Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR2k papers
- University of British ColumbiaCA1.9k papers
- McGill UniversityCA1.9k papers
- University of VictoriaCA1.8k papers
- University of California, Santa CruzUS1.7k papers
- Rutherford Appleton LaboratoryGB1.7k papers
- University of ManchesterGB1.7k papers
- Queen Mary University of LondonGB1.7k papers
- University of PisaIT1.6k papers
- University of EdinburghGB1.6k papers
- University of BirminghamGB1.6k papers
- Heidelberg UniversityDE1.6k papers
41 papers · 2 filters
Spiral inflow feeding the nuclear starburst in M83, observed in H-alpha emission with the GHAFAS Fabry-Perot interferometer
Kambiz Fathi, John E. Beckman, Andreas A. Lundgren +8
We present observations of the nearby barred starburst galaxy, M83 (NGC5236), with the new Fabry-Perot interferometer GHAFAS mounted on the 4.2 meter William Herschel Telescope on…
New insights into the nature of the SMC WR/LBV binary HD 5980
C. Foellmi, G. Koenigsberger, L. Georgiev +14
We present the results of optical wavelength observations of the unusual SMC eclipsing binary system HD 5980 obtained in 1999 and 2004--2005. Radial velocity curves for the eruptin…
Rare White dwarf stars with carbon atmospheres
P. Dufour, James Liebert, G. Fontaine +1
White dwarfs represent the endpoint of stellar evolution for stars with initial masses between approximately 0.07 msun and 8-10 msun, where msun is the mass of the Sun (more massiv…
Nonradial p-modes in the G9.5 giant epsilon Oph? Pulsation model fits to MOST photometry
T. Kallinger, D. B. Guenther, J. M. Matthews +6
The G9.5 giant eps Oph shows evidence of radial p-mode pulsations in both radial velocity and luminosity. We re-examine the observed frequencies in the photometry and radial veloci…
The Very Low Albedo of an Extrasolar Planet: MOST Spacebased Photometry of HD 209458
Jason F. Rowe, Jaymie M. Matthews, Sara Seager +8
Measuring the albedo of an extrasolar planet provides insights into its atmospheric composition and its global thermal properties, including heat dissipation and weather patterns.…
Observations and asteroseismic analysis of the rapidly pulsating hot B subdwarf PG 0911+456
S. K. Randall, E. M. Green, V. Van Grootel +11
The principal aim of this project is to determine the structural parameters of the rapidly pulsating subdwarf B star PG 0911+456 from asteroseismology. Our work forms part of an on…
GHASP : an H alpha kinematic survey of spiral and irregular galaxies. V. Dark matter distribution in 36 nearby spiral galaxies
M. Spano, M. Marcelin, P. Amram +3
The results obtained from a study of the mass distribution of 36 spiral galaxies are presented. The galaxies were observed using Fabry-Perot interferometry as part of the GHASP sur…
The Ratio of Helium- to Hydrogen-Atmosphere White Dwarfs: Direct Evidence for Convective Mixing
P. -E. Tremblay, P. Bergeron
We determine the ratio of helium- to hydrogen-atmosphere white dwarf stars as a function of effective temperature from a model atmosphere analysis of the infrared photometric data…
Exploring the origin of neutron star magnetic field: magnetic properties of the progenitor OB stars
V. Petit, G. A. Wade, L. Drissen +1
Ferrario & Wickramasinghe (2006) explored the hypothesis that the magnetic fields of neutron stars are of fossil origin. In this context, they predicted the field distribution of t…
Confidence Level and Sensitivity Limits in High Contrast Imaging
C. Marois, D. Lafreniere, B. Macintosh +1
In long adaptive optics corrected exposures, exoplanet detections are currently limited by speckle noise originating from the telescope and instrument optics, and it is expected th…
Looking for Super-Earths in the HD 189733 System: A Search for Transits in Most Space-Based Photometry
Bryce Croll, Jaymie M. Matthews, Jason F. Rowe +10
We have made a comprehensive transit search for exoplanets down to ~1.5 - 2 Earth radii in the HD 189733 system, based on 21-days of nearly uninterrupted broadband optical photomet…
