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3D Map To Compute Matter Distribution In Universe - SDSS Aftermath

Discussion in 'Engineering & Technology News' started by Farjand, Jan 12, 2012.

  1. Farjand

    Farjand Rookie

    Engineering Discipline:
    It appears that the Large Hadron Collider is not the only project which is attempting to find about the origin and trying to uncover mystery of Universe. Laboratories and space agencies across the globe are doing their bit for this cause. On the same lines but on different parameter and ranges, Sloan Digital Sky Survey (SDSS) has taken a step ahead by using the data from surveying a vast volume of night sky.

    SDSS surveyed 14,000 square degrees of the sky and delivered over a trillion pixels of imaging data. This image shows over a million luminous galaxies at redshifts indicating times when the universe was between seven and eleven billion years old.

    When talking about origin of Universe, we point towards the Big Bang theory. However the exact reason why matter is clustered in some areas while other areas have vacuum is still unknown. Scientists associated with SDSS have been working since a decade, to gather information about the way matter is spread across space. Now these researchers have put the SDSS data to find out the reason.

    Berkeley lab scientists and SDSS scientists have tried to construct a colored 3D map which is crucial in calculating the amount of matter that is piled together. Scientists, while arranging the data so obtained from the three SDSS surveys, were thinking on the lines of Big Bang theory. It is widely believed that at the moment when Big Bang occurred, everything which we are seeing now was in the form of Photons. As the time passed on, the ratio of ‘Photon: matter’ began to change. 50,000 years later, the amount of matter equaled the number of Photons. The ratio is increasing since then. Hence SDSS team was trying to figure the reason of this changing ratio.

    This Department of Energy venture was contributed by Bayron Oscillation Spectrographic Survey. The information about 900,000 mass clusters was selected from data set of 1.5 million galaxies. Most of these galaxies are called red Galaxies meaning, many of the stars which illuminate it are now red giants. The data was processed by powerful computers at DOE’s National Energy Research Scientific Computing Center (NERSC) and Riemann computer cluster at Berkeley Lab.

    The study is so far spans until present day from a time when Universe was half the current age. The results of the team presented on Jan 11 before annual meeting of the American Astronomical Society in Austin, Texas which are available online.  The data about the mass clustering of matter now rests with NERSC. Researchers believe that though the information processed with the help of powerful computer is in the form of images, it still has a lot of potential in exploring the unknown aspects of matter, vacuum and invisible matter.

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