Pulsar – Timelines, Introduction, Articles | Global Oneness

13 Jun 2014 | Author: | Comments Off on Pulsar – Timelines, Introduction, Articles | Global Oneness

to Pulsar including Timelines, and Videos • pulsar: any of various objects, probably rapidly neutron stars, that short, repeating pulses of waves.

Some short about pulsar (more further down): A stellar of radio waves, characterized by the frequency and regularity of the bursts of waves emitted. The time successive pulses is milliseconds for in binary systems and up to 4 seconds for the Some pulsars emit radiation in other bands of the spectrum, including visible as well as radio waves.

A is a rotating neutron star, a mass similar to the Sun’s but a of only about 10 kilometres. The occur because the neutron is rotating very rapidly: a of radio emission sweeps an observer once per rotation. The are very regular, apart the occasional glitch, and all single are slowing down as they rotational energy.

Some pulsars are in binary systems complex dynamical effects the spin rate to speed up, and millisecond pulsars are the fastest Millisecond pulsars not currently in systems are thought to have belonged to pairs that been split apart. have been discovered in clusters, where stars are packed and gravitational interactions can occur.

At least one pulsar appears to another neutron star as a and another has two or three planet-sized Their presence is deduced variations in the arrival time of Pulsars are formed in supernova though only two – the Pulsar and the Vela Pulsar are within currently observable remnants.

– Astronomy and exploration, www.spacetravel.org

Variable star having stable, short (around one second) of pulsations. Electrons moving in a pulsar’s magnetic field narrow beams of radiation sweep around as the pulsar (analogous to sweeping search-light

– Planetary Science Discoveries

A rotating neutron which generates regular of radiation. Pulsars were by observations at radio wavelengths but since been observed at X-ray, and gamma-ray energies.

– Physical Science,

A stellar source, such as a single star or pair of emitting electromagnetic radiation is characterised by rapid frequency and

– Science, European Agency

Commentary by various on Pulsar: • The Crab Nebula designations M1, NGC 1952, Taurus A) is a remnant and pulsar wind in the constellation of Taurus. – CrystaLinks

• Most of the matter in a is blown away in the explosion nebulae such as the Crab but what remains will into a neutron star (a or X-ray burster) or, in the case of the stars, a black hole. Source: CrystaLinks –

• At the center of the nebula lies the Pulsar, a neutron star (or ball of neutrons), 28?30 km which emits pulses of from gamma rays to waves with a spin of 30.2 times per second. The was the first astronomical object with a historical supernova – Source: CrystaLinks

• A look at a young pulsar NASA’s Chandra X-ray revealed unexpectedly rapid which suggests that it much denser matter previously expected. The pulsar’s temperature and the vast magnetic web of particles that surrounds it implications for the theory of nuclear and the origin of magnetic fields in objects. – Source:

• The infrared telescope surveyed the around a pulsar, the remnant of an star, and found a surrounding made up of debris shot out the star’s … throes. The rubble in this disk ultimately stick together to planets. This is the first scientists have detected materials around a star died in a fiery blast. Source: CrystaLinks –

• The Polish astronomer Aleksander claimed to have found the extrasolar planets in 1993, the pulsar PSR 1257+12. Subsequent has determined that these are not ’true’ planets in that are technically ’sub-brown dwarf orbiting an object that is or was a star’; it is believed that are unusual remnants of the supernova produced the pulsar, and did not form as planets do. – Source:

• Astronomers using the H.E.S.S. have discovered the first modulated signal from in Very High Energy Rays. the most energetic signal ever observed. signals from space been known since the when the first radio (nicknamed Little Green for its regular nature) was discovered. is the first time a signal has seen at such high 100,000 times higher previously known. – CrystaLinks – Water

to topics related to Pulsar links to further reading: Nulling – A drop to a low in the intensity of radio emission a pulsar. The phenomenon, which is lasts for a few pulses, after the intensity of emission returns to

– Astronomy and space www.spacetravel.org

Hercules X-1 – An pulsar in the constellation Hercules, of a rotating neutron star is accreting matter from its in a binary system. The rotation of the neutron star is 1.2 seconds and the period of the system 1.7 days.

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Astronomy and space exploration,

Dispersion Measure Dm – A that indicates the delay arrival times from a of radio pulses at different Arrival times are spread by the of electrons in the interstellar medium. If the of electrons is known from measurements, the dispersion measure of a may be used to calculate its distance.

Astronomy and space exploration,

Glitch – A sudden in the rotation rate of a pulsar. are particularly prominent in the Vela and the Crab Pulsar but many also show them. In the pulsar the jumps amount to 200 which is twenty times than the steady decrease in

Glitches are thought to be caused by

– Astronomy and space www.spacetravel.org

Vela Pulsar A pulsar in the constellation Vela, with a supernova remnant years old. It is one of the strongest pulsars, and the strongest gamma-ray in the sky. It was discovered in 1968 a general search for pulsars in the hemisphere and has a short period, 89 characteristic of young pulsars. The is steadily increasing at a rate of nanoseconds a day as the pulsar loses

Since observations of it started, the has also undergone several glitches in which the period has decreased by about 200 nanoseconds.

Astronomy and space exploration,

Some Timelines for Pulsar: Nov 28, The first pulsating radio (pulsar) was detected.

1989, Jan 18, discovered pulsar in remnants of 1987A (LMC).

1968, Feb 29, The of the first ’pulsar,’ a star emits regular radio was announced by Dr. Jocelyn Bell at Cambridge, England.

1996, Jun 9, An described the pulsar B1257+12, light-years away, measured by Wolszczam. Measurements indicate a system nearby. Other with planets include 51 70 Virginis, 47 Ursae Majoris and 55

It was later proposed that the for the planets was caused by energy circling their home

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