Hubble Telescope discovers ancient quasars with brightness of 600-trillion suns
10 Janvier, 2019, 15:39 | Auteur: Therese Cote
Light from the quasar serendipitously passed near a galaxy between Earth and the source on its path to us, scientists found.
This is the first time the camera has acted up like this, said Cheryl Gundy, a spokeswoman with the SpaceTelescope Science Institute in Baltimore, which handles science operations for the telescope.
Calculations found that the light had been significantly "redshifted" - a phenomenon where the wavelength of a beam of light expands over vast amounts of time and distance. If the lensing galaxy in this system were just half a magnitude brighter, researchers may have entirely missed the quasar.
Blood Moon on show for much of the world
Ottawa astronomer Gary Boyle explains: "An eclipse is a result of the ideal lineup of the sun, Earth and moon". The third solar eclipse of 2019 will take place on December 26, when a shadow will be seen around the sun.
The data shows not only that the supermassive black hole is accreting matter to itself at an extremely high rate, but also that the quasar may be producing up to 10,000 stars per year, scientists said.
Astronomers said the quasar has a brightness equivalent to about 600 trillion suns and the supermassive black hole powering it is several hundred million times as massive as our sun. By comparison, the Milky Way produces about one new star a year.
Lead author Xiaohui Fan, of the University of Arizona, said he did not expect to find many quasars brighter than this in the whole universe.
He added: "Its properties and its distance make it a prime candidate to investigate the evolution of distant quasars and the role supermassive black holes in their centres had on star formation". Luckily, the newly studied quasar and galaxy were just bright enough to be flagged as potential distant-universe objects.
The galaxy bent the light from the quasar making it appear three times as large and 50 times as bright as it would have been without the effect of gravitational lensing, astronomers said.
Named after the American astronomer Edwin Hubble, the veteran telescope has been cranking away for more than quarter of century since it was launched in 1990.
Plusieurs clients n'ont pas hésité à interpeller la banque sur les réseaux sociaux pour faire part de leurs déboires. Résultat, impossible pour certains de réaliser des achats, des retraits d'espèces ou d'effectuer des virements .
It's still unclear if Murray will leave camp to attend the combine, but a source told Slusser he is leaning towards football. Murray plays center field in baseball and, obviously, can't still play for Oklahoma this spring.
The much-awaited Gully Boy trailer has been making waves on the internet ever since it was unveiled at a grand event yesterday. Also, it chronicles the lives of Mumbai's independent hip-hop artists. "This is the story of all of us", he said.
Moore said physicians at CHEO are seeing cases of RSV (respiratory syncytial virus) and other viruses as well as some flu. Experts say it takes about two weeks to build up immunity against the virus after getting vaccinated.
At that point, Durant stopped himself and said, "Let me just get out of here". "If I don't, I'll get fined". "I can't control what people say about me, or what they say about our future and what I should do", he said.
He won 10 races in the NASCAR PEAK Mexico Series in 2008 then moved to North Carolina to pursue NASCAR's national level. We use motorsports to showcase our latest technology and to attract the best talent in engineering and design.
DR Congo's Felix Tshisekedi: son, heir and president-elect
They would be deployed if needed to protect USA citizens and diplomatic facilities in DR Congo's capital, Kinshasa, he said. Election observers reported a number of irregularities during the vote and the opposition alleged it was marred by fraud.
Tigers stem Tide in championship rout
Clemson has produced 29 picks in the last five National Football League drafts. I am ready to move on to the next chapter in my life. I think those guys are going to continue it.
Networks Fact-Check Trump Speech
These recent television appearances have sparked debate about whether networks should air Trump's remarks in real-time. White House counselor Kellyanne Conway says the group had a "robust exchange" and 'questions were asked and answered'.