Jun 5, 2020. Download Hardik Panchal: Ek Ladki Jaari Khoya (2012) Hindi Full Movie.Miscellaneous – June 2016
A close-up image of the Large Magellanic Cloud is shown as it appears through the Keck Observatory's LRIS spectrograph. Credit: Keck Observatory/M. Livio
Keck Observatory Scientific Release
June 16, 2016
Larger than the galaxy the Milky Way, but with no major Big Bang explosions or black holes to speak of, the Small Magellanic Cloud has long been one of the Milky Way's larger satellites. It's a little sister of sorts, trailing alongside the Magellanic Stream and lingering in the general vicinity of the Milky Way. Because of this, its mysteries were among the first observations made by the Keck telescopes, which were used to search the cloud for supernovas.
A study led by astronomers from Carnegie Mellon University in the U.S. and the National Central University in Taiwan shows that the star-making potential of the Small Magellanic Cloud is greater than previously thought.
This isn't because the Small Magellanic Cloud is currently producing large numbers of stars. The real surprise is that it has a higher star-formation rate than the Milky Way, despite being about two times smaller.
The reason for this surprising finding is that the Small Magellanic Cloud appears to be powered by more gas in the region of the cloud's center than would be needed to form stars on the fly. The authors argue that this surprising gas density may be a result of a previous collision between the Small Magellanic Cloud and the Large Magellanic Cloud.
When the two large galaxies first collided about 200 million years ago, they had a giant cloud of hydrogen and helium bound together. This gas cloud was later broken apart, and the hydrogen gas formed a dwarf galaxy around the cloud's center. According to the new research, this hydrogen gas made its way back into the center of the smaller galaxy and was converted into stars.
"It's almost as if you smacked your hand against a bell," said Michael Boylan-Kolchin of Carnegie Mellon University. "The sudden impact of the initial collision caused the gas cloud to break up into smaller pieces. We think that this collision created a massive reservoir of gas that could later power the present-day star formation rate in the Small Magellanic Cloud."
The authors note that, because of the high ac619d1d87
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