| Re: Do magnetars emit audible LW AM radio waves that can be heard on receivers? |
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Group: sci.astro.amateur · Group Profile
Author: RadiumRadium Date: Jul 13, 2007 14:50
> In rec.radio.amateur.space Radium gmail.com> wrote:
>>> Hi:
>> Do magnetars emit AM radio waves below the medium-wave range? If so,
>> how do we detect these waves? Can these waves be heard on the AM
>> radio? If so, what do they sound like?
>
> Frequencies above approximately 100 MHz almost always get through
> the ionization layers.
>
> Frequencies in the approximate range of 10 MHz to 100 MHz sometimes
> get through
>
> Frequencies below approximately 10 MHz almost never get through.
>
> So, if by "the AM radio" you mean a Broadcast Band radio which
> runs from about .5 MHz to 1.2 MHz, not a chance in hell of ever
> hearing anything from off the planet.
>
> Try again.
Okay. But what if this is a supercooled AM radio receiver on a
spaceship orbiting Earth? If I am on a space station like MIR and this
station has a supercooled AM radio 44.1 KHz frequency receiver, will I
hear anything specific of magnetars?
44.1 KHz is the carrier-frequency this hypothetical receiver receives.
I place the frequency of this hypothetical AM radio carrier wave at
44.1 KHz for the same reason CDs use a sample rate of 44.1 KHz
-- it
is the minimum required to prevent aliasing.
AFAIK, space station orbit earth above the ionosphere so the
limitations [preventing long-waves from outer space from reaching the
Earth's surface] do not apply.
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