234 citations · 563 across the 7 of their papers we have counts for
7 papers
Near-UV absorption in very cool DA white dwarfs
D. Saumon, J. B. Holberg, P. M. Kowalski
The atmospheres of very cool, hydrogen-rich white dwarfs (Teff <6000 K) are challenging to models because of the increased complexity of the equation of state, chemical equilibrium…
The Free-Free Opacity in Warm, Dense, and Weakly Ionized Helium
P. M. Kowalski, S. Mazevet, D. Saumon
We investigate the ionization and the opacity of warm, dense helium under conditions found in the atmospheres of cool white dwarf stars. Our particular interest is in densities up…
Non-Ideal Equation of State, Refraction and Opacities in Very Cool, Helium-Rich White Dwarf Atmospheres
P. M. Kowalski, D. Saumon, S. Mazevet
The atmospheres of cool, helium-rich white dwarfs constitute an exotic and poorly explored physical regime of stellar atmospheres. Under physical conditions where the temperature v…
Direct Detection of Galactic Halo Dark Matter
B. R. Oppenheimer, N. C. Hambly, A. P. Digby +2
The Milky Way Galaxy contains a large, spherical component which is believed to harbor a substantial amount of unseen matter. Recent observations indirectly suggest that as much as…
Observations of Ultracool White Dwarfs
B. R. Oppenheimer, D. Saumon, S. T. Hodgkin +6
We present new spectroscopic and photometric measurements of the white dwarfs LHS 3250 and WD 0346+246. Along with F351-50, these white dwarfs are the coolest ones known, all with…
The ages of very cool hydrogen-rich white dwarfs
M. Salaris, E. Garcia-Berro, M. Hernanz +2
The evolution of white dwarfs is essentially a cooling process that depends primarily on the energy stored in their degenerate cores and on the transparency of their envelopes. In…