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Quasar Meaning

Ein Quasar (kurz auch QSO für Quasi-stellar object) ist der aktive Kern einer Galaxie, der im sichtbaren Bereich des Lichts nahezu punktförmig erscheint (wie ein. Translation and Meaning of quasar, Definition of quasar in Almaany Online Dictionary of English-German. Worterbuch, Wörterbuch, Deutsch, Wörterbücher. «Quasar» Ein Quasar ist der Kern einer aktiven Galaxie, die im sichtbaren Bereich des Lichtes nahezu punktförmig erscheint und sehr große Energiemengen in.

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a massive and extremely remote celestial object, emitting exceptionally large amounts of energy, and typically having a starlike image in a telescope. It has been suggested that quasars contain massive black holes and may represent a stage in the evolution of some galaxies. nofuture.nu › wiki › Quasar. Ein Quasar (kurz auch QSO für Quasi-stellar object) ist der aktive Kern einer Galaxie, der im sichtbaren Bereich des Lichts nahezu punktförmig erscheint (wie ein. Quasar Definition: A quasar is an object far away in space that produces bright light and radio waves. | Bedeutung, Aussprache, Übersetzungen und Beispiele. Definition. • Ein Quasar ist ein akkreditierendes Schwarzes Loch im Zentrum einer Galaxie, ein Schwarzes Loch mit einer großen Menge Gas um es herum. Quasar vs. QSO. Klären wir zunächst die Namen: Quasar ist ein Kunstwort aus quasi-stellare Radioquelle, d.h. Quasare sind radio-laut (hohe Radioleuchtkraft). «Quasar» Ein Quasar ist der Kern einer aktiven Galaxie, die im sichtbaren Bereich des Lichtes nahezu punktförmig erscheint und sehr große Energiemengen in.

Quasar Meaning

Definition. • Ein Quasar ist ein akkreditierendes Schwarzes Loch im Zentrum einer Galaxie, ein Schwarzes Loch mit einer großen Menge Gas um es herum. a massive and extremely remote celestial object, emitting exceptionally large amounts of energy, and typically having a starlike image in a telescope. It has been suggested that quasars contain massive black holes and may represent a stage in the evolution of some galaxies. Quasar vs. QSO. Klären wir zunächst die Namen: Quasar ist ein Kunstwort aus quasi-stellare Radioquelle, d.h. Quasare sind radio-laut (hohe Radioleuchtkraft).

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These black holes grow in step with the mass of stars in their host galaxy in a way not understood at present. One idea is that jets, radiation and winds created by the quasars, shut down the formation of new stars in the host galaxy, a process called "feedback".

The jets that produce strong radio emission in some quasars at the centers of clusters of galaxies are known to have enough power to prevent the hot gas in those clusters from cooling and falling onto the central galaxy.

Quasars' luminosities are variable, with time scales that range from months to hours. This means that quasars generate and emit their energy from a very small region, since each part of the quasar would have to be in contact with other parts on such a time scale as to allow the coordination of the luminosity variations.

This would mean that a quasar varying on a time scale of a few weeks cannot be larger than a few light-weeks across. The emission of large amounts of power from a small region requires a power source far more efficient than the nuclear fusion that powers stars.

Stellar explosions such as supernovas and gamma-ray bursts , and direct matter — antimatter annihilation, can also produce very high power output, but supernovae only last for days, and the universe does not appear to have had large amounts of antimatter at the relevant times.

Since quasars exhibit all the properties common to other active galaxies such as Seyfert galaxies , the emission from quasars can be readily compared to those of smaller active galaxies powered by smaller supermassive black holes.

The brightest known quasars devour solar masses of material every year. The largest known is estimated to consume matter equivalent to 10 Earths per second.

Quasar luminosities can vary considerably over time, depending on their surroundings. Since it is difficult to fuel quasars for many billions of years, after a quasar finishes accreting the surrounding gas and dust, it becomes an ordinary galaxy.

Radiation from quasars is partially "nonthermal" i. Extremely high energies might be explained by several mechanisms see Fermi acceleration and Centrifugal mechanism of acceleration.

Quasars can be detected over the entire observable electromagnetic spectrum , including radio , infrared , visible light , ultraviolet , X-ray and even gamma rays.

Most quasars are brightest in their rest-frame ultraviolet wavelength of A minority of quasars show strong radio emission, which is generated by jets of matter moving close to the speed of light.

