But he was not feeling so affectionate back then as he attempted to explain the peculiarly irregular timing
of radio pulses from this city - size star: «It was really a lot of pain because the pulsar didn't want to fit any standard models.
If orientated properly, a hot spot above the magnetic pole of the neutron star may whirl in and out of view for observers on Earth, producing a regular train
of radio pulses separated by anything from a few milliseconds to a few seconds.
These after - death planets can be detected because their gravitational pull alters the times of arrival
of radio pulses from the neutron star, or «pulsar», that otherwise pass us by extremely regularly.
Understanding the two phenomena, which are both produced by interactions between charged particles and the planet's magnetic field, may help to explain the variations in the timing
of the radio pulses and to shed light on Saturn's geomagnetic workings.
To add one plus one, the physicists used two of the carbon atoms and zapped them with a series
of radio pulses.
Pulsar timing arrays (PTAs) monitor the arrival times
of radio pulses from numerous pulsars to search for shifts caused by passing long - wavelength gravitational waves.
Not exact matches
Like a burst transmission
of radio waves his entreaties shot out en masse, with Dietl
pulsing with energy as he quickly accelerated to top take - de Blasio - out speed.
Romine says
pulses of radio energy emanated by the smart meters damage the human body.
The shapes
of observed
radio and gamma - ray
pulses are often quite different and some
of the objects show only one type
of pulse or the other.
Katelin Schutz, a theorist at the University
of California, Berkeley, says that clarity could come even faster from stellar beacons called millisecond pulsars, which emit exquisitely regular
pulses of radio waves.
Such tags, costing just a few cents, carry a small, non-powered chip that, when hit by
radio waves from a nearby «reader,» converts some
of the
radio energy into its own
radio pulse in return.
Last week, a scientific paper suggested that the powerful, milliseconds - long
pulses of radio waves from space result when superdense burnt - out stars called neutron stars collide and perish in remote galaxies.
In 1974, astronomers Russell Hulse and Joseph Taylor detected a binary pulsar, a pair
of two dead stars emitting
pulses of radio waves.
True, astronomers still don't know the origins
of these extragalactic milliseconds - long
radio pulses, and until this year fewer than 20 had ever been detected.
The nebula contains a pulsar in its centre which rotates thirty times per second, emitting
pulses of radiation from gamma rays to
radio waves.
Astronomers see them as steady
pulses of radio energy.
When a
radio - frequency electric
pulse is applied to one end
of such a tube (Anderson and Alexeff use fluorescent lamps), the energy from the
pulse ionizes the gas inside to produce a plasma.
A small antenna flips up to stand proud
of the watch face, and transmits
pulses of radio energy.
Paul Marks reports on the European SAVELEC consortium's system to disable the cars
of uncooperative drivers by firing
radio pulses...
These rapidly spinning neutron stars (the cores left behind after a massive star explodes) send out steady
pulses of radio waves.
These rapidly spinning neutron stars flash regular
radio pulses, and in an upcoming issue
of The Astrophysical Journal astronomers say that the timing
of such
pulses could provide a new understanding
of the 4 million solar mass black hole at the center
of the Milky Way.
As
radio telescopes turned a hopeful ear to the stars and optical telescopes kept their eyes peeled for an illuminated alien
pulse, a cavalry
of citizens armed with personal computers sorted through jumbles
of data.
«We could use the individual FRB
pulses of different brightnesses and durations to learn about the size and shape
of asteroids in a belt around a star in another galaxy,» says Emily Petroff at the Netherlands Institute for
Radio Astronomy.
Until recently, we had seen fewer than 20
of these milliseconds - long
pulses of radio waves, and they have been attributed to everything from quasars to aliens.
Your process
of elimination is fascinating: You initially considered that the
pulse could be a satellite,
radio interference, a signal bouncing off a corrugated steel building?
Fast
radio bursts are brief, bright
pulses of radio emission from distant but so far unknown sources, and FRB 121102 is the only one known to repeat: more than 200 high - energy bursts have been observed coming from this source, which is located in a dwarf galaxy about 3 billion light years from Earth.
For years, scientists have been puzzled by the
pulsing intensity
of radio emissions from the ringed planet.
