Search Results - "Lafrèniere, David"

The JWST/NIRISS Deep Spectroscopic Survey for Young Brown Dwarfs and Free-floating Planets by Langeveld, Adam B., Scholz, Aleks, Mužić, Koraljka, Jayawardhana, Ray, Capela, Daniel, Albert, Loïc, Doyon, René, Flagg, Laura, de Furio, Matthew, Johnstone, Doug, Lafrèniere, David, Meyer, Michael

“…Abstract The discovery and characterization of free-floating planetary-mass objects (FFPMOs) is fundamental to our understanding of star and planet formation…”
Get full text

STRONG BRIGHTNESS VARIATIONS SIGNAL CLOUDY-TO-CLEAR TRANSITION OF BROWN DWARFS by Radigan, Jacqueline, Lafreniere, David, Jayawardhana, Ray, ARTIGAU, ETIENNE

“…We report the results of a J-band search for cloud-related variability in the atmospheres of 62 L4-T9 dwarfs using the Du Pont 2.5 m telescope at Las Campanas…”
Get full text

Direct Imaging of Multiple Planets Orbiting the Star HR 8799 by Marois, Christian, Macintosh, Bruce, Barman, Travis, Zuckerman, B, Song, Inseok, Patience, Jennifer, Lafrenière, David, Doyon, René

“…Direct imaging of exoplanetary systems is a powerful technique that can reveal Jupiter-like planets in wide orbits, can enable detailed characterization of…”
Get full text

SUB-STELLAR COMPANIONS AND STELLAR MULTIPLICITY IN THE TAURUS STAR-FORMING REGION by Daemgen, Sebastian, Bonavita, Mariangela, Jayawardhana, Ray, Lafrenière, David, Janson, Markus

“…We present results from a large, high-spatial-resolution near-infrared imaging search for stellar and sub-stellar companions in the Taurus-Auriga star-forming…”
Get full text

BANYAN. II. VERY LOW MASS AND SUBSTELLAR CANDIDATE MEMBERS TO NEARBY, YOUNG KINEMATIC GROUPS WITH PREVIOUSLY KNOWN SIGNS OF YOUTH by Gagne, Jonathan, Lafreniere, David, Doyon, Rene, Malo, Lison, ARTIGAU, ETIENNE

“…We present Bayesian Analysis for Nearby Young AssociatioNs II (BANYAN II), a modified Bayesian analysis for assessing the membership of later-than-M5 objects…”
Get full text

LARGE-AMPLITUDE VARIATIONS OF AN L/T TRANSITION BROWN DWARF: MULTI-WAVELENGTH OBSERVATIONS OF PATCHY, HIGH-CONTRAST CLOUD FEATURES by RADIGAN, Jacqueline, JAYAWARDHANA, Ray, LAFRENIERE, David, ARTIGAU, Etienne, MARLEY, Mark, SAUMON, Didier

“…We present multiple-epoch photometric monitoring in the J, H, and KS bands of the T1.5 dwarf 2MASS J21392676+ 0220226 (2M2139), revealing persistent, periodic…”
Get full text

BANYAN. XI. The BANYAN Σ Multivariate Bayesian Algorithm to Identify Members of Young Associations with 150 pc by Gagné, Jonathan, Mamajek, Eric E., Malo, Lison, Riedel, Adric, Rodriguez, David, Lafrenière, David, Faherty, Jacqueline K., Roy-Loubier, Olivier, Pueyo, Laurent, Robin, Annie C., Doyon, René

“…Abstract BANYAN Σ is a new Bayesian algorithm to identify members of young stellar associations within 150 pc of the Sun. It includes 27 young associations…”
Get full text

BAYESIAN ANALYSIS TO IDENTIFY NEW STAR CANDIDATES IN NEARBY YOUNG STELLAR KINEMATIC GROUPS by Malo, Lison, Doyon, Rene, Lafreniere, David, ARTIGAU, ETIENNE, Gagne, Jonathan, Baron, Frederique, RIEDEL, ADRIG

“…We present a new method based on a Bayesian analysis to identify new members of nearby young kinematic groups. We use this method to find new young low-mass…”
Get full text

A New Algorithm for Point-Spread Function Subtraction in High-Contrast Imaging: A Demonstration with Angular Differential Imaging by Lafrenière, David, Marois, Christian, Doyon, René, Nadeau, Daniel, Artigau, Étienne

Get full text

BANYAN. IV. FUNDAMENTAL PARAMETERS OF LOW-MASS STAR CANDIDATES IN NEARBY YOUNG STELLAR KINEMATIC GROUPS—ISOCHRONAL AGE DETERMINATION USING MAGNETIC EVOLUTIONARY MODELS by Malo, Lison, Doyon, Rene, Feiden, Gregory A, Albert, Loic, Lafreniere, David, ARTIGAU, ETIENNE, Gagne, Jonathan, RIEDEL, ADRIC

“…Based on high-resolution optical spectra obtained with ESPaDOnS at Canada-France-Hawaii Telescope, we determine fundamental parameters (T sub(eff), R, L…”
Get full text

