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 Post subject: Hanny's Voorwerp
PostPosted: February 4th, 2011, 9:20 pm 
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Joined: October 12th, 2009, 3:28 pm
Posts: 3561
Location: Baton Rouge, LA
Discovered in 2007 by Dutch teacher Hanny van Arkel as a Galaxy Zoo participant, Hanny's Voorwerp is the luminous part of gas twisted around and nearby galaxy IC 2497. It's estimated that the entire streamer of gas is 300,000 light-years long.

Radio observations have pinpointed an outflow of gas from IC 2497, and now Hubble's WFC3 and ACS have uncovered a starbirth region on the IC 2497 side of Hanny's Voorwerp. The gas outflow is interacting with that region, causing gas to collapse and initiate stellar birth; the youngest stars are just a few million years old.

IC 2497 is 650 million light-years away in the constellation Leo Minor. The outflow is powered by a quasar. Yale University's Kevin Schawinski calls the system "the Rosetta Stone quasars".

More information at:
http://hubblesite.org/newscenter/archive/releases/2011/01/

Bill Keel, author of The Sky at Einstein's Feet, has a nice (albeit technical) Hanny's Voorwerp page:
http://www.astr.ua.edu/keel/research/voorwerp.html

Galaxy Zoo Personnel:
http://www.galaxyzoo.org/team


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 Post subject: Re: Hanny's Voorwerp
PostPosted: May 16th, 2017, 8:45 pm 
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Joined: October 12th, 2009, 3:28 pm
Posts: 3561
Location: Baton Rouge, LA
I haven't thought about this object in a while, but since HRPO may soon be used to gather data on Tabby's Star, I thought I'd look up more about it. Every once in a while, we encounter these wonderful events, like the adolescent who found the supernova.

More information:
http://www.skyandtelescope.com/astronomy-news/shining-new-light-on-hannys-voorwerp/
https://arxiv.org/abs/0906.5304


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