Pulsar Characteristic Age
When astronomers measure the period, or spin-rate of the rotation of a pulsar, they find that pulsars are slowing down, usually at a very consistent rate.
Pulsar
Related Category: Astronomy: General
in astronomy, a neutron star that emits brief, sharp pulses of energy instead of the steady radiation associated with other natural sources.
pulsar
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Pulsars were discovered during a fruitful time in the history of radio astronomy.
Pulsars are thought to be rapidly spinning neutron stars, extremely dense stars composed almost entirely of neutrons and having a diameter of only 20 km (12 miles) or less.
Pulsars were first discovered by Jocelyn Bell, a graduate student, in 1967 in the radio region of the electromagnetic spectrum. At first, it was thought that such regular, rapid signals could not be natural in origin.
A pulsar in the Lonka Cluster A binary pulsar, viewed on the viewscreen of the USS Voyager A pulsar is a type of star, a rapidly rotating neutron star that sends out streams of electrons at nearly the speed of light along their magnetic poles.
Definition: pulsar: (PULsating stAR) A rotating neutron star which generates regular pulses of radiation. Pulsars were discovered by observations at radio wavelengths but have since been observed at optical, X-ray, and gamma-ray energies.
Pulsar
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Pulsars are highly magnetized rotating neutron stars which emit a beam of detectable electromagnetic radiation in the form of radio waves. Their periods range from 1.5 ms to 8.5 s.
X-ray pulsar
X-ray pulsars or accretion-powered pulsars are a type of astronomical objects which are X-ray sources with a strict periodic variations in intensity.
Binary pulsars and general relativity
Many stars are members of binary systems, in which two stars orbit around each other with periods of some days or years. A number of binary systems are known in which one of the stars is a neutron star.
Binary pulsar
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Pulsars are spinning neutron stars, which are the remains of a massive star that has exploded as a supernova. As they spin, beams of radio waves emanating flash in our direction, causing them to appear to pulse, hence their name.
Pulsars
A pulsar is the same object as a neutron star, but with one added feature.
anomalous X-ray pulsar (AXP)
A type of X-ray pulsar with a very long axial rotation period (for a pulsar), of 6 to 12 seconds, combined with a very powerful X-ray emission that cannot be explained by such a low spin rate.
Who discovered the first pulsar?
Answer:
Jocelyn Bell discovered the first pulsar in 1967. At the time, she was a graduate student at Cambridge University. She was working with her advisor, Dr.
Pulsars are objects that appear to emit regular bursts of electromagnetic energy. The accepted explanation for pulsars is the lighthouse model, in which a rotating neutron star sends a beam of energy into space.
Pulsars
In the late 1960's astronomers discovered radio sources that pulsated very regularly with periods of just fractions of a second to a few seconds.
pulsar Object that emits radiation in the form of rapid pulses with a characteristic pulse period and duration.
pulsar
a rapidly rotating neutron star that bathes Earth in regular pulses of electromagnetic radiation
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Pulsars and Neutron Stars
A number of distinct sources of radio pulses, referred to as pulsars, have been discovered with radio telescopes. Typical pulsation periods of the pulsars are near 1 sec.
PULSAR - Extra-terrestrial source of radiation that has a regular periodicity, usually in the form of short bursts of radio emission.
pulsar
A star that emits radiation in regular pulses of energy. A pulsar is a rapidly rotating neutron star that is oriented so that the pulses of energy are aligned with the Earth.
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pulsar
A rotating neutron star whose light appears to pulse. These pulses are the result of beams of radiation sweeping through the direction to the earth, much like a lighthouse beacon.
Pulsar
A source of short, precisely times radio bursts believed to be spinning neutron stars.
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Pulsar: Variable radio star having stable, very short (around one second) periods of pulsations.
Pulsar
a spinning neutron star (burnt-out star) that emits energy along its gravitational axis. This energy is received as pulses as the star rotates.
Pulsar. A neutron star that is rapidly rotating and emitting radio waves.
Pulsar - A rotating neutron star with beams of radiation emerging from its magnetic poles. When the beams sweep past the Earth, we see "pulses" of radiation ...
Pulsar. See neutron star
Pythagoras, theorem of -- A proved assertion in geometry, that in a right-angled triangle which has sides of length (a, b, c), if c is the long side facing the right angle, then a2 + b2 = c2 ...
Pulsar
(a) A fast-spinning neutron star that emits radiation toward Earth every-time it rotates.
(b) Neutron stars that spin rapidly and have strong magnetic fields, which produce electromagnetic radiation. (See neutron star.) ...
Pulsars are highly magnetized, rotating neutron stars that emit a beam of electromagnetic radiation. The observed periods of their pulses range from 1.4 milliseconds to 8.5 seconds....
