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What is "missing" in the Universe?
In the May 20, 2008, issue of The Astrophysical Journal, Charles Danforth and Mike Shull (University of Colorado, Boulder) report on NASA's Hubble Space Telescope and NASA's Far Ultraviolet Spectroscopic Explorer (FUSE) observations taken along sight-lines to 28 quasars. Their analysis represents the most detailed observations to date of how the intergalactic medium looks within about 4 Billion Light-Years of Earth. 
The astronomers say they have definitively found about half of the missing normal matter, called "Baryons", in the space between the galaxies.

This illustration shows how the Hubble Space Telescope searches for missing Baryons, by looking at the light from quasars several Billion Light-Years away. Imprinted on that light are the spectral fingerprints of the missing ordinary matter that absorbs the light at specific frequencies (shown in the colorful spectra at right). 
The missing Baryonic Matter helps trace out the structure of intergalactic space, called the "Cosmic Web".
Parole chiave: Graphs, Technical Drawings and Spectra

What is "missing" in the Universe?

In the May 20, 2008, issue of The Astrophysical Journal, Charles Danforth and Mike Shull (University of Colorado, Boulder) report on NASA's Hubble Space Telescope and NASA's Far Ultraviolet Spectroscopic Explorer (FUSE) observations taken along sight-lines to 28 quasars. Their analysis represents the most detailed observations to date of how the intergalactic medium looks within about 4 Billion Light-Years of Earth.
The astronomers say they have definitively found about half of the missing normal matter, called "Baryons", in the space between the galaxies.

This illustration shows how the Hubble Space Telescope searches for missing Baryons, by looking at the light from quasars several Billion Light-Years away. Imprinted on that light are the spectral fingerprints of the missing ordinary matter that absorbs the light at specific frequencies (shown in the colorful spectra at right).
The missing Baryonic Matter helps trace out the structure of intergalactic space, called the "Cosmic Web".

Supernova-PIA09119.jpg The_Evaporating_Planet.jpg The_Missing_Matter.jpg TwoSuns-PIA09227.jpg TwoSuns-PIA09229.jpg
Informazioni sul file
Nome del file:The_Missing_Matter.jpg
Nome album:MareKromium / The Universe in Super Definition
Valutazione (3 voti):55555(Mostra dettagli)
Parole chiave:Graphs, / Technical / Drawings / and / Spectra
Copyright:NASA, ESA, and A. Feild (STScI)
Dimensione del file:495 KiB
Data di inserimento:Giu 20, 2008
Dimensioni:3000 x 1976 pixels
Visualizzato:53 volte
URL:https://www.lunexit.it/gallery/displayimage.php?pid=20794
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