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标题: Oakley Oil Rig Sunglasse White Frame Yellow Lens 90% OFF [打印本页] 作者: RaymondSa 时间: 2016-7-21 05:05 标题: Oakley Oil Rig Sunglasse White Frame Yellow Lens 90% OFF Construction Begins on Canada's Largest Radio Telescope January 24
on Canada's largest radio telescope as well as the first research telescope to become built in the continent in more than 3 decades.
The new telescope, with a footprint bigger than six NHL hockey rinks, will listen for cosmic soundwaves and help scientists realise why the universe has expanded rapidly and find out about the mysterious energy that is supposedly driving the increase. because the area is federally protected from radio interference.
intend to map a quarter of the observable universe, says University of British Columbia astrophysicist Mark Halpern, the work principal investigator. is surely an ambitious, produced in Canada endeavor. no moving parts, the telescope has a 100 metre by 100 metre collecting area filled up with 2,560 low noise receivers designed with components adapted in the cell phone industry which, collectively, scan half of the sky every day.
CHIME telescope will be the most sensitive instrument on the globe for this kind of research as well as the DRAO is one of the best sites on the globe for this kind of research, says UBC astrophysicist and project co investigator Gary Hinshaw, who had been in Penticton to witness the groundbreaking in the telescope's foundation.
is one area that our community can be very proud of. collected through the CHIME telescope will be digitally sampled nearly one billion times per second, then processed to synthesize a graphic of the sky.
reside in an expanding universe, and the discovery following the 20th century that this rate of expansion is increasing, rather than reducing, has forced us to re examine basic assumptions about gravity on cosmic scales, and just what the universe is made from, says UBC astrophysicist and CHIME co investigator Kris Sigurdson.
appears to be filled with a very beautiful substance we call dark energy. Halpern: collected by CHIME will help us understand the reputation the Universe, and as a result how dark energy has driven its expansion. is funded simply by a $4.6 000 0000 investment through the Canada Foundation for Innovation. Astrophysicists at UBC, McGill University, the University of Toronto and the DRAO are collaborating on the project.
Website article from the University of Toronto.
TORONTO, ON (Wednesday, January 31, 2013)
A team of Canadian astrophysicists is set to begin mapping the largest volume of the observable Universe up to now. By observing hydrogen gas from seven to ten billion many years away across an incredible swath of sky, clients meet to measure the accelerating growth of the Universe as well as the force behind that expansion, dark energy.
The team's work will shed light on the expansion history of the Universe after the inflationary period bringing about the Big Bang and the emission in the microwave background, and prior to current accelerated expansion.
"By observing the event of the Universe, we are able to make precise measurements of dark energy," Prof. Ue Li Pen from the University of Toronto along with the said. "They will permit us to determine whether dark energy is evolving with time or be it a constant. (Along with what does this show. Dick Bond of the University of Toronto and CITA, and Prof. Keith Vanderlinde of the Dunlap Institute for Astronomy Astrophysics, as well as astrophysicists from ray ban sale UBC, McGill and also the Dominion Radio Astronomy Observatory (DRAO). The instrument is recognized as the Canadian Hydrogen Intensity Mapping Experiment (CHIME) along with a surface area in excess of six NHL hockey rinks.
Bond explained, "the origin of accelerated expansion is inextricably tied to how gravity interacts using the 'vacuum energy' whose nature has become the greatest mystery in physics for four decades. For CITA theorists the exciting data that may emerge is a rich banking center."
"This research takes a new type of telescope, which only recently became possible thanks to the huge rise in computing power," Vanderlinde said. "CHIME could be the country's largest radio telescope and survey heaven hundreds of times better than previous instruments."
CHIME will chart the expansion beginning in the time scale when cosmic acceleration appears to have turned on, from something such as 11 billion in years past (redshift 2.5) until 6.5 billion years back (redshift 0.8) .
The ambition is large. "We been mapping the universe for the hundred years since Edwin Hubble and to date we mapped maybe one per cent of that, and CHIME would like to map of a quarter of the observable universe", Pen said.
CHIME make use of a new technique called Hydrogen Intensity Mapping pioneered by a team led by Pen, which allows a radio telescope to map the structure of the universe in neutral hydrogen gas directly using radio observations, as an alternative to using optical telescopes to methodically catalogue each galaxy. It allows astrophysicists to survey huge volumes in the universe in 3d, and for half the cost of other methods.
"Hydrogen Intensity Mapping could have many applications," said Vanderlinde, "but the main goal for CHIME is usually to amass data on the evolution with the universe, to probe precisely what ray ban sale is accelerating its expansion. CHIME intentions to reveal cosmic acceleration in unprecedented detail".
The experiment use a new hybrid of both digital and analog radio telescope technology. A conventional telescope's parabolic dish has to be pointed. A digital software telescope doesn't have curvature, no preferred direction, and is simultaneously pointed everywhere of the sky at the same time, Pen explained, is actually comparatively sweet, obviously
CHIME will likely be built at the Dominion Radio Astronomy Observatory sheltered from the Okanagan Valley near Penticton, Bc on a radio quiet reserve protected against local rf interference by federal regulation and the surrounding hills. It'll be a set of five 100 metre long x 20 metre half pipes, lying side-by-side in a 100 metre square array made out of metal roofing struts, concrete legs and wire mesh, and may have no moving parts. It's going to work digitally inside the North South direction along the length of the half pipes, and definately will work as a traditional analog telescope from the East West direction. It's going to scan the sky above it within a line from horizon to horizon as the earth turns every single day, and stack the data it collects.
Bond is also and Director of the Canadian Institute for Advanced Research (CIFAR), cosmology and gravity program. He said great collaboration of CITA with all the Canadian Institute for Advanced Research, Cosmology and Gravity Program and its cross Canada nodes also includes our CHIME initiative." The CIFAR Cosmology ray ban 90% off and Gravity Program members engaged are: two CIFAR Fellows at CITA, Ue Li Pen and Bond, one Fellow at McGill, Matt Dobbs, two Fellows at UBC, Gary Hinshaw and Mark Halpern then one member of the CIFAR Junior Fellow Academy with the Dunlap Institute and the Department of Astronomy and Astrophysics, U of T, Keith Vanderlinde. Too, CITA Post Doctoral Fellows and students are involved in CHIME research.