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21 papers · 2 filters
A Spectro-photometric Analysis of Cool White Dwarfs in the Gaia and Pan-STARRS Footprint
Alexandre Caron, Pierre Bergeron, Simon Blouin +1
We present a spectro-photometric analysis of 2880 cool white dwarfs within 100 pc of the Sun and cooler than Teff = 10,000 K, with grizy Pan-STARRS photometry and Gaia trigonometri…
Models for Metal-Poor Stars with Different Initial Abundances of C, N, O, Mg, and Si. III. Grids of Isochrones for [Fe/H] and Helium Abundances and at Each Metallicity
Don A. VandenBerg
Stellar evolutionary tracks for have been computed for each of several variations in the abundances of C, N, and O, assuming mass-fraction helium abund…
Missing metals in DQ stars: A simple explanation
Simon Blouin
Classical DQ stars are white dwarfs whose atmospheres contain detectable traces of carbon brought up to the surface by a convective dredge-up process. Intriguingly, unlike other wh…
Current challenges in the physics of white dwarf stars
D. Saumon, S. Blouin, P. -E. Tremblay
White dwarfs are a class of stars with unique physical properties. They present many challenging problems whose solution requires the application of advanced theories of dense matt…
Accretion Burst Echoes as Probes of Protostellar Environments and Episodic Mass Assembly
Logan Francis, Doug Johnstone, Jeong-Eun Lee +5
Protostars likely accrete material at a highly time variable rate, however, measurements of accretion variability from the youngest protostars are rare, as they are still deeply em…
The JCMT Transient Survey: Single Epoch Transients and Variability of Faint Sources
Doug Johnstone, Bhavana Lalchand, Steve Mairs +13
Short-duration flares at millimeter wavelengths provide unique insights into the strongest magnetic reconnection events in stellar coronae, and combine with longer-term variability…