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
32 papers · 2 filters
Early-type stars in the core of the young open cluster Westerlund2
G. Rauw, J. Manfroid, E. Gosset +5
Aims. The properties of the early-type stars in the core of the Westerlund2 cluster are examined in order to establish a link between the cluster and the very massive Wolf-Rayet bi…
Diffraction-limited 3 um Spectroscopy of IRAS 04296+3429 and IRAS 05341+0852: Spatial Extent of Hydrocarbon Dust Emission and Dust Evolutionary Sequence
M. Goto, Sun Kwok, H. Takami +15
We present 3 um spectroscopy of the carbon-rich proto-planetary nebulae IRAS 04296+3429 and IRAS 05341+0852 conducted with the adaptive optics system at the Subaru Telescope. We ut…
Infrared Photometric Analysis of White Dwarfs from The Two Micron All Sky Survey and the Spitzer Space Telescope
P. -E. Tremblay, P. Bergeron
We review the available near- and mid-infrared photometry for white dwarfs obtained from the Two Micron All-Sky Survey (2MASS) and by the Spitzer Space Telescope. Both data sets ha…
Identifying and Characterizing New Nearby White Dwarfs
John P. Subasavage, Todd J. Henry, Pierre Bergeron +3
How confident are we that all of the nearest white dwarfs (WDs) have been identified? In an effort to answer this question, we have begun an initiative to identify and characterize…
Discovery of the brightest T dwarf in the northern hemisphere
Etienne Artigau, Rene Doyon, David Lafreniere +3
We report the discovery of a bright (H=12.77) brown dwarf designated SIMP J013656.5+093347. The discovery was made as part of a near-infrared proper motion survey, SIMP (Sondage In…
MOST Detects g-Modes in the Late-Type be Star beta CMi (B8Ve)
H. Saio, C. Cameron, R. Kuschnig +10
The Microvariability and Oscillations of stars (MOST) satellite has detected low-amplitude light variations (1 mmag) in the Be star CMi (B8Ve). The observations lasted…
HI studies of the Sculptor group galaxies. VIII. The background galaxies: NGC 24 and NGC 45
L. Chemin, C. Carignan, N. Drouin +1
In order to complete our HI survey of galaxies in the Sculptor group area, VLA observations of NGC 24 and NGC 45 are presented. These two galaxies of similar magnitude M_B ~ -17.4…
Comparison of Magnetic Field Structures on Different Scales in and around the Filamentary Dark Cloud GF 9
F. Poidevin, P. Bastien
New visible polarization data combined with existing IR and FIR polarization data are used to study how the magnetic field threading the filamentary molecular cloud GF 9 connects t…
Model Atmosphere Analysis of the Weakly Magnetic DZ White Dwarf G165-7
P. Dufour, P. Bergeron, G. D. Schmidt +5
A reanalysis of the strongly metal-blanketed DZ white dwarf G165-7 is presented. An improved grid of model atmospheres and synthetic spectra is used to analyze BVRI, JHK, and ugriz…
Most Detects G- and P-Modes in the B Supergiant HD 163899 (B2Ib/II)
H. Saio, R. Kuschnig, A. Gautschy +8
The {\it Microvariability and Oscillations of Stars (MOST)} satellite observed the B supergiant HD 163899 (B2 Ib/II) for 37 days as a guide star and detected 48 frequencies $\la$ 2…
Ultra-high energy cosmic rays, cascade gamma-rays, and high-energy neutrinos from gamma-ray bursts
Charles D. Dermer, Armen Atoyan
Gamma-ray bursts (GRBs) are sources of energetic, highly variable fluxes of gamma rays, which demonstrates that they are powerful particle accelerators. Besides relativistic electr…
Monte Carlo radiative transfer in protoplanetary disks
Christophe Pinte, Francois Menard, Gaspard Duchene +1
We present a new continuum 3D radiative transfer code, MCFOST, based on a Monte-Carlo method. MCFOST can be used to calculate (i) monochromatic images in scattered light and/or the…
A Quantitative Analysis of the Available Multicolor Photometry for Rapidly Pulsating Hot B Subdwarfs
P. -E. Tremblay, G. Fontaine, P. Brassard +2
We present a quantitative and homogeneous analysis of the broadband multicolor photometric data sets gathered so far on rapidly pulsating hot B subdwarf stars. This concerns seven…
C stars in the outer spheroid of NGC 6822
S. Demers, P. Battinelli, E. Artigau
From a 2 x 2 degree survey of NGC 6822 we have previously established that this Local Group dwarf irregular galaxy possesses a huge spheroid having more than one degree in length.…
Faint flux performance of an EMCCD
Olivier Daigle, Claude Carignan, Sebastien Blais-Ouellette
Thorough numerical simulations were run to test the performance of three processing methods of the data coming out from an electron multiplying charge coupled device (EMCCD), or lo…
The James Webb Space Telescope
Jonathan P. Gardner, John C. Mather, Mark Clampin +20
The James Webb Space Telescope (JWST) is a large (6.6m), cold (50K), infrared-optimized space observatory that will be launched early in the next decade. The observatory will have…
Mapping the ZZ Ceti Instability Strip: Discovery of 6 New Pulsators
A. Gianninas, P. Bergeron, G. Fontaine
As part of an ongoing program to map better the empirical instability strip of pulsating ZZ Ceti white dwarfs, we present a brief progress report based on our last observing season…
Accurate Astrometry and Photometry of Saturated and Coronagraphic Point Spread Functions
C. Marois, D. Lafreniere, B. Macintosh +1
Accurate astrometry and photometry of saturated and coronagraphic point spread functions (PSFs) are fundamental to both ground- and space-based high contrast imaging projects. For…
Discovery of the new slowly pulsating B star HD 163830 (B5II/III) from MOST spacebased photometry
C. Aerts, P. De Cat, R. Kuschnig +7
We report the discovery of a new slowly pulsating B (SPB) star, with the largest number of detected frequencies to date by more than a factor of three, based on 37 days of MOST (Mi…
Photometric Survey of the Polar ring galaxy NGC 6822
P. Battinelli, S. Demers, W. E. Kunkel
We have previously established, from a carbon star survey, that the Local Group dwarf irregular galaxy NGC 6822 is much larger than its central bright core. Four MegaCam fields are…
An Upper Limit on the Albedo of HD 209458b: Direct Imaging Photometry with the MOST Satellite
J. F. Rowe, J. M. Matthews, S. Seager +7
We present space-based photometry of the transiting exoplanetary system HD 209458 obtained with the MOST (Microvariablity and Oscillations of STars) satellite, spanning 14 days and…
New Praesepe white dwarfs and the initial mass-final mass relation
P. D. Dobbie, R. Napiwotzki, M. R. Burleigh +6
We report the spectroscopic confirmation of four further white dwarf members of Praesepe. This brings the total number of confirmed white dwarf members to eleven making this the se…
First Detection of NaI D lines in High-Redshift Damped Lyman-alpha Systems
Sohei Kondo, Naoto Kobayashi, Yosuke Minowa +15
A Near-infrared (1.18-1.35 micron) high-resolution spectrum of the gravitationally-lensed QSO APM 08279+5255 was obtained with the IRCS mounted on the Subaru Telescope using the AO…
Extended HI Rotation Curve and Mass Distribution of M31
Claude Carignan, Laurent Chemin, Walter K. Huchtmeier +1
New HI observations of Messier 31 (M31) obtained with the Effelsberg and Green Bank 100-m telescopes make it possible to measure the rotation curve of that galaxy out to ~35 kpc. B…