R
Ray Jayawardhana
Researcher at University of Toronto
Publications - 209
Citations - 10783
Ray Jayawardhana is an academic researcher from University of Toronto. The author has contributed to research in topics: Brown dwarf & Stars. The author has an hindex of 61, co-authored 200 publications receiving 10359 citations. Previous affiliations of Ray Jayawardhana include Keele University & California Institute of Technology.
Papers
More filters
Journal ArticleDOI
The t tauri phase down to nearly planetary masses : Echelle spectra of 82 very low mass stars and brown dwarfs
TL;DR: In this article, the authors used the largest high-resolution spectroscopic sample to date of young, very low mass stars and brown dwarfs, and investigated disk accretion in objects ranging from just above the hydrogen-burning limit all the way to nearly planetary masses.
Journal ArticleDOI
The Gemini Deep Planet Survey
David Lafrenière,René Doyon,Christian Marois,Daniel Nadeau,Ben R. Oppenheimer,Patrick F. Roche,Francois Rigaut,James R. Graham,Ray Jayawardhana,Doug Johnstone,Paul Kalas,Bruce Macintosh,Rene Racine +12 more
TL;DR: The results of the Gemini Deep Planet Survey as mentioned in this paper were obtained with the Altair adaptive optics system at the Gemini North telescope, and angular differential imaging was used to suppress the speckle noise of the central star.
Journal ArticleDOI
UBVRI Light Curves of 44 Type Ia Supernovae
Saurabh Jha,Saurabh Jha,Robert P. Kirshner,Peter Challis,Peter M. Garnavich,Thomas Matheson,Alicia M. Soderberg,Genevieve J. Graves,Malcolm Hicken,João Alves,Héctor G. Arce,Zoltan Balog,Pauline Barmby,Elizabeth J. Barton,Perry Berlind,Ann Bragg,Cesar Briceno,Warren R. Brown,J. H. Buckley,Nelson Caldwell,Michael L. Calkins,B. J. Carter,Kristi Dendy Concannon,R. Hank Donnelly,Kristoffer A. Eriksen,Daniel G. Fabricant,Emilio E. Falco,Fabrizio Fiore,Michael R. Garcia,Mercedes Gomez,Norman A. Grogin,Ted Groner,Paul J. Groot,Karl E. Haisch,Lee Hartmann,Carl Hergenrother,Matthew J. Holman,John P. Huchra,Ray Jayawardhana,D. Jerius,Sheila J. Kannappan,Dong-Woo Kim,Jan T. Kleyna,Christopher S. Kochanek,Daniel M. Koranyi,M. Krockenberger,Charles J. Lada,Kevin Luhman,Jane Luu,Lucas M. Macri,J. Mader,Andisheh Mahdavi,Massimo Marengo,Brian G. Marsden,Brian McLeod,Brian R. McNamara,S. Thomas Megeath,Dan Moraru,A. Mossman,August Muench,J. A. Muñoz,James Muzerolle,Orlando Naranjo,Kristin Nelson-Patel,Michael A. Pahre,Brian M. Patten,J. Peters,Wayne Peters,John C. Raymond,Kenneth J. Rines,Rudolph E. Schild,Gregory J. Sobczak,Timothy Spahr,John R. Stauffer,Robert P. Stefanik,Andrew Szentgyorgyi,Eric V. Tollestrup,Petri Vaisanen,Alexey Vikhlinin,Zhong Wang,S. P. Willner,Scott J. Wolk,Joseph Zajac,Ping Zhao,Krzysztof Z. Stanek +84 more
TL;DR: In this article, the authors present UBVRI photometry of 44 Type Ia supernovae (SNe Ia) observed from 1997 to 2001 as part of a continuing monitoring campaign at the Fred Lawrence Whipple Observatory of the Harvard-Smithsonian Center for Astrophysics.
Journal ArticleDOI
The Gemini Deep Planet Survey -- GDPS
David Lafrenière,René Doyon,Christian Marois,Daniel Nadeau,Ben R. Oppenheimer,Patrick F. Roche,Francois Rigaut,James R. Graham,Ray Jayawardhana,Doug Johnstone,Paul Kalas,Bruce Macintosh,Rene Racine +12 more
TL;DR: The results of the Gemini Deep Planet Survey as mentioned in this paper were obtained with the Altair adaptive optics system at the Gemini North telescope and angular differential imaging was used to suppress the speckle noise of the central star.
Journal ArticleDOI
Spectroscopy of Very Low Mass Stars and Brown Dwarfs in IC 2391: Lithium Depletion and Hα Emission
TL;DR: In this paper, the authors obtained intermediate-resolution optical spectroscopy of 44 candidate very low mass members of the nearby young open cluster IC 2391, including CTIO-160 (M7), which was shown to satisfy all criteria for being a substellar member of the cluster, including detection of the Li 6708 A doublet.