2 years, 9 months ago
What heavier metal elements did the Sloan Digital Survey, Milky Way Tomography discover?
How widely spread were the heavier elements in the Milky Way?
Why does it seem that the galactic Halo has 1/300 less iron than the Sun?
Do other galaxy's exhibit the same distribution patterns of heavier elements?
Why does it seem that the galactic Halo has 1/300 less iron than the Sun?
Do other galaxy's exhibit the same distribution patterns of heavier elements?
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This coloured image shows the new metallicity map and indicates that the disc is composed of high-metallicity stars that are typically just a few billion years old (red and yellow shades), with a low-density stellar halo composed of lower metallicity stars with ages over 10 billion years (blue shades).
The Sloan Digital Sky Survey on the Milky Way made a tomography of the compositions of more than 2.5 million stars finding among other, heavier metals like Iron, Calcium and Carbon.
According to "www.physorg.com":
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"The map of the distribution of metallicity for several million stars reveals the differing content of chemical elements in the stellar populations of our Galaxy," says Zeljko Ivezic of the University of Washington. "By using two-dimensional images in different colors, we build up a three-dimensional ‘tomographic’ map that clearly delineates the disc and halo components of the Milky Way".
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The Sloan Digital Sky Survey (SDSS) relay on this 2.5-meter telescope in order to create the most ambitious sky map in the history of astronomy.
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