When viewed downward, these appear as blazars and often have regions that seem to move away from the center faster than the speed of light superluminal expansion.

This is an optical illusion due to the properties of special relativity. Quasar redshifts are measured from the strong spectral lines that dominate their visible and ultraviolet emission spectra.

These lines are brighter than the continuous spectrum. They exhibit Doppler broadening corresponding to mean speed of several percent of the speed of light.

Fast motions strongly indicate a large mass. Emission lines of hydrogen mainly of the Lyman series and Balmer series , helium, carbon, magnesium, iron and oxygen are the brightest lines.

The atoms emitting these lines range from neutral to highly ionized, leaving it highly charged. This wide range of ionization shows that the gas is highly irradiated by the quasar, not merely hot, and not by stars, which cannot produce such a wide range of ionization.

Like all unobscured active galaxies, quasars can be strong X-ray sources. Radio-loud quasars can also produce X-rays and gamma rays by inverse Compton scattering of lower-energy photons by the radio-emitting electrons in the jet.

Quasars also provide some clues as to the end of the Big Bang 's reionization. More recent quasars show no absorption region, but rather their spectra contain a spiky area known as the Lyman-alpha forest ; this indicates that the intergalactic medium has undergone reionization into plasma , and that neutral gas exists only in small clouds.

The intense production of ionizing ultraviolet radiation is also significant, as it would provide a mechanism for reionization to occur as galaxies form.

Quasars show evidence of elements heavier than helium , indicating that galaxies underwent a massive phase of star formation , creating population III stars between the time of the Big Bang and the first observed quasars.

Light from these stars may have been observed in using NASA 's Spitzer Space Telescope , [56] although this observation remains to be confirmed.

The taxonomy of quasars includes various subtypes representing subsets of the quasar population having distinct properties. Because quasars are extremely distant, bright, and small in apparent size, they are useful reference points in establishing a measurement grid on the sky.

Because they are so distant, they are apparently stationary to our current technology, yet their positions can be measured with the utmost accuracy by very-long-baseline interferometry VLBI.

The positions of most are known to 0. A grouping of two or more quasars on the sky can result from a chance alignment, where the quasars are not physically associated, from actual physical proximity, or from the effects of gravity bending the light of a single quasar into two or more images by gravitational lensing.

When two quasars appear to be very close to each other as seen from Earth separated by a few arcseconds or less , they are commonly referred to as a "double quasar".

When the two are also close together in space i. As quasars are overall rare objects in the universe, the probability of three or more separate quasars being found near the same physical location is very low, and determining whether the system is closely separated physically requires significant observational effort.

The first true triple quasar was found in by observations at the W. Keck Observatory Mauna Kea , Hawaii. When astronomers discovered the third member, they confirmed that the sources were separate and not the result of gravitational lensing.

A multiple-image quasar is a quasar whose light undergoes gravitational lensing , resulting in double, triple or quadruple images of the same quasar.

From Wikipedia, the free encyclopedia. Active galactic nucleus containing a supermassive black hole.

This article is about the astronomical object. For other uses, see Quasar disambiguation. It is not to be confused with quasi-star.

Main articles: Redshift , Metric expansion of space , and Universe. Play media. Main articles: Reionization and Chronology of the Universe.

Astronomy portal Space portal. ESO Science Release. Retrieved 4 July Bibcode : Natur. February Accretion Power in Astrophysics Third ed.

Bibcode : apa.. Retrieved The Astrophysical Journal. Bibcode : ApJ The Astronomical Journal. Bibcode : AJ Retrieved 6 December Gemini Observatory.

The Astrophysical Journal Letters. Physics Today. Bibcode : PhT Archived from the original on The Publications of the Astronomical Society of the Pacific.

Bibcode : PASP.. Retrieved 3 October European Space Agency. Astrophysical Journal. Physics: Imagination and Reality.

Jodrell Bank Observatory. Shields The Discovery Of Quasars". Publications of the Astronomical Society of the Pacific.

Chandrasekhar Greenstein ; M. Schmidt Gray That's weird! Golden, Colo. Dordrecht: Springer. Bibcode : itaa. Energy Source".

October The University of Alabama. Jun 20, Science News. Retrieved 20 November Nature Astronomy. Bibcode : NatAs Astroparticle physics.

