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  1. #1
    Babak Sehari's Avatar
    Babak Sehari Guest

    Default Need recent data for red shift vs. distance for stars



    Hello,

    I am looking for the recent & reliable red shift vs. star distance data for
    as many stars as possible. If you know a good source, please point me to
    it.

    Thanks,
    Babak



  2. #2
    Odysseus's Avatar
    Odysseus Guest

    Default Need recent data for red shift vs. distance for stars

    Babak Sehari wrote:

    Several references (not very recent, but presumably quite reliable)
    are cited here:

    <http://seds.lpl.arizona.edu/~spider/spider/Misc/star_cats.html#rv>.

    --
    Odysseus

  3. #3
    Bill Nunnelee's Avatar
    Bill Nunnelee Guest

    Default Need recent data for red shift vs. distance for stars

    Stars in our own galaxy are gravitationally bound to it and display roughly
    equal numbers of red shifts and blue shifts. If it's cosmological redshifts
    you're after (and that's the only way a distance versus red shift comparison
    makes sense), you need to search for data on galaxies.


    "Babak Sehari" <sehari@comcast.net> wrote in message
    news:TwWdnW3Y7t_wTKOiXTWJiQ@comcast.com...
    for



  4. #4
    Odysseus's Avatar
    Odysseus Guest

    Default Need recent data for red shift vs. distance for stars

    Bill Nunnelee wrote:
    True, but we have few, if any, means of corroborating the galactic
    distances derived from red-shifts. Perhaps a catalogue of cepheids in
    our own and nearby galaxies would make a good 'compromise', for example

    <http://ddo.astro.utoronto.ca/cepheids.html> and

    <http://dogwood.physics.mcmaster.ca/Cepheid//HomePage.html>.

    --
    Odysseus

  5. #5
    eyelessgame's Avatar
    eyelessgame Guest

    Default Need recent data for red shift vs. distance for stars

    "Babak Sehari" <sehari@comcast.net> wrote in message news:<77-cnUwM4oj2FtyiXTWJkA@comcast.com>...

    You're just a /tad/ premature in coming up with "another theory to
    explain the red shift" if you are so uninformed as not even to have
    the redshift data available to you. Exactly how much of this have you
    studied?

    With your alternative theory, be sure to explain the CMBR, the
    cosmological constant problem, the recent speedup of the universe, the
    curvature of the universe, the match of redshift to cepheids, the
    younger population stars in higher-redshift galaxies, and about a
    dozen other lines of evidence for the current consensus view. You've
    got a bit more to explain than just redshift. Trying to change one
    law of physics is like trying to eat one peanut.

    Best of luck, thouhg.

    eyelessgame

  6. #6
    Babak Sehari's Avatar
    Babak Sehari Guest

    Default Need recent data for red shift vs. distance for stars

    Ok. My theory basically is that there should be another explanation to the
    red shift than doppler shift. My theory
    suggest that light, like any other particle, is radio-active. So a phton of
    light has its energy given:

    E = h <v>

    Where v (nu) is the frequency, and it's momentum given as:

    p = h/<lambda>

    Where lambda is wave length. Now if a light be radio active and instead of
    H atom or nutron emits another photon
    we would have:

    E = h <v1> = h <v2> + h <v3>

    The reason that I put < > is that the average frequency and not a sharp
    frequency, because of uncertainty principle.
    Now, let's assume that v3 is balck body radiation associated with 4 Deg K
    that is coming from all corners of universe.
    Now if we crunch the numbers and try to find out what is the half life of
    the light. That is light coming from closer objects
    may have gone through a few radio active reaction and the light that is
    coming from far. So in general we have:

    E=h<v1-n.v3> + n h <v3>

    This could mean that the reason that the far objects have larger red shift
    than closer objects is because the light coming from
    them has gone through many radio active like reaction. Also this could
    explain why there is a background 4 Deg K radioation.
    Further more, it suggests that 4 Deg K radiation pattern may be a
    fundamental particle (photon) in our universe.

    The problem with doppler shift is that it asumes light will not change
    indefinately. This of course is the case in earth, solar system
    or our galactical neighbourhood. But we should not assume this is the case
    for over 1000s of light years distance (or time) frame.

    Looking at it from classical point of view: Using Maxwell's euation we can
    drive the speed of light to be constant and a function
    of u and e of free space. It is widely assumed that u and e are constant
    all over universe. We know u and e could become tanser in
    say ferride materials, so it is possible that some where far from our
    galaxy u and e are not constats and have tenser like
    property. Or u and e have very small non axial component that are many
    order of magnitude smaller than the axial componant. This
    means the light over large distances could go through rotation and/or
    frequency despersion. Further more we have not proven that
    u and e of free space are not time dependent.

    So there are these and many other questions that make me want to examine
    "the red-shift caused by doppler shift effect" religion
    scientifically.

    Regards,
    Babak Sehari

    Ps. Please feel free to point me to a prove why u and e are not a function
    of time or 100,000s light year from earth space have the
    same property as around here, or photon's half life is indefinate. Then I
    accept your "the red-shift caused by doppler shift effect"
    religion.

    "eyelessgame" <aamp@oro.net> wrote in message
    news:e707421e.0308192243.7d5a65d8@posting.google.c om...
    news:<77-cnUwM4oj2FtyiXTWJkA@comcast.com>...
    question.



  7. #7
    eyelessgame's Avatar
    eyelessgame Guest

    Default Need recent data for red shift vs. distance for stars

    "Babak Sehari" <sehari@comcast.net> wrote in message news:<HbOdnYSOHOgOAdiiU-KYvw@comcast.com>...

    OK.


    Where's your data suggesting that this is the case? Show the
    published papers -- or present for publication any papers -- that have
    demonstrated the radioactivity of photons, and we'll have a good place
    to start.

    [snip rest till we hear from him here]

    eyelessgame

 

 

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