© 2015 Peter Free
Citation — to study
Chao-Wei Tsai, Peter Eisenhardt, Jingwen Wu, Daniel Stern, Roberto Assef, Andrew Blain, Carrie Bridge, Dominic Benford, Roc Cutri, Roger Griffith, Thomas Jarrett, Carol Lonsdale, Frank Masci, Leonidas Moustakas, Sara Petty, Jack Sayers, S. Adam Stanford, Edward Wright, Lin Yan, David Leisawitz, Fengchuan Liu, Amy Mainzer, Ian McLean, Deborah Padgett, Michael Skrutskie, Christopher Gelino, Charles Beichman, and Stéphanie Juneau, The Most Luminous Galaxies Discovered by WISE, The Astrophysical Journal via Cornell University Library — Astrophysics, Astrophysics of Galaxies, arXiv:1410.1751v2 (08 April 2015)
Citation — to press release
University of Leicester, Most luminous galaxy in universe discovered, ScienceDaily (21 May 2015)
From the University of Leicester:
A remote galaxy shining brightly with infrared light equal to more than 300 trillion suns has been discovered using data from NASA’s Wide-field Infrared Survey Explorer . . . WISE.
The galaxy, which belongs to a new class of objects — nicknamed extremely luminous infrared galaxies . . . ELIRGs — is the most luminous galaxy found to date.
“We are looking at a very intense phase of galaxy evolution,” said Chao-Wei Tsai of NASA’s Jet Propulsion Laboratory in Pasadena, “This dazzling light may be from the main growth spurt in the size of the galaxy’s black hole”
Supermassive black holes grow by drawing gas and matter into a disk around them. The disk heats up to beyond-sizzling temperatures of millions of degrees, blasting out high-energy, visible, ultraviolet, and X-ray light.
The light is blocked by surrounding cocoons of dust. As the dust heats up, it radiates infrared light.
Because light from the galaxy hosting the black hole has traveled 12.5 billion years to reach us, astronomers are seeing the object as it was in the past.
The new study reports a total of 20 new ELIRGs, including the most luminous galaxy found to date.
These galaxies, which are even more luminous than the ultraluminous infrared galaxies (ULIRGs) reported before, were not found earlier because of their distance, and because dust converts their powerful visible light into an incredible outpouring of infrared light.
“We found in a related study with WISE that as many as half of the most luminous galaxies only show up well in infrared light,” said Tsai.
© 2015 University of Leicester, Most luminous galaxy in universe discovered, ScienceDaily (21 May 2015) (extracts)
The moral? — New detection gizmos equal new discoveries
Just because we could not see it before did not mean that it was not there — fodder for the relativity of human philosophizing.