New radio map reveals large variety of beforehand unseen galaxies – Astronomy Now

February 19, 2019 - Comment

LOFAR observations of the galaxy cluster Abell 1314 within the constellation Ursa Main reveal radio emissions from electrons (proven in pink) that had been accelerated in collisions with different galaxy clusters. This overlay on an optical picture additionally reveals X-ray emissions (gray haze) as seen by the Chandra X-ray Observatory. Picture: Amanda Wilber/LOFAR Surveys Crew



LOFAR observations of the galaxy cluster Abell 1314 within the constellation Ursa Main reveal radio emissions from electrons (proven in pink) that had been accelerated in collisions with different galaxy clusters. This overlay on an optical picture additionally reveals X-ray emissions (gray haze) as seen by the Chandra X-ray Observatory. Picture: Amanda Wilber/LOFAR Surveys Crew

Within the preliminary phases of a brand new sky survey, the Low Frequency Array – LOFAR – radio telescope has lined 1 / 4 of the northern sky. Within the first 10 % of that knowledge to be launched, a global crew of astronomers has discovered 300,000 radio sources, nearly all of them beforehand undetected galaxies. The crew expects to search out upwards of 15 million radio sources by the point the survey is full.

“This sky map will likely be an exquisite scientific legacy for the long run,” stated Carole Jackson, Director Basic of ASTRON, the Netherlands Institute for Radio Astronomy. “It’s a testimony to the designers of LOFAR that this telescope performs so nicely. … Simply think about among the discoveries we could make alongside the best way. I actually look ahead to it.”

However pulling these discoveries from the LOFAR knowledge is a problem, requiring networked computer systems in a number of areas utilizing highly effective new algorithms.

“LOFAR produces monumental quantities of knowledge – now we have to course of the equal of 10 million DVDs of knowledge,” stated Cyril Tasse, a researcher on the Observatoire de Paris. “The LOFAR surveys had been just lately made attainable by a mathematical breakthrough in the best way we perceive interferometry.”

Raymond Oonk, with the SURFsara info communications expertise middle in Amsterdam, stated the LOFAR knowledge set “is the biggest astronomical knowledge assortment on the planet.”

“Processing the big knowledge units is a large problem for scientists. What usually would have taken centuries on an everyday pc was processed in lower than one 12 months utilizing the excessive throughput compute cluster (Grid) and experience.”

A particular challenge of the journal Astronomy & Astrophysics options 26 papers describing preliminary outcomes from the LOFAR survey. Supermassive black holes and galaxy clusters are main subjects of curiosity.



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