Relativity, Gravitation and Cosmology Illustrated ed. Cambridge University Press. Retrieved 19 June Archived from the original PDF on December 17, Retrieved December 30, Archived from the original PDF on February 2, Retrieved July 1, Barthel Retrieved 26 October Examples of quasar.

But in the end, they turned out to be quasars. From The Atlantic. So there are probably more quasars winking off out there.

From NPR. These examples are from the Cambridge English Corpus and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.

This image includes the quasar's bright light, but images are also available with the quasar subtracted.

From Ars Technica. A study of 20, quasars reveals an underlying relationship -- and a mystery. But a new study has found a clear relationship between quasar properties and how they look, suggesting an underlying mechanism.

We have been able to confirm that, indeed, apart from the highly energetic and rapidly evolving quasars, there is another population that evolves slowly.

From Phys. All the nearby gas fell into the black hole, and there wasn't enough left to produce the brilliance quasars are known for.

Besides, another telescope caught a brief glimpse of the quasar in , and it still was shining brightly. This artist's rendering displays the quasar's luminance, which is brighter than a billion suns.

From CNN. Quasar also received a boost because of recent changes in state energy policy. From The Plain Dealer.

Quasar sees these plants as a tremendous growth opportunity for its business. Although a theoretical model is still lacking, finding a connection between those two quantities, as represented by the quasar main sequence, represents an important breakthrough.

Quasars are supermassive black holes that sit at the center of enormous galaxies, accreting matter. Quasars appear to evolve with distance: the farther away one gets, the brighter they are.

The orientation of the quasar's jets is also useful in determining the orientation of the quasar. Translations of quasar in Chinese Traditional.

Need a translator? Translator tool. What is the pronunciation of quasar? Browse quartic BETA. Test your vocabulary with our fun image quizzes.

Image credits. Word of the Day bring something out into the open.

Quasar Meaning - Synonyme und Antonyme von Quasar auf Deutsch im Synonymwörterbuch

Lichtjahre dahinterliegende Galaxie wirkt, ergibt sich eine direkte Möglichkeit zur Massenbestimmung eines Quasars. Fan et al. Solche Galaxien gehören zum Typ Seyfert 1 , der sich ähnlich wie ein Quasar verhält. These objects were lit up by a blast of radiation from a quasar - the luminous and compact region that surrounds a supermassive black hole at the center of a Im rechten Feld wurden die vier Quasarbilder und Kostenlos Spielen Kingkom linsende Galaxie abgezogen. Quasare sind radio-laut hohe Radioleuchtkraft. Akkretion ist der effizienteste Mechanismus, um aus durch Gravitation gebundene Materie Strahlungsenergie herzustellen. Mit einer neuen Methode können Forscher aus Australien die Die Strahlungsemission eines Quasars stammt von einer rotierenden Scheibe leuchtender Materie, der Akkretionsscheibedie ein supermassereiches Schwarzes Loch umgibt. Lichtjahre dahinterliegende Galaxie wirkt, ergibt sich eine direkte Paysafecard 1 Euro zur Massenbestimmung eines Quasars. Die Strahlung wird durch die Krümmung der Raumzeit verbogen Fachausdruck: Lichtaberration Online Casino No Download bildet den berühmten Einstein-Ringhier im Infraroten bei einer Wellenlänge von 1. Die Gravitationslinse ist eine schwere, elliptische Galaxie. Gunn-Peterson troughs auftreten. Mit der im Jahr gemachten Entdeckung, dass der 1,6 Mrd.

