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Gravitational Wavelengths

  1. Mar 3, 2008 #1
    Contemplating the propogation of Gravitation at roughly c in the form of a wave, has anyone ever attempted to quantify lambda, or the wavelength, in terms of meters or some other unit? Is there a gravitational spectrum, like there is an electromagnetic spectrum? And finally, could there be any possibility of gravitational lambda shift, when objects move past each other rapidly, thinking in terms of the recently publicized Pioneer and Flyby Anomalies?
     
  2. jcsd
  3. Mar 3, 2008 #2

    Wallace

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    There is expected to be a spectrum of primordial gravitational waves with a particular signature the is the same everywhere in the sky, rather like the cosmic microwave background. On top of this it is expected that there will be occasional transient point sources of gravitational waves from colliding black holes and similar events.

    I'm not sure what you are referring to with regards to the Pioneer and Flyby anomalies? I can't think of anyway in which they are related to gravity waves? Can you clarify what you meant?
     
  4. Mar 4, 2008 #3
    NASA has looked at the data for six probes (Pioneer, Gallileo, NEAR, Rosetta, Cassini, MESSENGER) with rapid velocities from and toward the sun and there are anomalies with respect to unexplained acceleration towards the sun. ( See http://www.space.com/scienceastronomy/080229-spacecraft-anomaly.html ) I was wondering if acceleration in alignment with gravitational waves would cause come kind of "gravitational doppler effect" but this would depend on the "wavelength" of gravitational waves from the sun......
     
  5. Mar 4, 2008 #4

    Wallace

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    The gravitational waves produced by the solar system are ridiculously small. If they were big enough to cause the Pioneer anomaly then gravitational waves from supernovae in our galaxy would tear the solar system apart (maybe not but they would be very obvious). It's not so much wavelength as amplitude, they just aren't strong enough to explain the Pioneer anomaly.
     
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