutron star

   A neutron star is the collapsed core of a massive supergiant star, which had a total mass of between 10 and 25 solar masses, possibly more if the star was especially metal-rich. Except for black holes and some hypothetical objects (e.g. white holes, quark stars, and strange stars), neutron stars are the smallest and densest currently known class of stellar objects. Neutron stars have a radius on the order of 10 kilometres (6 mi) and a mass of about 1.4 solar masses. They result from the supernova explosion of a massive star, combined with gravitational collapse, that compresses the core past white dwarf star density to that of atomic nuclei. Once formed, they no longer actively generate heat and cool over time; however, they may still evolve further through collision or accretion. Most of the basic models for these objects imply that neutron stars are composed almost entirely of neutrons (subatomic particles with no net electrical charge and with slightly larger mass than protons); the electrons and protons present in normal matter combine to produce neutrons at the conditions in a neutron star. Neutron stars are partially supported against further collapse by neutron degeneracy pressure, a phenomenon described by the Pauli exclusion principle, just as white dwarfs are supported against collapse by electron degeneracy pressure. However, neutron degeneracy pressure is not by itself sufficient to hold up an object beyond 0.7 M☉ and repulsive nuclear forces play a larger role in supporting more massive neutron stars. If the remnant star has a mass exceeding the Tolman–Oppenheimer–Volkoff limit of around 2 solar masses, the combination of degeneracy pressure and nuclear forces is insufficient to support the neutron star. It continues collapsing to form a black hole. The most massive neutron star detected so far, PSR J0952–0607, is estimated to be 2.35±0.17 solar masses.Neutron stars that can be observed are very hot and typically have a surface temperature of around 600000 K. Neutron star material is remarkably dense: a normal-sized matchbox containing neutron-star material would have a weight of approximately 3 billion tonnes, the same weight as a 0.5 cubic kilometre chunk of the Earth (a cube with edges of about 800 metres) from Earth's surface. Their magnetic fields are between 108 and 1015 (100 million and 1 quadrillion) times stronger than Earth's magnetic field. The gravitational field at the neutron star's surface is about 2×1011 (200 billion) times that of Earth's gravitational field. As the star's core collapses, its rotation rate increases due to conservation of angular momentum, and newly formed neutron stars rotate at up to several hundred times per second. Some neutron stars emit beams of electromagnetic radiation that make them detectable as pulsars. Indeed, the discovery of pulsars by Jocelyn Bell Burnell and Antony Hewish in 1967 was the first observational suggestion that neutron stars exist. The radiation from pulsars is thought to be primarily emitted from regions near their magnetic poles. If the magnetic poles do not coincide with the rotational axis of the neutron star, the emission beam will sweep the sky. When seen from a distance, if the observer is somewhere in the path of the beam, it will appear as pulses of radiation coming from a fixed point in space (the so-called "lighthouse effect"). The fastest-spinning neutron star known is PSR J1748-2446ad, rotating at a rate of 716 times a second or 43,000 revolutions per minute, giving a linear speed at the surface on the order of 0.24 c (i.e., nearly a quarter the speed of light). There are thought to be around one billion neutron stars in the Milky Way, and at a minimum several hundred million, a figure obtained by estimating the number of stars that have undergone supernova explosions. However, most are old and cold and radiate very little; most neutron stars that have been detected occur only in certain situations in which they do radiate, such as if they are a pulsar or part of a binary system. Slow-rotating and non-accreting neutron stars are almost undetectable; however, since the Hubble Space Telescope detection of RX J1856.5−3754 in the 1990s, a few nearby neutron stars that appear to emit only thermal radiation have been detected. Soft gamma repeaters are conjectured to be a type of neutron star with very strong magnetic fields, known as magnetars, or alternatively, neutron stars with fossil disks around them.Neutron stars in binary systems can undergo accretion which typically makes the system bright in X-rays while the material falling onto the neutron star can form hotspots that rotate in and out of view in identified X-ray pulsar systems. Additionally, such accretion can "recycle" old pulsars and potentially cause them to gain mass and spin-up to very fast rotation rates, forming the so-called millisecond pulsars. These binary systems will continue to evolve, and eventually the companions can become compact objects such as whi

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1. neutron star

   A neutron star is a celestial object that is the remnant of a supernova explosion of a massive star, typically having a mass greater than the sun but compressed into a volume just about 20 kilometers in diameter. These stars are primarily composed of neutrons, extremely dense particles, and hence are known for their considerable density. A neutron star's gravitational field is also very strong, and they often emit beams of radiation, observed as pulses of energy known as pulsars if pointed towards the Earth.

WikidataRate this definition:0.0 / 0 votes

1. Neutron star

   A neutron star is a type of stellar remnant that can result from the gravitational collapse of a massive star during a Type II, Type Ib or Type Ic supernova event. Such stars are composed almost entirely of neutrons, which are subatomic particles without net electrical charge and with slightly larger mass than protons. Neutron stars are very hot and are supported against further collapse by quantum degeneracy pressure due to the phenomenon described by the Pauli exclusion principle. This principle states that no two neutrons can occupy the same place and quantum state simultaneously. A typical neutron star has a mass between about 1.4 and 3.2 solar masses, with a corresponding radius of about 12 km if the Akmal–Pandharipande–Ravenhall equation of state is used. In contrast, the Sun's radius is about 60,000 times that. Neutron stars have overall densities predicted by the APR EOS of 3.7×10^17 to 5.9×10^17 kg/m³, which compares with the approximate density of an atomic nucleus of 3×10^17 kg/m³. The neutron star's density varies from below 1×10^9 kg/m³ in the crust, increasing with depth to above 6×10^17 or 8×10^17 kg/m³ deeper inside. This density is approximately equivalent to the mass of a Boeing 747 compressed to the size of a small grain of sand.

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How to pronounce neutron star?

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How to say neutron star in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of neutron star in Chaldean Numerology is: 8

2. Pythagorean Numerology

   The numerical value of neutron star in Pythagorean Numerology is: 3

Examples of neutron star in a Sentence

1. Imre Bartos:

   Luckily, neutron-star mergers only happen roughly every 100,000 years in the Milky Way, and ones that happen nearby do so less often, so we are not in any immediate danger in any way. and understand how they influenced the evolution of the galaxy.

2. Sharon Morsink:

   In that work, we have to assume that Einsteins theory of gravity is correct, since the data analysis is already very complex, so tests of Einsteins gravity using neutron stars really make me feel better about our assumption that Einsteins theory describes the gravity of a neutron star correctly!

3. Natasha Hurley-Walker:

   It's a type of slowly spinning neutron star that has been predicted to exist theoretically, but nobody expected to directly detect one like this because we didn't expect them to be so bright. Somehow it's converting magnetic energy to radio waves much more effectively than anything we've seen before.

4. Daryl Haggard:

   We think of this as maybe a shattering of the neutron star surface, or some really violent event on the neutron star that causes it to get very, very bright and then fade slowly over time.

5. Susan Scott:

   We have always thought that there should be binary systems of a black hole and a neutron star circling each other out in space, so if this event is confirmed, it would be the first evidence that such systems do actually exist, and that some of them are spiraling closer and closer and eventually smashing together.

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=neutron star
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Neutron_Star
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Neutron_Star
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=neutron star