La conférence publique Helen Sawyer Hogg

La conférence Helen Sawyer Hogg a été créée en 1985 par la Société canadienne d’astronomie avec la participation de la Société royale d’astronomie du Canada (SRAC), l’Association des planétariums du Canada et l’Institut royal canadien. Depuis, cette conférence publique, supportée conjointement par le fonds de la CASCA et par la SRAC, se tient annuellement au congrès de l’une ou de l’autre des sociétés, en alternance. Elle se veut une reconnaissance des contributions soutenues et diverses de Helen Sawyer Hogg à la prise de conscience du public de l’Univers qui nous entoure. Le choix du conférencier est arrêté par un comité composé des présidents de la CASCA et de la SRAC, ainsi que du président du comité organisateur local, hôte de la rencontre (la CASCA ou la SRAC).

La conférence Helen Sawyer Hogg 2021

Andrea Ghez, University of California, Los Angeles.

From the Possibility to the Certainty of a Supermassive Black Hole

Learn about new developments in the study of supermassive black holes. Through the capture and analysis of twenty years of high-resolution imaging, the UCLA Galactic Center Group has moved the case for a supermassive black hole at the center of our galaxy from a possibility to a certainty and provided the best evidence to date for the existence of these truly exotic objects. This was made possible with the first measurements of stellar orbits around a galactic nucleus. Further advances in state-of-the-art of high-resolution imaging technology on the world’s largest telescopes have greatly expanded the power of using stellar orbits to study black holes. Recent observations have revealed an environment around the black hole that is quite unexpected (young stars where there should be none; a lack of old stars where there should be many; and a puzzling new class of objects). Continued measurements of the motions of stars have solved many of the puzzles posed by these perplexing populations of stars. This work is providing insight into how black holes grow and the role that they play in regulating the growth of their host galaxies. Measurements this past year of stellar orbits at the Galactic Center have provided new insight on how gravity works near a supermassive hole, a new and unexplored regime for this fundamental force of nature.

Les récipiendaires jusqu’à ce jour ont été:
2021 Andrea Ghez From the Possibility to the Certainty of a Supermassive Black Hole
2019 Sera Markoff Imaging (and Imagining) Black Holes
2018 Emily Lakdawalla The Golden Age of Solar System Exploration
2017 Fiona Harrison From Spinning Black Holes to Exploding Stars: A New View of the High Energy Universe
2016 Ann Hornschemeier All the X-ray binaries in the Universe
2015 Roberto Abraham First Results from Dragonfly
2014 Laura Ferrarese The Hidden Lives of Galaxies
2013 Malcolm Longair Cosmology – its tortuous history, glorious present and bright future
2012 Dame Jocelyn Bell Burnell Will the World End in 2012? The astronomical Evidence.
2011 Dimitar Sasselov The Search for a Sister Earth
2010 René Doyon First Images of Exoplanets
2009 Lawrence Krauss Life, the Universe and Nothing
2008 Phil Plait Bad Astronomy
2007 Steven Squyres Science Results from the Mars Exploration Rover Mission
2006 Alan Hildebrand Hunting for Doomsday asteroids from Earth and Space
2005 Michel Mayor Des planètes gazeuses aux planètes rocheuses: Dix ans de découvertes de planètes extrasolaires
2004 Sara Schechner Politics and the Dimensions of the Solar System: John Winthrop’s Observations of the Transits of Venus Expedition to St. John’s, June 1761
2003 Michael Shara Stellar Promiscuity and Destruction
2002 Paul Hodge Barnard’s Galaxy: Its Mysteries Revealed
2001 Jill Tarter Pulling Signals out of Noise
2000 Wendy Freedman The Age and Size of the Universe
1999 Paul Chodas The Impact Threat and Public Perception
1998 David Crampton Exploring the Frontier of the Universe with New Eyes
1997 Vera Rubin What Hubble Didn’t Know About Our Galaxy
1996 Werner Israel Black Holes
1995 David H. Levy Springtime on Jupiter – a personal perspective on Comet Shoemaker-Levy 9
1994 George Efstathiou The Origin of Galaxies
1993 Margaret Geller Mapping the Universe: So Many Galaxies, So Little Time
1992 Alan R. Hildebrand The Cretaceous / Tertiary Boundary Impact (or the Dinosaurs Didn’t Have A Chance)
1991 Kimmo A. Innanen The Prediction and Discovery of a New Solar System Object: The Planetary Trojan Asteroids
1990 Joseph Veverka Exploration of the Solar System: Voyager and Beyond
1989 Roger Cayrel La construction du téléscope CFH
1988 Hubert Reeves Early Moments of the Universe
1987 René Racine Small is Beautiful: The Quest for High Resolution Imaging in Astronomy
1986 Barry Madore The Hubble Space Telescope
1985 Owen Gingerich The Mysterious Nebulae, 1610-1924

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