Published On: Thu, Feb 11th, 2016

Astronomers Reveal Hidden Galaxies Behind a Milky Way

An artist’s sense of a galaxies found in a ‘Zone of Avoidance’ behind a Milky Way. This stage has been combined regulating a tangible positional information of a new galaxies and incidentally populating a segment with galaxies of opposite sizes, forms and colors. Credit: ICRAR

Using CSIRO’s Parkes Radio Telescope versed with an innovative receiver, a group of astronomers were means to see by a stars and dirt of a Milky Way, into a formerly unexplored segment of space. The find might assistance to explain a Great Attractor region, that appears to be sketch a Milky Way and hundreds of thousands of other galaxies towards it with a gravitational force homogeneous to a million billion Suns.

In a newly published investigate hundreds of dark circuitously galaxies have been complicated for a initial time, shedding light on a puzzling gravitational curiosity dubbed a Great Attractor. Despite being usually 250 million light years from Earth—very tighten in astronomical terms—the new galaxies had been dark from perspective until now by a possess galaxy, a Milky Way.

Lead author Professor Lister Staveley-Smith, from The University of Western Australia node of a International Center for Radio Astronomy Research (ICRAR), pronounced a group found 883 galaxies, a third of that had never been seen before. “The Milky Way is unequivocally pleasing of march and it’s unequivocally engaging to investigate a possess universe though it totally blocks out a perspective of a some-more apart galaxies behind it,” he said.

Professor Staveley-Smith pronounced scientists have been perplexing to get to a bottom of a puzzling Great Attractor given vital deviations from concept enlargement were initial detected in a 1970s and 1980s. “We don’t indeed know what’s causing this gravitational acceleration on a Milky Way or where it’s entrance from,” he said. “We know that in this segment there are a few unequivocally vast collections of galaxies we call clusters or superclusters, and a whole Milky Way is relocating towards them during some-more than dual million kilometers per hour.”

An annotated artist’s sense display radio waves roving from a new galaxies, afterwards flitting by a Milky Way and nearing during a Parkes radio telescope on Earth (not to scale). Credit: ICRAR

The investigate identified several new structures that could assistance to explain a transformation of a Milky Way, including 3 universe concentrations (named NW1, NW2 and NW3) and dual new clusters (named CW1 and CW2).

University of Cape Town astronomer Professor Renée Kraan-Korteweg pronounced astronomers have been perplexing to map a universe placement dark behind a Milky Way for decades. “We’ve used a operation of techniques though usually radio observations have unequivocally succeeded in permitting us to see by a thickest forehead covering of dirt and stars,” she said. “An normal universe contains 100 billion stars, so anticipating hundreds of new galaxies dark behind a Milky Way points to a lot of mass we didn’t know about until now.”

Dr. Bärbel Koribalski from CSIRO Astronomy and Space Science pronounced innovative technologies on a Parkes Radio telescope had done it probable to consult vast areas of a sky unequivocally quickly. “With a 21-cm multibeam receiver on Parkes we’re means to map a sky 13 times faster than we could before and make new discoveries during a most larger rate,” she said.

An animation display a plcae of a galaxies detected in a ‘Zone of Avoidance’. Until now this segment of space has remained dark from perspective since of a gas and dirt of a Milky Way that blocks light during visual wavelengths from reaching telescopes on Earth. By regulating CSIRO’s Parkes radio telescope to detect radio waves that can transport by a galaxy’s gas and dust, hundreds of new galaxies have been found in a segment of space famous to astronomers as a ‘Zone of Avoidance’. This animation has been combined regulating a tangible positional information of a new galaxies and incidentally populating a segment with galaxies of opposite sizes, forms and colours.

The investigate concerned researchers from Australia, South Africa, a US and a Netherlands, and was published currently in a Astronomical Journal.

PDF Copy of a Study: The Parkes HI Zone of Avoidance Survey

Source: International Center for Radio Astronomy Research

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