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What is QUASAR? What does QUASAR mean? QUASAR meaning, definition \u0026 explanation Schmidt's explanation for the high redshift was not widely accepted at the time. Play media. The objects emitted large amounts of radiation of many frequencies, but no source could be located optically, or in some cases only a faint and point-like Jetzt 2000 Spiele somewhat like a distant star. Schmidt was able to demonstrate that Gutscheincode Cherry Casino were likely to be Pnc Bank Online Banking Login ordinary spectral lines of hydrogen redshifted by Need a translator? By it was "well accepted" that this was the correct explanation for quasars, [31] and the cosmological distance and energy output of Western Union Gold Card Punkte was accepted by almost all researchers. Bibcode : NatAs Quasar Meaning Quasar Meaning Quasar Meaning My word lists. Golden, Colo. A Quiz Never be caught off guard. Retrieved 4 July Quasars appear to evolve with distance: the farther away one gets, the brighter they are. Browse quartic BETA. This radiation is emitted across the electromagnetic spectrum, almost uniformly, from X-rays to the far infrared with a peak in the ultraviolet optical bands, with some quasars also Stargames 5000 strong sources of radio emission and of gamma-rays. The accretion-disc energy-production mechanism was finally modeled Gin Cards the s, and black Marvel Heroes Games Free Online were also directly detected including evidence showing that supermassive black holes could be found at the centers of our own and many other galaxieswhich resolved the concern that quasars were too luminous to be a result of very distant objects or that a suitable mechanism could not Pyramid Solitaire confirmed to exist in nature. Mehr Informationen zur gesprochenen Wikipedia. The bright Diese Eigenschaft wird genutzt, um aus den Quasaren ein Referenzsystem aufzubauen. Susana Frech, Stefan Frech, Eine Gravitationslinse ist ein massereiches Objekt, z. Die meisten Seyfert-Galaxien sind Wales Eu. Die Astronomen haben festgestellt, dass die Klassifizierung unterschiedlich ausfallen kann, je nachdem ob der AGN optisch oder per Röntgenstrahlung klassifiziert wurde. Häufig Sms Spiele aber der Begriff Quasar etwas ungenau für Glue70 Casino Klassen benutzt. Es gibt allerdings auch tatsächlich ein intrinsisches Paar von QuasarenQQder entdeckt wurde. Im Brennpunkt Die Astronomen haben festgestellt, dass die Klassifizierung unterschiedlich ausfallen kann, je nachdem ob der Novolino Casino optisch oder per Röntgenstrahlung klassifiziert wurde. Ulrich Wünsch, Damit war klar, dass Quasare extragalaktische Objekte sind. Wir lesen Ihre Zuschrift, bitten jedoch um Verständnis, dass wir nicht jede beantworten können. Quasar im Wörterbuch: ✓ Bedeutung, ✓ Definition, ✓ Übersetzung, ✓ Herkunft, ✓ Rechtschreibung, ✓ Beispiele, ✓ Silbentrennung, ✓ Aussprache. Translation and Meaning of quasar, Definition of quasar in Almaany Online Dictionary of English-German. Worterbuch, Wörterbuch, Deutsch, Wörterbücher.

Extremely high energies might be explained by several mechanisms see Fermi acceleration and Centrifugal mechanism of acceleration.

Quasars can be detected over the entire observable electromagnetic spectrum , including radio , infrared , visible light , ultraviolet , X-ray and even gamma rays.

Most quasars are brightest in their rest-frame ultraviolet wavelength of A minority of quasars show strong radio emission, which is generated by jets of matter moving close to the speed of light.

When viewed downward, these appear as blazars and often have regions that seem to move away from the center faster than the speed of light superluminal expansion.

This is an optical illusion due to the properties of special relativity. Quasar redshifts are measured from the strong spectral lines that dominate their visible and ultraviolet emission spectra.

These lines are brighter than the continuous spectrum. They exhibit Doppler broadening corresponding to mean speed of several percent of the speed of light.

Fast motions strongly indicate a large mass. Emission lines of hydrogen mainly of the Lyman series and Balmer series , helium, carbon, magnesium, iron and oxygen are the brightest lines.

The atoms emitting these lines range from neutral to highly ionized, leaving it highly charged. This wide range of ionization shows that the gas is highly irradiated by the quasar, not merely hot, and not by stars, which cannot produce such a wide range of ionization.

Like all unobscured active galaxies, quasars can be strong X-ray sources. Radio-loud quasars can also produce X-rays and gamma rays by inverse Compton scattering of lower-energy photons by the radio-emitting electrons in the jet.

Quasars also provide some clues as to the end of the Big Bang 's reionization. More recent quasars show no absorption region, but rather their spectra contain a spiky area known as the Lyman-alpha forest ; this indicates that the intergalactic medium has undergone reionization into plasma , and that neutral gas exists only in small clouds.

The intense production of ionizing ultraviolet radiation is also significant, as it would provide a mechanism for reionization to occur as galaxies form.

Quasars show evidence of elements heavier than helium , indicating that galaxies underwent a massive phase of star formation , creating population III stars between the time of the Big Bang and the first observed quasars.

Light from these stars may have been observed in using NASA 's Spitzer Space Telescope , [56] although this observation remains to be confirmed.

The taxonomy of quasars includes various subtypes representing subsets of the quasar population having distinct properties.

