25 INSs have been now identified in the optical (O), near-ultraviolet (nUV), or near-infrared (nIR), hereafter UVOIR, including rotation-powered pulsars (RPPs), magnetars, and X-ray-dim INSs (XDINSs), while deep investigations have been carried out for compact central objects (CCOs), Rotating RAdio transients (RRATs), and high-magnetic field radio pulsars (HBRPs).
Rotating a radio transmitter results in a continuously changing frequency at a stationary observer due to the Doppler effect.
He was often back on the screen on Thursday night, as one of a rotating crew of Radio 1 d.j.s who presented "Top of the Pops," the BBC's chart show.
In a conventional radar system, these radio waves are emitted by a rotating antenna that sends out radio pulses and listens out for reflected signals that have bounced off aircraft.
Bell Burnell, while working under Antony Hewish, first observed radio pulsars, or rotating neutron stars.
The plans called for replacing the 156 old sirens, which had mechanical rotating horns and were activated by radio signals, with new units featuring activating systems that can be triggered by cellphone, microwave radio or Internet-based signals.
Our proposed solution is to apply an electric field that rotates at radio frequencies.
Astronomers can spend years analyzing signals from radio telescopes to find a new pulsar, a dense, rapidly rotating star that emits regular blasts of radio waves.
There was a little melody and then aggressive free play, and then some melody again; sometimes it was like rotating the dial between stations on a radio.
Conventional radar uses a rotating antenna to sweep the sky, sending out radio pulses and detecting those which are reflected back from aircraft.
Now, radio astronomers have discovered an elderly, rapidly rotating star known as a pulsar in the vicinity of the black hole, called Sagittarius A, that is providing some clues, reported Nature.
