Widrow is funded by a Discovery Grant with the Natural Sciences and Engineering Research Council of Canada (NSERC). “And a few billion years after that, Andromeda and the Milky Way will collide and merge together to form a giant elliptical galaxy.”ĭr. “Within a few billion years Triangulum will be completely destroyed by Andromeda and its stars will be dispersed throughout the Andromeda halo,” says Dr. Triangulum, the third largest member of the Local Group, is about one-tenth the size of Andromeda. Our observations also suggest that the Triangulum Galaxy is being ripped apart by Andromeda.”Īndromeda, and our own galaxy the Milky Way, are the two largest members of a small cluster of galaxies known as the Local Group. “We believe that these stars are relics of small galaxies that were destroyed by the powerful tidal fields of a larger galaxy. “Our observations now show that stars also inhabit these outer halos,” says Dr. Jennifer Marshall, MSE/Texas A&M University,. Nearly 40 years ago, astronomers learned that galaxies are embedded in extended halos of dark matter. Galaxies are large collections of stars, often distributed in a disk-like pattern with spiral arms. Canada and France joined a large fraction (50) of their dark and grey telescope time from mid-2003 to early 2009 for a large project, the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS). This analysis demonstrates the feasibility of using peak statistics in cosmological studies. The findings from the first year of the survey are published this week in the journal Nature. We derived constraints on cosmological parameters using weak lensing peak statistics measured on the 130 deg 2 of the CanadaFranceHawaii Telescope Stripe 82 Survey. This map, the largest of its kind, will allow astronomers to test the hypothesis that galaxies grow by “cannibalizing” other galaxies. The Pan-Andromeda Archeological Survey (PAndAS), led by Alan McConnachie of the Herzberg Institute of Astrophysics in Victoria BC, is using the Canada-France-Hawaii telescope to map the Andromeda and Triangulum galaxies. Their simulations illustrate how the strong gravitational field of Andromeda could have pulled stars away from the Triangulum disk creating a stream just as the team saw. Widrow, along with John Dubinsky of the University of Toronto, recreated this galactic encounter using a high performance computer and theoretical modeling. The Master Plan explicitly recognizes CFHT as one of the summit sites that will be redeveloped, while the Comprehensive Management Plan prescribes the. “The collision between the galaxies appears to have caused millions of stars to be ripped from the Triangulum disk to form a faint stream visible in the PAndAS data.”ĭr. Widrow, a professor of Physics, Engineering Physics and Astronomy at Queen’s. CFHT is a joint research facility of NRC (Canada), CNRS (France), and the University of Hawai'i. 4,102 likes 106 talking about this 15 were here. “The encounter forever changed the structure of the galaxies,” says Dr. Canada France Hawai'i Telescope, Kamuela.
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