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Home NEWS Science News

ANU helps find supercluster of galaxies near Milky Way

Bioengineer by Bioengineer
December 21, 2016
in Science News
Reading Time: 2 mins read
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IMAGE

Credit: Supplied by the research team

The Australian National University (ANU) is part of an international team of astronomers that found one of the Universe's biggest superclusters of galaxies near the Milky Way.

Professor Matthew Colless from ANU said the Vela supercluster, which had previously gone undetected as it was hidden by stars and dust in the Milky Way, was a huge mass that influenced the motion of our Galaxy.

"This is one of the biggest concentrations of galaxies in the Universe – possibly the biggest in the neighbourhood of our Galaxy, but that will need to be confirmed by further study," said Professor Colless from the ANU Research School of Astronomy and Astrophysics.

"The gravity of the Vela supercluster may explain the difference between the measured motion of the Milky Way through space and the motion predicted from the distribution of previously mapped galaxies."

Professor Colless used the Anglo-Australian Telescope to measure distances for many galaxies to confirm earlier predictions that Vela was a supercluster. He also helped to estimate the supercluster's effect on the motion of the Milky Way.

The research involved astronomers based in South Africa, Australia and Europe. Two new Australian surveys starting in 2017 will confirm the size of the Vela supercluster.

"The Taipan optical survey will measure galaxy distances over a bigger area around Vela, while the WALLABY radio survey will be able to peer through the densest parts of the Milky Way into the supercluster's heart," Professor Colless said.

The research is published in Monthly Notices of the Royal Astronomical Society.

###

Picture description: The white/blue image is the Milky Way, with the central bulge on the left and the plane of the disk running horizontally across the region; the yellow/green dots are the distribution of galaxies in the nearby universe; the Vela supercluster (VSC) region is indicated, running across the Galactic plane; also shown is the location of the Shapley supercluster (SC), the other massive structure in the nearby universe.

FOR INTERVIEW:

Professor Matthew Colless
ANU Research School of Astronomy and Astrophysics
T: +61 2 6125 0266
M: +61 43 189 8345
E: [email protected]

FOR MEDIA ASSISTANCE:

Will Wright
ANU media team
T: +61 2 6125 7979
M: +61 478 337 740
E: [email protected]

Media Contact

Matthew Colless
[email protected]
61-431-898-345
@ANUmedia

http://www.anu.edu.au/media

############

Story Source: Materials provided by Scienmag

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