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Raymond G. Carlberg

Raymond G. Carlberg

Cosmology & Gravity

Senior Fellow

University of Toronto

Canada Canada

Ray Carlberg is a Professor of Astronomy at the University of Toronto.  He received his B.Sc. (1972) from the University of Saskatchewan, and his M.Sc. (1975) and Ph.D. (1978) from the University of British Columbia.  He was a Visiting Assistant Professor of Physics at the University of Victoria from 1978-80, then became a NATO Fellow at the Institute of Astronomy at the University of Cambridge from 1980-82.  After two years as a Visiting Assistant Professor of Astronomy at the University of Toronto, he joined the Physics Department of York University in 1984 as an Assistant Professor, and became Associate Professor in 1986.

In 1987, he moved to the University of Toronto's Department of Astronomy, and became Full Professor in 1991.  He has held Visiting positions at Johns Hopkins University, Caltech, the University of Washington (Seattle), and the Carnegie Institution.  At present, he is a member of the NRC Herzberg Institute of Astrophysics Advisory Board and the Canada France Hawaii Telescope (CFHT) Canadian Time Assignment Committee.  He has been a Senior Fellow in CIFAR's Cosmology & Gravity Program since 1999.  In 2009, he was elected a Fellow of the Royal Society of Canada.

Prof. Carlberg is also involved in the detailed planning of the Canada-France-Hawaii Telescope Legacy Survey, the first really deep survey of the sky.  The primary goals will be to measure the properties of the dark matter and dark energy in the universe.

Prof. Carlberg's main interests are:
  • Observational cosmology 
  • He was the principal investigator of the Canadian Network for Observational Cosmology cluster and field galaxy surveys
  • galaxy formation theory
  • Extremely large telescope design and construction
  • He is the principal investigator of a major NSERC grant to undertake the development of the Canadian participation in a new, optical-infrared telescope in the 30m class.

Supernova Sonata from Alex Parker on Vimeo.

This video is a compilation of the 241 Type Ia supernovae seen in these fields during the CFHT Legacy Survey. The four Deep Fields are shown in color, and the positions of all the supernova are illustrated as time progresses. The animation is rendered at 15 frames per second, and each frame corresponds to just under a single day (one second in the animation corresponds to roughly two weeks of real time).

Each supernova is assigned a note to be played:

Volume = Distance: The volume of the note is determined by the distance to the supernova, with more distant supernova being quieter and fainter.

Pitch = "Stretch:" The pitch of the note was determined by the supernova's "stretch," a property of how the supernova brightens and fades. Higher stretch values played higher notes. The pitches were drawn from a Phrygian dominant scale.

Instrument = Mass of Host Galaxy: The instrument the note was played on was determined by the properties of the galaxy which hosted each supernova. Supernovae hosted by massive galaxies are played with a stand-up bass, while supernovae hosted by less massive galaxies are played with a grand piano.

Note that the brightness of the supernovae as shown in the animation are not to scale. Because they are so distant, even these extremely powerful explosions appear very faint upon reaching us here on Earth.

Created by Alex H. Parker (University of Victoria) and Melissa L. Graham (University of California Santa Barbara / LCOGT).
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