On their way to Earth, the X-rays from a distant quasar dim as they pass through a cloud of the intergalactic gas. |
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If the quasar results are eventually confirmed, our concepts of space and time are sure to undergo radical transformations. |
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The moving cosmic string would have acted as an additional gravitational lens, affecting both quasar images simultaneously. |
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At those rates, each galaxy could easily have formed the quasar and its black hole power source in just a few hundred million years. |
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Meanwhile, optical measurements suggest the quasar is a billion times more massive than our sun. |
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But others, such as the Milky Way, would still have formed a supermassive black hole despite never being a quasar. |
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In essence the galaxy is eclipsing the quasar, but paradoxically its gravitational lens effect brightens the light received from the latter. |
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The direction of polarization for a quasar is determined by the accretion disk surrounding it. |
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Like a quasar, a black hole or a subatomic particle, the planetarium defies easy comprehension. |
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From this, with the application of a little geometry, the distance to the quasar can be worked out. |
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More recently, astrophysicists explained the intraday variability in luminosity as a scintillation in the interstellar medium rather than rapid quasar rotation. |
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The nanodiamonds would have to be produced near the quasar itself. |
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As light from a quasar travels through space, it passes through clouds of gas that imprint absorption lines onto its spectrum. |
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The energy source that powers a quasar is unknown, although it is suspected to be the intense gravity of a giant black hole. |
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The basic idea here is that the width of the line gives an indication of the speed of the gas close to the quasar. |
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We know that quasar spectra are drastically redshifted during their multibillion-year journey to Earth. |
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In November 2011 the first direct observation of a quasar accretion disk around a supermassive black hole was reported. |
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An international team of astronomers has discovered within the heart of a nearby spiral galaxy a quasar whose light spectrum indicates that it is billions of light years away. |
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The first Canadian images from VSOP emerged from a process that began on May 25, 1997 when telescopes from Australia, South Africa, and Japan simultaneously pointed at a remote quasar 9 billion light-years away. |
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The evidence that is the most difficult to explain away is the quantization of the cosmological redshift and the non-Doppler nature of quasar redshifts. |
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At a certain distance, as measured by the red shift of the light, astronomers can determine the density of hydrogen, based on the absorption of quasar light. |
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Quasar light absorbed by gas in the protogalaxy has revealed the fingerprints of 25 star-forged elements. |
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Quasar spectroscopists around the world were hot on the trail and rapidly produced their own measurements. |
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The state-of-the-art design of the Quasar machines features a platform that is said to be flexible, yet simple to maintain, allowing easy expandability and future upgrades. |
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