103 citations · 349 across the 15 of their papers we have counts for
15 papers
The evolutionary history of GD1400, a white dwarf-brown dwarf binary
S. L. Casewell, M. R. Burleigh, R. Napiwotzki +6
GD1400AB was one of the first known white dwarfbrown dwarf binaries, and is the only one of these systems where the white dwarf is a ZZ Ceti pulsator. Here we present both radia…
JWST Imaging of the Closest Globular Clusters -- I. Possible Infrared Excess Among White Dwarfs in NGC 6397
L. R. Bedin, D. Nardiello, M. Salaris +9
We present James Webb Space Telescope observations of the globular cluster NGC 6397 and use them to extend to infrared wavelengths the characterization of the cluster's entire whit…
Discovery of a Magnetic Double-Faced DBA White Dwarf
Adam Moss, P. Bergeron, Mukremin Kilic +4
We report the discovery of spectroscopic variations in the magnetic DBA white dwarf SDSS J091016.43+210554.2. Follow-up time-resolved spectroscopy at the Apache Point Observatory (…
Classification and parameterisation of a large Gaia sample of white dwarfs using XP spectra
O. Vincent, M. A. Barstow, S. Jordan +3
The latest Gaia data release in July 2022, DR3, added a number of important data products to those available in earlier releases, including radial velocity data, information on ste…
Electromagnetic characterization of the LISA verification binary ZTF J05265934
Alekzander Kosakowski, Thomas Kupfer, P. Bergeron +1
We present an analysis of new and archival data to the 20.506-minute LISA verification binary J052610.42593445.32 (J05265934). Our joint spectroscopic and photometric analysi…
Signs of Binary Evolution in 7 Magnetic DA White Dwarfs
Adam Moss, Mukremin Kilic, P. Bergeron +2
We present our findings on the spectral analysis of seven magnetic white dwarfs that were presumed to be double degenerates. We obtained time-resolved spectroscopy at the Gemini Ob…
A GALEX view of the DA White Dwarf Population
Renae E. Wall, Mukremin Kilic, P. Bergeron +1
We present a detailed model atmosphere analysis of 14001 DA white dwarfs from the Montreal White Dwarf Database with ultraviolet photometry from the GALEX mission. We use the 100 p…
On the Spectral Evolution of Hot White Dwarf Stars. IV. The Diffusion and Mixing of Residual Hydrogen in Helium-rich White Dwarfs
A. Bédard, P. Bergeron, P. Brassard
In the framework of our extensive modeling study of the spectral evolution of white dwarfs, we present here a new set of detailed calculations of the transport of residual hydrogen…
The Merger Fraction of Ultramassive White Dwarfs
Mukremin Kilic, Adam G. Moss, Alekzander Kosakowski +6
We search for merger products among the 25 most massive white dwarfs in the Montreal White Dwarf Database 100 pc sample through follow-up spectroscopy and high-cadence photometry.…
The HST large programme on NGC 6752 -- IV. The White Dwarf Sequence
L. R. Bedin, M. Salaris, J. Anderson +13
We present our final study of the white dwarf cooling sequence (WD CS) in the globular cluster NGC 6752. The investigation is the main goal of a dedicated Hubble Space Telescope la…
Toward a systematic cartography of the chemical stratification inside white dwarfs from deep asteroseismic probing of ZZ Ceti stars
S. Charpinet, N. Giammichele, P. Brassard +5
DA-type white dwarfs account for 80% of all white dwarfs and represent, for most of them, the ultimate outcome of the typical evolution of low-to-intermediate mass stars. Their int…
The HST Large Programme on NGC 6752. I. Serendipitous discovery of a dwarf Galaxy in background
L. R. Bedin, M. Salaris, R. M. Rich +12
As part of a large Hubble Space Telescope investigation aiming at reaching the faintest stars in the Galactic globular cluster NGC 6752, an ACS/WFC field was the subject of deep op…
On the Spectral Evolution of Helium-Atmosphere White Dwarfs Showing Traces of Hydrogen
Benoit Rolland, Pierre Bergeron, Gilles Fontaine
We present a detailed spectroscopic analysis of 115 helium-line (DB) and 28 cool, He-rich hydrogen-line (DA) white dwarfs based on atmosphere fits to optical spectroscopy and photo…
The Canada-France Imaging Survey: First results from the u-band component
Rodrigo Ibata, Alan McConnachie, Jean-Charles Cuillandre +41
The Canada-France Imaging Survey (CFIS) will map the northern high Galactic latitude sky in the -band ("CFIS-u", 10,000) and in the -band ("CFIS-r", 5,000$\,…
The HST Large Program on Omega Centauri. I. Multiple stellar populations at the bottom of the main sequence probed in NIR-Optical
A. P. Milone, A. F. Marino, L. R. Bedin +7
As part of a large investigation with Hubble Space Telescope to study the faintest stars within the globular cluster Omega Centauri, in this work we present early results on the mu…