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PULSAR
A pulsar is a rapidly spinning neutron star that emits energy in pulses. Pulsars were discovered in 1967 by S. Jocelyn Bell Burnell (1943- ), who was a Cambridge University astronomy graduate student at the time.
Pulsars :
rotating magnetized neutron stars
conservation of angular momentum ---
rapid spin
lighthouse model
Crab nebula powered by pulsar (synchrotron)
slowing down (young pulsars spin faster than old) ...
Pulsars that radiate in the X-ray region of the spectrum. Best verified examples are Her X-1 and Cen X-3.
Pulsar
A neutron star that emits rapid and periodic pulses of radiation.
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Pulsar stands for pulsating radio source. A pulsar produces two powerful beams of radiation. These beams arise due to the intense magnetic field possessed by neutron stars, ∼ 108 T.
pulsar - (n.)
A rapidly rotating object, now known to be a neutron star, an extremely dense collapsed star where the electrons have been forced into the protons. The object is thus made up mainly of neutrons and a few kilometers in diameter.
The pulsars with the shortest known periods are known as the millisecond pulsars. These pulsars have periods as short as between one and two milliseconds and their periods are very constant.
When pulsars were first discovered in 1967 their radio waves were so regular that astronomers weren't quite sure whether they were picking up some sort of signal from intelligent life elsewhere in the galaxy. That is why pulsars were dubbed LGMs.
The first pulsar, PSR B1919+21, was discovered in Vulpecula in Cambridge in 1967. It was spotted by the radio astronomer and Nobel Prize laureate Antony Hewish and astrophysicist Jocelyn Bell Burnell.
binary pulsar (Spacetime Wrinkles Glossary) A binary star system (a system where two stars orbit each other), where one of the two is a pulsar.
What exactly are pulsars? Believe it or not, at first they did think the signals were from extraterrestrials due to the very precise nature of the pulses, ...
Neutron Stars and Pulsars
Black Holes
Quasars
Exploding and Colliding Galaxies ...
[6.3] MILLISECOND PULSARS
[6.4] MAGNETARS & SOFT GAMMA-RAY REPEATERS
[6.5] BLACK HOLES DISCOVERED?
When signals from pulsars were discovered in 1960s, we thought they came from some other civilizations. Later on, we knew that this is not the case. But this raises another question: The rotational period could be as fast as 0.
The radiating lines at left represent the positions of 14 pulsars, compact, ultra-dense rapidly spinning stars.
1967 - Jocelyn Bell and Anthony Hewish discover radio pulses from a pulsar,
1967 - J.R. Harries, Ken McCracken, R.J. Francey, and A.G. Fenton discover the first X-ray transient (Cen X-2), ...
Pulsars (Check the study guide for this lesson)
Most neutron stars spin very rapidly and as they do they beam large amounts of energy in a pulsating manner. I'll teach you about these incredible "astro tickers".
Another type of stellar object was first discovered in this constellation: pulsars. In 1967 astronomers (Antony Hewish and Jocelyn Bell) in Cambridge discovered completely regular signals from a certain direction of space.
From a distance, the star looks like a lighthouse: if the Earth is in the way, we get a blast of radiation, and from here see the neutron star as a "pulsar. " Young pulsars emit from low-energy radio waves through high- energy X-rays and gamma rays.
The newfound planet orbits the pulsar so closely the entire system would fit inside the sun.
Susan Jocelyn Bell Burnell (1943- ) is an astronomer who discovered the existence of pulsars in 1967, while she was a graduate student at Cambridge University. A pulsar is a rapidly spinning neutron star that emits energy in pulses.
In 1991 radio astronomers detected the first extrasolar planets orbiting none other than a dying pulsar star. This star was left over from a supernova explosion in the constellation Virgo.
All that remains of the original star, which exploded as a supernova, is a pulsar (bright white dot, left of center) -- a ball of matter that is several times as massive as the Sun but the size of a city.
Este tipo de radiación se le llama pulsar. Los pulsares son detectados por su rápida repetición de señales de radio, lanzados por las partículas cargadas hacia el campo magnético de la Tierra.
These planets are believed to have formed after the supernova that produced the pulsar.
Fermi is also finding new pulsars. Pulsars are collapsed stars that emit repeated pulses of energy. Fermi finds pulsars that can only be found by measuring gamma rays.
The beams rotate with the giant planet every 9 hours and 55 minutes making Jupiter something like a slow-turning pulsar.
Even professional astronomers, after long nights observing distant galaxies, quasars, and pulsars will occasionally turn their gaze upon our sister world, the Moon.
 See also: Star, Energy, Light, Earth, Universe
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