"I had fun doing my bit, and my highschool studentswere involved, too," said one Galaxy Zoo 2 volunteer, schoolteacherMikeTracey. For their part, many of the volunteers were happy to be ofassistance.
A narrow jet is directed along the black hole spin axis, which is strongly misaligned from the rotation axis of the orbit. Masters expressed appreciation forthe Galaxy Zoo 2 users'help. MaArtist impression of the X-ray binary system MAXI J1820+070 containing a black hole (small black dot at the center of the gaseous disk) and a companion star. Question with more work on the Galaxy Zoo data set.? ?It?s not yet clear whether the barsare some side effect ofan external process that turns spiral galaxies red, or if they alonecan causethis transformation," Masters said. It's also unknown if the bars somehowcause galaxies to stopforming stars, or if they're just a consequence of some as-yet unknownprocess,researchers said. Death Spiral: a Black Hole Spins on Its Side. Butastronomersare still unclear on why some galaxies have bars and others do not. Thesebars are important in the evolutionof galaxies, providing a way to move material in and out inthe spiraldisk, and possibly helping to spark star formation in the centralregions,researchers said.īars may even help feed the centralmassive black hole thatseems to be present in almost all galaxies, researchers said.
The research will be detailed in anupcoming issue of the journalMonthly Notices of the Royal Astronomical Society.Ībout half of all spiral galaxieshave a bar structure. "For some time, data have hinted thatspirals with moreold stars are more likely to have bars, but with such a large number ofbarclassifications we?re much more confident about our results," saidstudyleader Karen Masters of the University of Portsmouth in a statement."Andall of this is thanks to the dedication of the volunteers who providethe raw'clicks.'" In red galaxies, this star formation has stopped, leavingbehind thecooler, long-lived stars that give them their reddish color. Bluegalaxies get their hue fromthe hot young stars they contain, implying that they are forming starsin largenumbers. With this information ? thelargest-ever sample of galaxieswith visual bar identifications ? researchers found that red spiralgalaxies are about twice as likely as blue spirals to hostbars. Galaxy Zoo 2 is building on this work by askingmembersof the public to look more closely at 250,000 galaxies, includingdeterminingif they have a central bar or not. The original GalaxyZoo asked volunteers to help classify galaxies by shape ? forexample, aselliptical or spiral.
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