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Topic: Millisecond Pulsars

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	Millisecond pulsar - Wikipedia, the free encyclopedia
		A millisecond pulsar (MSP), often referred to as "recycled pulsar", is a pulsar with a rotational period in the range of about 1-10 milliseconds.
		The first millisecond pulsar, PSR B1937+21, was discovered in 1982 by Backer et al.
		Pulsar PSR J1748-2446ad, discovered in 2005, is as of 2006 the fastest spinning neutron star currently known, spinning 716 times a second [2], [3].
	en.wikipedia.org /wiki/Millisecond_pulsar (508 words)

	PULSAR (via CobWeb/3.1 planetlab2.cs.unc.edu) (Site not responding. Last check: 2007-10-13)
		Typical pulse periods range from 0.25 to 2 seconds; pulsars with periods in the range of 1 to 10 milliseconds are called millisecond pulsars.
		Like the Earth, the pulsar is surrounded by a magnetosphere, a region in which electrons and other particles are accelerated by the magnetic field.
		However, the magnetic field of the pulsar is much stronger than the Earth's and the electrons move at velocities close to the speed of light, emitting synchrotron radiation in a narrow beam along the direction of the magnetic poles.
	astrosun.tn.cornell.edu.cob-web.org:8888 /courses/astro201/pulsar.htm (221 words)

	MILLISECOND PULSARS (Site not responding. Last check: 2007-10-13)
		As the name suggestions, millisecond pulsars have pulse periods that are in the range from one to ten milliseconds.
		The first millisecond pulsar designated PSR 1937+21 (by its coordinates), was discovered by Backer and his colleagues using the Arecibo telescope in 1982.
		Until the discovery of PSR 1937+21, the fastest known pulsar was the 33 ms pulsar associated with the Crab Nebula.
	astrosun2.astro.cornell.edu /academics/courses/astro201/pulsar_ms.htm (241 words)

	Universe Today - How Millisecond Pulsars Spin So Fast
		This large sample is a bonanza for astronomers seeking to test theories for the origin of millisecond pulsars, and increases the chances that they will find a critical transitional object such 47 Tuc W. 47 Tuc W stands out from the crowd because it produces more high-energy X-rays than the others.
		In theory, the first step toward producing a millisecond pulsar is the formation of a neutron star when a massive star goes supernova.
		It links a millisecond pulsar with many of the properties of an X-ray binary, to J1808, an X-ray binary that behaves in many ways like a millisecond pulsar, thus providing a strong chain of evidence to support the theory.
	www.universetoday.com /am/publish/origin_of_millisecond_pulsars_47tucw.html?2072005 (819 words)

	EVOLUTION OF A MILLISECOND PULSAR (via CobWeb/3.1 planetlab2.cs.unc.edu) (Site not responding. Last check: 2007-10-13)
		A pulsar is a rapidly rotating highly magnetized neutron star, formed in the supernova explosion of a massive star.
		It is believed that future millisecond pulsars enter the "graveyard" as members of binary systems.
		Once "spun-up", the pulsar is "born again" as a millisecond pulsar.
	astrosun.tn.cornell.edu.cob-web.org:8888 /courses/astro201/pulsar_graph.htm (197 words)

	Pulsar - Wikipedia, the free encyclopedia (via CobWeb/3.1 planetlab2.cs.unc.edu) (Site not responding. Last check: 2007-10-13)
		Pulsars also exhibit a so-called lighthouse effect, which occurs when the light and other radiation from a pulsar are only seen at specific intervals and not all of the time.
		The suggestion that pulsars were rotating neutron stars was put forth independently by Thomas Gold and Franco Pacini in 1968, and was soon proven beyond doubt by the discovery of a pulsar with a very short 33-millisecond pulse period in the Crab nebula.
		For example, X-ray pulsars are probably old rotation-powered pulsars that have already lost most of their energy, and have only become visible again after their binary companions expanded and began transferring matter on to the neutron star.
	en.wikipedia.org.cob-web.org:8888 /wiki/Pulsar (1682 words)

	Graphics: Making a Millisecond Pulsar (via CobWeb/3.1 planetlab2.cs.unc.edu) (Site not responding. Last check: 2007-10-13)
		For several tens of millions of years, that neutron star is likely active as a radio pulsar.
		Once accretion ends, the neutron star is spinning very rapidly and emerges as a millisecond radio pulsar.
		This process is known as "recycling." Strong "winds" from the pulsar slowly erode away the companion star, which can eclipse the pulsar's radio emission.
	www.nrao.edu.cob-web.org:8888 /pr/2006/mspulsar/mspulsar.graphics.shtml (298 words)

	BEACONS IN SPACE: A Search for Millisecond Pulsars (via CobWeb/3.1 planetlab2.cs.unc.edu) (Site not responding. Last check: 2007-10-13)
		With the CRAY C90, Taylor's group can sift the data they collect at Arecibo with far greater sensitivity and efficiency than was possible 20 years ago, and this computing power is yielding a significant payoff in the discovery of pulsars.
		Although that had a period of 59 milliseconds, it was the first of the genre.
		Only about 50 millisecond pulsars are known, and 30 of these are in distant globular star clusters, where other stars' gravitational fields can interfere with precision measurements of the pulsar.
	www.psc.edu.cob-web.org:8888 /science/Taylor/Taylor.html (401 words)

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