Predicting Solar Flares by Data Assimilation in Avalanche Models. I. Model Design and Validation
Eric Bélanger, Alain Vincent, Paul Charbonneau
Data assimilation techniques, developed in the last two decades mainly for weather prediction, produce better forecasts by taking advantage of both theoretical/numerical models and…
Transport processes in stars: diffusion, rotation, magnetic fields and internal waves
Suzanne Talon
In this paper, I explore various transport processes that have a large impact of the distribution of elements inside stars and thus, on stellar evolution. A heuristic description o…
Angular momentum transport by internal gravity waves III - Wave excitation by core convection and the Coriolis effect
Florian P. Pantillon, Suzanne Talon, Corinne Charbonnel
This is the third in a series of papers that deal with angular momentum transport by internal gravity waves. We concentrate on the waves excited by core convection in a 3Msun, Pop…
The assessment of the near infrared identification of Carbon stars. I. The Local Group galaxies WLM, IC 10 and NGC 6822
P. Battinelli, S. Demers, F. Mannucci
{The selection of AGB C and M stars from NIR colours has been done in recent years using adjustable criteria that are in needs of standardization if one wants to compare, in a cohe…
Quantifying Resonant Structure in NGC 6946 from Two-dimensional Kinematics
Kambiz Fathi, Silvia Toonen, Jesús Falcón-Barroso +5
We study the two-dimensional kinematics of the H-alpha-emitting gas in the nearby barred Scd galaxy, NGC 6946, in order to determine the pattern speed of the primary m=2 perturbati…
Dark matter in low mass surface density galaxies
Laurent Chemin, Claude Carignan, Philippe Amram
Low mass surface density spiral and irregular galaxies like low surface brightness (LSB) and dwarf galaxies are unique laboratories to study the dynamical properties of Dark Matter…
Dark Matter
Viktor Zacek
The nature of the main constituents of the mass of the universe is one of the outstanding riddles of cosmology and astro-particle physics. Current models explaining the evolution o…
A Comparative Study of Optical and Ultraviolet Effective Temperatures for DA White Dwarfs from the IUE Archive
C. -P. Lajoie, P. Bergeron
We present a comparative study of effective temperatures determined from the hydrogen Balmer lines and from the UV energy distribution for 140 DA white dwarfs drawn from the IUE ar…
Discovery of the strongly eccentric, short-period binary nature of the B-type system HD 313926 by the MOST satellite
Slavek Rucinski, Rainer Kuschnig, Jaymie M. Matthews +7
The MOST photometric space mission discovered an eclipsing binary among its guide stars in June 2006 which combines a relatively large eccentricity e = 0.20 with an orbital period…
MOST photometry of the RRd Lyrae variable AQ Leo: Two radial modes, 32 combination frequencies, and beyond
Michael Gruberbauer, Katrien Kohlenberg, Jason F. Rowe +12
Highly precise and nearly uninterrupted optical photometry of the RR Lyrae star AQ Leo was obtained with the MOST (Microvariability & Oscillations of STars) satellite over 34.4 day…
The Gemini Deep Planet Survey -- GDPS
David Lafreniere, Rene Doyon, Christian Marois +10
We present the results of the Gemini Deep Planet Survey, a near-infrared adaptive optics search for giant planets and brown dwarfs around nearby young stars. The observations were…
Stellar Evolution in NGC 6791: Mass Loss on the Red Giant Branch and the Formation of Low Mass White Dwarfs
Jasonjot S. Kalirai, P. Bergeron, Brad M. S. Hansen +4
We present the first detailed study of the properties (temperatures, gravities, and masses) of the NGC 6791 white dwarf population. This unique stellar system is both one of the ol…
The Differential Rotation of Kappa1 Ceti as Observed by MOST
Gordon A. H. Walker, Bryce Croll, Rainer Kuschnig +7
We first reported evidence for differential rotation of Kappa1 Ceti in Paper I. In this paper we demonstrate that the differential rotation pattern closely matches that for the Sun…