129 citations · 273 across the 6 of their papers we have counts for
7 papers
Consistent Multi-Wavelength Spectral Modeling of Cool White Dwarfs with Carbon-Polluted Atmospheres
Jay Farihi, Piotr M. Kowalski, Sandy K. Leggett +3
This work presents atmospheric modeling of multi-wavelength spectra for eight cool white dwarfs with carbon-enriched atmospheres, with four each of spectral type DQ and DQp. The De…
The Coldest Known Y Dwarfs: Estimates of their Effective Temperatures
S. K. Leggett
For a decade there has been a factor of 2.5 gap in luminosity between the 275K WISE J085510.83-071442.5 (Luhman 2014) and all other Y dwarfs, with Teff >= 350K. Recently three obje…
The Binary White Dwarf LHS 3236
Hugh Harris, Conard Dahn, Trent Dupuy +13
The white dwarf LHS 3236 (WD1639+153) is shown to be a double-degenerate binary, with each component having a high mass. Astrometry at the U.S. Naval Observatory gives a parallax a…
The Discovery of a Debris Disk Around the DAV White Dwarf PG 1541+651
Mukremin Kilic, Adam J. Patterson, Sara Barber +2
To search for circumstellar disks around evolved stars, we targeted roughly 100 DA white dwarfs from the Palomar Green survey with the Peters Automated Infrared Imaging Telescope (…
Near-Infrared Constraints on the Presence of Warm Dust at Metal-Rich, Helium Atmosphere White Dwarfs
Mukremin Kilic, J. Farihi, Atsuko Nitta +1
Here, we present near-infrared spectroscopic observations of 15 helium atmosphere, metal-rich white dwarfs obtained at the NASA Infrared Telescope Facility. While a connection has…
Excess Infrared Radiation from a Massive DAZ White Dwarf: GD362 - a Debris Disk?
Mukremin Kilic, Ted von Hippel, S. K. Leggett +1
We report the discovery of excess K-band radiation from a massive DAZ white dwarf star, GD362. Combining infrared photometric and spectroscopic observations, we show that the exces…
Model Atmosphere Analysis of Two Very Cool White Dwarfs
P. Bergeron, S. K. Leggett
A detailed analysis of the very cool white dwarfs SDSS 1337+00 and LHS 3250 is presented. Model atmosphere calculations with improved collision-induced absorptions by molecular hyd…