Starting with an ensemble
of spin - down nuclei, the researchers used a specially tuned
radio - frequency
pulse to make a sort
of logic gate: if the electron's spin is down, the nucleus remains unaffected; if the electron's spin is up, the nuclear spin is flipped up as well.
In contrast to the variable
radio waves
of analog broadcasting, digital TV (or DTV) uses electrical
pulses to transmit information precisely and efficiently.
The book's heroine, who works for SETI (Search for Extraterrestrial Intelligence), realizes with a frisson that the prime - number
pulses her
radio telescope is picking up must be generated by some form
of intelligent life.
The high - power radar will illuminate particles in the upper atmosphere with short, high - energy
pulses of radio waves.
The nuclei are then slightly disturbed using
pulses of radio waves.
Among other achievements, his group has used the response
of electrons to measure the electric field
of a laser's ultrashort
pulses and display the waveform, much like displaying a
radio - frequency wave on an oscilloscope.
Coming from the direction
of Sagittarius, the
pulse of radiation was confined to a narrow range
of radio frequencies around 1420 megahertz.
One indicator
of inter-cloud lightning was the distinctive
radio signal
of TIPPs — Trans - Ionospheric
Pulse Pairs.
For the first time, astronomers have pinpointed the location in the sky
of a Fast
Radio Burst (FRB), allowing them to determine the distance and home galaxy of one of these mysterious pulses of radio w
Radio Burst (FRB), allowing them to determine the distance and home galaxy
of one
of these mysterious
pulses of radio w
radio waves.
The more waves we grab, the easier it is to catch all
of the superfast on and off
radio pulses of a pulsar.
These fast
radio bursts (FRBs) are brief, bright
pulses of radio emission from distant but unknown sources.
For the first time, astronomers have pinpointed the location in the sky
of a Fast
Radio Burst, allowing them to determine the distance and home galaxy of one of these mysterious pulses of radio w
Radio Burst, allowing them to determine the distance and home galaxy
of one
of these mysterious
pulses of radio w
radio waves.
Radar
pulses (short bursts
of radio - frequency energy) emitted from a ground - based transmitter are reflected by a meteor's trail.
Although neutron stars were predicted in the 1930s, it was not until the late 1960s that observers accidentally discovered a
radio source emitting weak
pulses, each lasting about 0.3 second with a remarkably constant period
of approximately 1.337 seconds.
That means if an FRB is detected by any
of the world's
radio telescopes, Vandenbroucke and his team can analyze IceCube data for that region
of the sky at the time the
radio pulse was detected.
We know very little about FRBs in general,» explains Justin Vandenbroucke, a University
of Wisconsin — Madison physicist who, with his colleagues, is turning IceCube, the world's most sensitive neutrino telescope, to the task
of helping demystify the powerful
pulses of radio energy generated up to billions
of light - years from Earth.
NANOGrav uses the Galaxy itself to detect gravitational waves with the help
of objects called pulsars — exotic, dead stars that send out
pulses of radio waves with extraordinary regularity.
But the antenna's detection
of the first FRB — and the subsequent confirmed discovery
of nearly two dozen more powerful
radio pulses across the sky by Parkes and other
radio telsescopes — has sent astrophysicists scurrying to find more
of the objects and to explain them.
The
radio pulses followed a numerical pattern, encoding a sort
of «introduction to Earthlings» for aliens.
In the presence
of the powerful magnetic field, the protons are susceptible to excitation by selective
radio frequency
pulses.
And with astronomers now on the lookout for the starnge
pulses of radio energy, Vandenbroucke expects the pace
of discovery to accelerate as the world's
radio telescopes continue their searches and as new
radio interferometers come on line.
In recent
radio surveys at Parkes astronomers looking for new pulsars also found a new type of pulsed object since called Fast Radio Bursts (F
radio surveys at Parkes astronomers looking for new pulsars also found a new type
of pulsed object since called Fast
Radio Bursts (F
Radio Bursts (FRBs).
If this beam
of high - energy radiation is pointed toward Earth, these high - energy
pulses can be detected using
radio and gamma ray telescopes.