BANYAN. III. RADIAL VELOCITY, ROTATION, AND X-RAY EMISSION OF LOW-MASS STAR CANDIDATES IN NEARBY YOUNG KINEMATIC GROUPS by Malo, Lison, ARTIGAU, ETIENNE, Doyon, Rene, Lafreniere, David, Albert, Loic, Gagne, Jonathan

“…Based on high-resolution spectra obtained with PHOENIX at Gemini-South, CRIRES at VLT-UT1, and ESPaDOnS at the Canada-France-Hawaii Telescope, we present new…”
Get full text

BANYAN. V. A SYSTEMATIC ALL-SKY SURVEY FOR NEW VERY LATE-TYPE LOW-MASS STARS AND BROWN DWARFS IN NEARBY YOUNG MOVING GROUPS by Gagne, Jonathan, Lafreniere, David, Doyon, Rene, Malo, Lison, Artigau, Etienne

“…We present the BANYAN All-Sky Survey (BASS) catalog, consisting of 228 new late-type (M4-L6) candidate members of nearby young moving groups (YMGs) with an…”
Get full text

The Directly Imaged Planet Around the Young Solar Analog 1RXS J160929.1 – 210524: Confirmation of Common Proper Motion, Temperature, and Mass by Lafrenière, David, Jayawardhana, Ray, van Kerkwijk, Marten H

“…Giant planets are usually thought to form within a few tens of AU of their host stars, and hence it came as a surprise when we found what appeared to be a…”
Get full text

Out of the Darkness: High-resolution Detection of CO Absorption on the Nightside of WASP-33b by Mraz, Georgia, Darveau-Bernier, Antoine, Boucher, Anne, Cowan, Nicolas B., Lafrenière, David, Cadieux, Charles

“…Abstract We observed the ultrahot Jupiter WASP-33b with the SpectroPolarimètre InfraRouge on the Canada–France–Hawaii Telescope. Previous observations of the…”
Get full text

SPECTROSCOPIC CHARACTERIZATION OF HD 95086 b WITH THE GEMINI PLANET IMAGER by De Rosa, Robert J., Rameau, Julien, Patience, Jenny, Graham, James R., Doyon, René, Lafrenière, David, Macintosh, Bruce, Pueyo, Laurent, Rajan, Abhijith, Wang, Jason J., Ward-Duong, Kimberly, Hung, Li-Wei, Maire, Jérôme, Nielsen, Eric L., Ammons, S. Mark, Bulger, Joanna, Cardwell, Andrew, Chilcote, Jeffrey K., Galvez, Ramon L., Gerard, Benjamin L., Goodsell, Stephen, Hartung, Markus, Hibon, Pascale, Ingraham, Patrick, Johnson-Groh, Mara, Kalas, Paul, Konopacky, Quinn M., Marchis, Franck, Marois, Christian, Metchev, Stanimir, Morzinski, Katie M., Oppenheimer, Rebecca, Perrin, Marshall D., Rantakyrö, Fredrik T., Savransky, Dmitry, Thomas, Sandrine

“…ABSTRACT We present new H (1.5-1.8 m) photometric and K1 (1.9-2.2 m) spectroscopic observations of the young exoplanet HD 95086 b obtained with the Gemini…”
Get full text

Direct Imaging and Spectroscopy of a Planetary-Mass Candidate Companion to a Young Solar Analog by Lafrenière, David, Jayawardhana, Ray, van Kerkwijk, Marten H

“…We present Gemini near-infrared adaptive optics imaging and spectroscopy of a planetary-mass candidate companion to 1RXS J160929.1-210524, a roughly solar-mass…”
Get full text

Angular Differential Imaging: A Powerful High-Contrast Imaging Technique by Marois, Christian, Lafrenière, David, Doyon, René, Macintosh, Bruce, Nadeau, Daniel

“…Angular differential imaging is a high-contrast imaging technique that reduces quasistatic speckle noise and facilitates the detection of nearby companions. A…”
Get full text

AN ADAPTIVE OPTICS MULTIPLICITY CENSUS OF YOUNG STARS IN UPPER SCORPIUS by Lafreniere, David, Jayawardhana, Ray, van Kerkwijk, Marten H, Brandeker, Alexis, Janson, Markus

“…We present the results of a multiplicity survey of 91 stars spanning masses of ~0.2-10 M sub([middot in circle]) in the Upper Scorpius star-forming region,…”
Get full text

HIGH-CONTRAST IMAGING SEARCH FOR PLANETS AND BROWN DWARFS AROUND THE MOST MASSIVE STARS IN THE SOLAR NEIGHBORHOOD by Janson, Markus

“…There has been a long-standing discussion in the literature as to whether core accretion or disk instability is the dominant mode of planet formation. Over the…”
Get full text

A BROWN DWARF CENSUS FROM THE SIMP SURVEY by Robert, Jasmin, Gagné, Jonathan, Artigau, Étienne, Lafrenière, David, Nadeau, Daniel, Doyon, René, Malo, Lison, Albert, Loïc, Simard, Corinne, Gagliuffi, Daniella C. Bardalez, Burgasser, Adam J.

“…ABSTRACT We have conducted a near-infrared (NIR) proper motion survey, the Sondage Infrarouge de Mouvement Propre, in order to discover field ultracool dwarfs…”
Get full text