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Massive Supply of Gas Around Modern Galaxies |
Galaxies have a voracious appetite for fuel — in this case, fresh gas — but astronomers have had difficulty finding the pristine gas that should be falling onto galaxies. Now, scientists have provided direct empirical evidence for these gas flows using new observations from the Hubble Space Telescope.
The team led by Nicolas Lehner, research associate professor at the University of Notre Dame, is presenting its work January 11 at the meeting of the American Astronomical Society in Long Beach, Calif.
The team’s observations using Hubble’s two ultraviolet spectrographs, the Cosmic Origins Spectrograph and the Space Telescope Imaging Spectrograph, show large quantities of cool gas with very low quantities of heavy elements in the gaseous cocoons surrounding modern galaxies. The lack of heavy elements indicates this gas in the circumgalactic medium of the galaxies has not been strongly processed through stars. The members’ work, “The Bimodal Metallicity Distribution of the Cool Circumgalactic Medium at z<1,” has been submitted to the Astrophysical Journal.
Led by Lehner, the team of astronomers identified gaseous streams near galaxies through the absorption they imprint on the spectra of distant, bright background quasars. The atoms in the gas remove small amounts of the light, and as the light from the quasars passes through the gas around galaxies, the chemical elements leave characteristic spectral “fingerprints” that allow astronomers to study the physical and chemical properties of the gas. Lehner and collaborators searched for the signature of gas within about 100,000-300,000 light-years of galaxies, identifying this gas due to its strong hydrogen absorption, a known signature of circumgalactic gas. They subsequently determined the amount of “metals” — all elements heavier than hydrogen and helium — in this gas to test whether the circumgalactic matter was being newly accreted from intergalactic space and lacking in metals or being ejected from the galaxies themselves and strong in metals. continue reading 

sweetie my darling sun, tdy is our happy AllSaints4us), and i find myself with few simple notes for u, my soul, my love, my life, my light………
here is one most simple<3))……………

 
With halo over my head
Im turning down turning now to road
Which is laying ahead of your halo of your halo

With halo over your head
Im up and soar up and soar
To road that is our quest and never be over

To looking at your eyes
Its like cosmic ocean burned explosion
To looking into that heights
I find myself in solely devotion

To looking into my eyes
Your heart is sinking and you cannot thinking
That pure serenity, mere paradise
Its all what us linking

Ooo,ooo, we are bounding together
Ooo,ooo, its cutting like laser …

cozydark:

Massive Supply of Gas Around Modern Galaxies |

Galaxies have a voracious appetite for fuel — in this case, fresh gas — but astronomers have had difficulty finding the pristine gas that should be falling onto galaxies. Now, scientists have provided direct empirical evidence for these gas flows using new observations from the Hubble Space Telescope.

The team led by Nicolas Lehner, research associate professor at the University of Notre Dame, is presenting its work January 11 at the meeting of the American Astronomical Society in Long Beach, Calif.

The team’s observations using Hubble’s two ultraviolet spectrographs, the Cosmic Origins Spectrograph and the Space Telescope Imaging Spectrograph, show large quantities of cool gas with very low quantities of heavy elements in the gaseous cocoons surrounding modern galaxies. The lack of heavy elements indicates this gas in the circumgalactic medium of the galaxies has not been strongly processed through stars. The members’ work, “The Bimodal Metallicity Distribution of the Cool Circumgalactic Medium at z<1,” has been submitted to the Astrophysical Journal.

Led by Lehner, the team of astronomers identified gaseous streams near galaxies through the absorption they imprint on the spectra of distant, bright background quasars. The atoms in the gas remove small amounts of the light, and as the light from the quasars passes through the gas around galaxies, the chemical elements leave characteristic spectral “fingerprints” that allow astronomers to study the physical and chemical properties of the gas. Lehner and collaborators searched for the signature of gas within about 100,000-300,000 light-years of galaxies, identifying this gas due to its strong hydrogen absorption, a known signature of circumgalactic gas. They subsequently determined the amount of “metals” — all elements heavier than hydrogen and helium — in this gas to test whether the circumgalactic matter was being newly accreted from intergalactic space and lacking in metals or being ejected from the galaxies themselves and strong in metals. continue reading 

sweetie my darling sun, tdy is our happy AllSaints4us), and i find myself with few simple notes for u, my soul, my love, my life, my light………

here is one most simple<3))……………

 

With halo over my head

Im turning down turning now to road

Which is laying ahead of your halo of your halo

With halo over your head

Im up and soar up and soar

To road that is our quest and never be over

To looking at your eyes

Its like cosmic ocean burned explosion

To looking into that heights

I find myself in solely devotion

To looking into my eyes

Your heart is sinking and you cannot thinking

That pure serenity, mere paradise

Its all what us linking

Ooo,ooo, we are bounding together

Ooo,ooo, its cutting like laser …

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    Massive Supply of ‘Gas’ Around Modern Galaxies
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    sweetie my darling sun, tdy is our happy AllSaints4us), and i find myself with few simple notes for u, my soul, my love,...
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