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Post Info TOPIC: IC 3418
Blobrana


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UGC 7630
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Discovery of a Blue Supergiant Star Born in the Wild

A duo of astronomers has discovered a Blue Supergiant star located far beyond our Milky Way Galaxy in the constellation Virgo. Over fifty-five million years ago, it emerged in an extremely wild environment, surrounded by intensely hot plasma and amidst raging cyclone winds. Research that included observations with Subaru Telescope's Faint Object Camera and Spectrograph (FOCAS) revealed unprecedented views of the star formation process in this intergalactic context and showed the promise of future investigations of a possibly new mode of star formation, unlike that within our Milky Way.
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IC 3418 is a galaxy that is most well noted for its tidal tail, which formed after the galaxy collided with the Virgo Supercluster some 54 million light years from Earth. The galaxy is home to many starburst regions.
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Blobrana


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RE: IC 3418
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Title: IC 3418: Star Formation in a Turbulent Wake
Authors: Janice A. Hester, Mark Seibert, James D. Neill, Ted K. Wyder, Armando Gil de Paz, Barry F. Madore, D. Christopher Martin, David Schiminovich, R. Michael Rich

Galaxy Evolution Explorer observations of IC 3418, a low surface brightness galaxy in the Virgo Cluster, revealed a striking 17 kpc UV tail of bright knots and diffuse emission. H alpha imaging confirms that star formation is ongoing in the tail. IC 3418 was likely recently ram pressure stripped on its first pass through Virgo. We suggest that star formation is occurring in molecular clouds that formed in IC 3418's turbulent stripped wake. Tides and ram pressure stripping (RPS) of molecular clouds are both disfavoured as tail formation mechanisms. The tail is similar to the few other observed star-forming tails, all of which likely formed during RPS. The tails' morphologies reflect the forces present during their formation and can be used to test for dynamical coupling between molecular and diffuse gas, thereby probing the origin of the star forming molecular gas.

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Blobrana


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Astronomers Discover Star-Studded Galaxy Tail

NASA's Galaxy Evolution Explorer has discovered a galaxy tail studded with bright knots of new stars. The tail, which was created as the galaxy IC 3418 plunged into the neighbouring Virgo cluster of galaxies, offers new insight into how stars form.
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Blobrana


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Posts: 131433
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Astronomers Discover Star-Studded Galaxy Tail

NASA's Galaxy Evolution Explorer has discovered a galaxy tail studded with bright knots of new stars. The tail, which was created as the galaxy IC 3418 plunged into the neighbouring Virgo cluster of galaxies, offers new insight into how stars form.
Collisions between galaxies are a fairly common occurrence in the universe. Our Milky Way galaxy will crash into the Andromeda galaxy in a few billion years. Galaxies tangle together, kicking gas and dust all around. Often the battered galaxies are left with tails of material stripped off during the violence.
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