Sentences with phrase «galaxy mergers»
"Galaxy mergers" refers to the coming together of two or more galaxies in space. It's like when two or more large groups of stars, gas, and dust combine to create a bigger and more massive galaxy. Full definition
This result helps explain how galaxy mergers create the larger numbers of big star clusters seen in elliptical galaxies.
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We however do not yet know whether galaxy mergers are also responsible for these, or whether they are formed by cold gas gradually falling into the galaxy.
NGC 6240 is an important object to investigate in order to understand the physical and evolutional relationship among the processes of galaxy merger, the action of a starburst, and the phenomenon of an active galactic nucleus.
The new mega-galaxy, dubbed HXMM01, is the brightest, most luminous and most gas - rich submillimeter - bright galaxy merger known.
Conroy suspects that violent conditions in the early universe — such as galaxy mergers — shocked and compressed gas and dust in particular areas, creating agglomerations of thousands of stars in particular areas.
«We were looking for orbiting pairs of supermassive black holes, with one offset from the center of a galaxy, as telltale evidence of a previous galaxy merger,» said James Condon, of the National Radio Astronomy Observatory.
«Considering their extreme distance from Earth and the frenetic star - forming activity inside each, it's possible we may be witnessing the most intense galaxy merger known to date.»
Many other potential applications of this dataset are explored in the series of papers, and they include studying the role of faint galaxies during cosmic reionisation (starting just 380,000 years after the Big Bang), galaxy merger rates when the Universe was young, galactic winds, star formation as well as mapping the motions of stars in the early Universe.
But around this galaxy there is an almost complete Einstein Ring — the smeared out image of a star - forming galaxy merger far beyond.
In the dense enviroment of the Coma cluster there have probably been many galaxy mergers over billions of years, and the result is a cluster with a very low number of spiral and irregular galaxies.
A successful detection would give astrophysicists a better understanding of the astrophysics at the hearts of galaxy mergers, Mingarelli says, and provide a new avenue to study fundamental physics not accessible by any other means.
Simulations of galaxy formation suggest that such bright galaxy mergers could form, but not in the numbers seen during that active epoch.
«We were looking for orbiting pairs of supermassive black holes, with one offset from the center of a galaxy, as telltale evidence of a previous galaxy merger.
«These new observations help us put the pieces together by showing the first steps of a galaxy merger in the early Universe.»
These results contribute new information to the studies of galaxy evolution and its relation to galaxy - galaxy mergers.
Astronomers think that the galaxy merger process of NGC 6240 began about a billion years ago, so this work suggests that the later stages of the merger are what excited the gigantic starbursts and subsequent superwinds.
The team discovered the galaxy's peculiar features while conducting a Hubble survey of distant galaxies unleashing powerful blasts of radiation in the throes of galaxy mergers.
Doubts remained, because no one had shown that a galaxy merger would leave the holes orbiting within sufficiently dense gas, but new computer simulations have bolstered the idea.
Not coincidentally, galaxy mergers would also trigger the birth of a quasar by pouring material into the central supermassive black hole.
«This study was extremely interesting for our research group because we typically study star formation and AGN activity that happens during the galaxy merger, but now we are looking for recoiling black holes after the merger,» said David Sanders, an IfA astronomer involved in the study.
The galaxy mergers that bring two supermassive black holes close together are considered to be a common process in the universe, so astronomers expect that such binary pairs should be common.
Also, galaxy mergers and collisions will keep the gas and stars in the central part of active galaxies sufficiently stirred up so some of that material will become part of the accretion disk.
«We hope to make further studies and learn more about how these galaxy mergers actually stimulate the quasar activity.»