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Post Tagged with: "Active galactic nuclei"
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Sorte huller hjalp med at kvæle stjernedannelse i det tidlige Univers
Mens nogle galakser danner massevis af nye stjerner, dør andre ud og lever et mere passivt liv. Hvad der afholdt disse galakser fra at danne nye stjerner i en ung alder er ikke velforstået, bl.a. fordi de er så fjerne og lyssvage at de nødigt lader sig observere. Men ved at se på det samlede lys fra tusindvis af galakser er det nu lykkedes astronomer fra bl.a. Københavns Universitet at vise, at sorte huller hjalp til med at slukke for stjernedannelsen.
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Black holes helped quenching star formation in the early Universe
While some galaxies form stars at a continuous rate, others die out and lead a more passive life. What made these galaxies stop forming stars at an early age is not well established, not the least because they are so distant and faint that they evade being observed. But looking at the combined light from thousands of galaxies, a team of astronomers including the University of Copenhagen showed that black holes helped turn off star formation.
Astro-Pic Of the Day
- NGC 7635: The Bubble NebulaWhat created this huge space bubble? Blown by the wind from a star, this tantalizing, head-like apparition is cataloged as NGC 7635, but known simply as the Bubble Nebula