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Carbon dust mistaken for Dark Energy all this time?

  1. Mar 2, 2008 #1

    SF

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    http://www.ciw.edu/news/dirty_space_and_supernovae

     
  2. jcsd
  3. Mar 2, 2008 #2

    jal

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    There is a lot of “buzz” and “hype” in the blogs and new reports being generated by … quote, “Scientists think a thin interstellar haze of graphite whiskers spewed from stars and supernovae would affect how different wavelengths of light pass through space.”
    Because, quote, “In the study, published in today's issue of Science ScienceDaily (Feb. 29, 2008), Andrew Steele and Marc Fries of the Carnegie Institution's Geophysical Laboratory report the discovery of an unusual new form of carbon in minerals within meteorites dating from the formation of the solar system.”
    http://www.sciencedaily.com/releases/2008/02/080228143538.htm
    Graphite Whiskers, Rather Than Dark Energy, Could Explain Dimness Of Stellar Explosions
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    Where to look to find out more?
    I’ll leave the comment to others.
    http://arxiv.org/find/astro-ph/1/au:+Dwek_E/0/1/0/all/0/1
    Showing results 1 through 25 (of 42 total) for au:Dwek_E
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    http://search.arxiv.org:8081/paper....23nN-1719605143&qs=Graphite+Whiskers&byDate=1
    On the source of the late-time infrared luminosity of SN 1998S and other type II supernovae
    Authors: M. Pozzo (1), W.P.S. Meikle (1), A. Fassia (1), T. Geballe (2), P. Lundqvist (3), N.N. Chugai (4), J. Sollerman (3) ((1) Imperial College London, London, UK, (2) Gemini Observatory, Hawaii, USA, (3) Stockholm Observatory, Stockholm, Sweden, (4) Insitute of Astronomy, Moscow, Russia)
    (Submitted on 27 Apr 2004)
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    http://arxiv.org/find/astro-ph/1/au:+Li_A/0/1/0/all/0/1
    Showing results 1 through 25 (of 52 total) for au:Li_A
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    http://arxiv.org/find/astro-ph/1/au:+Aguirre_A/0/1/0/all/0/1
    Showing results 1 through 25 (of 35 total) for au:Aguirre_A
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    http://arxiv.org/abs/astro-ph/0101551v1
    Small Scale Fluctuations of the Microwave Background in the Quasi-Steady State Cosmology
    Authors: J.V. Narlikar, R.G. Vishwakarma, G. Burbidge, F. Hoyle
    (Submitted on 31 Jan 2001)
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    http://adsabs.harvard.edu/abs/1979Ap&SS..66..173R
    Absorption effects of intergalactic natural graphite whiskers on observations at microwave and radio frequencies
    Authors: Rana, N. C.

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    http://arxiv.org/abs/0801.2965
    Cosmology and Cosmogony in a Cyclic Universe
    Authors: Jayant V. Narlikar, Geoffrey Burbidge, R.G. Vishwakarma
    (Submitted on 18 Jan 2008)
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    http://www.journals.uchicago.edu/doi/abs/10.1086/345928
    Inhomogeneities in the Microwave Background Radiation Interpreted within the Framework of the Quasi–Steady State Cosmology
    2003. The American Astronomical Society
    Received 2002 February 27; accepted 2002 November 4
    J. V. Narlikar, R. G. Vishwakarma, Amir Hajian, Tarun Souradeep, G. Burbidge, and
    F. Hoyle
    ----------------
     
  4. Mar 2, 2008 #3

    Wallace

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    Science Advisor

    I haven't looked at this study in detail yet but I'll have a look. I can comment about dust and dark energy in general though. It has been long established now that it is extremely unlikely for any kind of dust to spoof dark energy. The abstract notes that these carbon fingers would absorb in the Infra-Red. This is indeed where important measures of the flux from supernovae are measured. However, if this was the case, you would expect to see a change in the relative intensities of the continuum radiation across the whole spectrum. Careful measurements have shown that this does not occur. Any dust that could spoof dark energy would have to be 'grey', in the sense that it absorbed light equally at all wavelengths. No known 'dust' can do this.

    The other issue is that to fit the SN results by grey dust the density of the dust in the Universe has to evolve in a very odd way, there must be more not less dust in the past than there is today.
     
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