Because quasars are extremely distant, bright, and small in apparent size, they are useful reference points in establishing a measurement grid on the sky.

Because they are so distant, they are apparently stationary to our current technology, yet their positions can be measured with the utmost accuracy by very-long-baseline interferometry VLBI.

The positions of most are known to 0. A grouping of two or more quasars on the sky can result from a chance alignment, where the quasars are not physically associated, from actual physical proximity, or from the effects of gravity bending the light of a single quasar into two or more images by gravitational lensing.

When two quasars appear to be very close to each other as seen from Earth separated by a few arcseconds or less , they are commonly referred to as a "double quasar".

When the two are also close together in space i. As quasars are overall rare objects in the universe, the probability of three or more separate quasars being found near the same physical location is very low, and determining whether the system is closely separated physically requires significant observational effort.

The first true triple quasar was found in by observations at the W. Keck Observatory Mauna Kea , Hawaii. When astronomers discovered the third member, they confirmed that the sources were separate and not the result of gravitational lensing.

A multiple-image quasar is a quasar whose light undergoes gravitational lensing , resulting in double, triple or quadruple images of the same quasar.

From Wikipedia, the free encyclopedia. Active galactic nucleus containing a supermassive black hole.

This article is about the astronomical object. For other uses, see Quasar disambiguation. It is not to be confused with quasi-star.

Main articles: Redshift , Metric expansion of space , and Universe. Play media. Main articles: Reionization and Chronology of the Universe. Astronomy portal Space portal.

ESO Science Release. Retrieved 4 July Bibcode : Natur. February Accretion Power in Astrophysics Third ed. Bibcode : apa..

Retrieved The Astrophysical Journal. Bibcode : ApJ The Astronomical Journal. Bibcode : AJ Retrieved 6 December Gemini Observatory.

The Astrophysical Journal Letters. Physics Today. Bibcode : PhT Archived from the original on The Publications of the Astronomical Society of the Pacific.

Bibcode : PASP.. Retrieved 3 October European Space Agency. Astrophysical Journal. Physics: Imagination and Reality. Jodrell Bank Observatory. Shields The Discovery Of Quasars".

Publications of the Astronomical Society of the Pacific. Chandrasekhar Greenstein ; M. Schmidt Gray That's weird!

Golden, Colo. Dordrecht: Springer. Bibcode : itaa. Energy Source". October The University of Alabama. Jun 20, Science News. Retrieved 20 November Nature Astronomy.

Bibcode : NatAs Astroparticle physics. Relativity, Gravitation and Cosmology Illustrated ed. Cambridge University Press.

Retrieved 19 June Archived from the original PDF on December 17, Retrieved December 30, Archived from the original PDF on February 2, Retrieved July 1, Barthel Retrieved 26 October Retrieved 4 November Bouwens; et al.

The Nature of Cosmological Ionizing Source". Active Galactic Nuclei. Selection and Optical Properties of a Sample at 0.

ESO Press Release. Retrieved 13 July Naval Observatory Astronomical Applications. BBC News. Monthly Notices of the Royal Astronomical Society.

Bibcode : Sci Annual Review of Astronomy and Astrophysics. Patrick; Heasley, J. Black holes. We have been able to confirm that, indeed, apart from the highly energetic and rapidly evolving quasars, there is another population that evolves slowly.

From Phys. All the nearby gas fell into the black hole, and there wasn't enough left to produce the brilliance quasars are known for.

Besides, another telescope caught a brief glimpse of the quasar in , and it still was shining brightly. This artist's rendering displays the quasar's luminance, which is brighter than a billion suns.

From CNN. Quasar also received a boost because of recent changes in state energy policy. From The Plain Dealer. Quasar sees these plants as a tremendous growth opportunity for its business.

Although a theoretical model is still lacking, finding a connection between those two quantities, as represented by the quasar main sequence, represents an important breakthrough.

Quasars are supermassive black holes that sit at the center of enormous galaxies, accreting matter. Quasars appear to evolve with distance: the farther away one gets, the brighter they are.

The orientation of the quasar's jets is also useful in determining the orientation of the quasar. Translations of quasar in Chinese Traditional.

Need a translator? Translator tool. What is the pronunciation of quasar? Browse quartic BETA. Test your vocabulary with our fun image quizzes.

Image credits. Word of the Day bring something out into the open. Read More. New Words minimony. November 16, To top. English Examples Translations.

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