Galaxy Cluster Evolution over the Past 10 Billion Years
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Galaxy Cluster Evolution over the Past 10 Billion Years
Michael McDonald MIT Host: Francesca Civano Abstract: In recent years, the number of known galaxy clusters has grown dramatically, thanks in large part to the success of surveys utilizing the Sunyaev Zel'dovich effect. In particular, surveys like the South Pole Telescope 2500 deg^2 survey have discovered hundreds of distant clusters, allowing ...
已浏览 1.1万 次2017年11月30日
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Glowing galaxies crowd this Hubble view of the galaxy cluster Abell 3192. Like all clusters of galaxies, this one is full of hot gas that emits powerful X-rays, and it's also enveloped in a halo of something called dark matter – which is like the invisible scaffolding of our universe. All this matter, though not visible, has a huge effect on Abell 3192. That enormous amount of mass, combined with the mass of all these galaxies as well, is strong enough to curve spacetime around it. This is calle
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Glowing galaxies crowd this Hubble view of the galaxy cluster Abell 3192. Like all
NASA's Hubble Space
Young Star Cluster Trumpler 14 from Hubble Image Credit: NASA, ESA, and J. Maíz Apellániz (IoAoA Spain); Acknowledgment: N. Smith (U. Arizona) Explanation: Why does star cluster Trumpler 14 have so many bright stars? Because it is so young. Many cluster stars have formed only in the past 5 million years and are so hot they emit detectable X-rays. In older star clusters, most stars this young have already died -- typically exploding in a supernova -- leaving behind stars that are fainter and redd
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Young Star Cluster Trumpler 14 from Hubble Image Credit: NASA, ESA, and J. Maíz
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