pulsar

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Related to Pulsars: Quasars

pul·sar

 (pŭl′sär′)
n.
Any of several celestial objects emitting periodic, short, intense bursts of radio, x-ray, or visible electromagnetic radiation, generally believed to be quickly rotating neutron stars.

[From puls(ating st)ar (influenced by quasar).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

pulsar

(ˈpʌlˌsɑː)
n
(Astronomy) any of a number of very small extremely dense objects first observed in 1967, which rotate very rapidly and emit very regular pulses of polarized radiation, esp radio waves. They are thought to be neutron stars formed following supernova explosions
[C20: from puls(ating st)ar, on the model of quasar]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

pul•sar

(ˈpʌl sɑr)

n.
any of several hundred known celestial objects, generally believed to be rapidly rotating neutron stars, that emit pulses of radiation, esp. radio waves, with a high degree of regularity.
[1968; puls(ating st)ar, on the model of quasar]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

pul·sar

(pŭl′sär′)
A spinning neutron star that emits radiation, usually radio waves, in very short and very regular pulses. Because a pulsar's magnetic poles do not align with the poles of its axis, its beams of radiation sweep around like the beacon of a lighthouse.
Did You Know? When a very large star goes off like a giant bomb in an explosion called a supernova, the core of the star collapses into either a neutron star or a black hole. In 1054, one of these explosions could be seen in the sky during both day and night for 23 days. Chinese astronomers took note of this "guest star," and rock paintings and pottery found in Arizona and New Mexico suggest that Native Americans recorded it, too. In the 18th century, astronomers discovered in the constellation Taurus the leftovers that had been blown away by this explosion, the bright cloud called the Crab Nebula. In the late 1960s, 900 years after the supernova, astronomers found a source of rapidly pulsing radio waves, with 30 flashes per second, near the center of this nebula. The source of this pulsating radiation is an object that was named a pulsar. We now know that a pulsar is a rapidly rotating neutron star whose radiation is emitted like a spinning flashlight. Over 700 pulsars have now been detected, with rates of rotation ranging from once every 4 seconds to more than 600 times per second.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

pulsar

A rapidly rotating neutron star that gives off regular bursts of radio waves.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pulsar - a degenerate neutron star; small and extremely dense; rotates very fast and emits regular pulses of polarized radiation
neutron star - a star that has collapsed under its own gravity; it is composed of neutrons
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations

pulsar

[ˈpʌlsɑːʳ] Npulsar m
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

pulsar

nPulsar m
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

pulsar

[ˈpʌlsəʳ] npulsar m or f inv
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
References in periodicals archive ?
When the album was originally published, little was known about the pulsars. The changes in the brightness of the radio flashes were thought to be chaotic and random.
Last November, the Neutron Star Interior Composition Explorer spent a day and a half looking at a handful of pulsars " rapidly spinning stellar remnants that give off beams of powerful radiation as they rotate.
Instead of the dust lanes and star-filled patches of the visible-light Milky Way, Fermi's whole-sky map features a thin, bright stripe of gamma rays emanating from the galactic plane, most of it coming from interstellar gas, pulsars, and stellar-mass black holes.
X-ray pulsars are rapidly rotating neutron stars which could emit X-ray signals periodically, stably, and uniquely [1].
Pulsars [1], which are recognized as rotating neutron stars, can emit regular signals from the radio to the high energy band [2].
The measurement comes from analyzing the only known pair of gravitationally bound pulsars, dense cores of dead stars that emit intense beams of radio waves with the regularity of a nearly perfect clock.
The X-ray brightness of J0617 and its X-ray spectrum, or the amount of X-rays at different wavelengths, are consistent with the profiles from known pulsars. The spectrum and shape of the diffuse, or spread out, X-ray emission surrounding J0617 and extending well beyond the ring also match with expectations for a wind flowing from a pulsar.
Auto Business News-July 15, 2015--Bajaj Motorcycles commences export of new Pulsars to international market
It is generally accepted that pulsars lose energy through magnetic dipole radiation and that the rotation rate will decrease over time.
After these planets were observed by Wolszczan and Frail, in the following years scientists could observe other planets or minor bodies orbiting pulsars. Another additional planet of lower mass orbiting the same pulsar was later discovered.
With the pulsar's spin and orbital characteristics in hand, a team led by Alessandro Papitto of the Institute of Space Sciences in Barcelona, Spain, compared them to parameters for known radio pulsars in M28 and found a perfect match with PSR J1824-2452I.