255 citations · 329 across the 5 of their papers we have counts for
7 papers
Composition, structure, and stability of the rutile TiO_2(110) surface: oxygen depletion, hydroxylation, hydrogen migration and water adsorption
Piotr M. Kowalski, Bernd Meyer, Dominik Marx
A comprehensive phase diagram of lowest-energy structures and compositions of the rutile TiO_2(110) surface in equilibrium with a surrounding gas phase at finite temperatures and p…
A Nearby Old Halo White Dwarf Candidate from the Sloan Digital Sky Survey
Patrick B. Hall, Piotr M. Kowalski, Hugh C. Harris +5
We report the discovery of a nearby, old, halo white dwarf candidate from the Sloan Digital Sky Survey. SDSS J110217.48+411315.4 has a proper motion of 1.75 arcsec/year and redder…
The First Mid-Infrared Spectra of Cool White Dwarfs
Mukremin Kilic, Piotr M. Kowalski, Fergal Mullally +2
We present the first mid-infrared spectra of two cool white dwarfs obtained with the Spitzer Space Telescope. We also present 3.5-8 micron photometry for 19 cool white dwarfs with…
White dwarf atmosphere models with Ly- opacity in the analysis of the white dwarf cooling sequence of NGC 6397
Piotr M. Kowalski
We discuss the importance of pure hydrogen white dwarf atmosphere models with Ly- far red wing opacity in the analysis of the white dwarf cooling sequence of the globular cl…
The Pseudo-continuum Bound-free Opacity of Hydrogen and its Importance in Cool White Dwarf Atmospheres
Piotr M. Kowalski
We investigate the importance of the pseudo-continuum bound-free opacity from hydrogen atoms in the atmospheres of cool white dwarfs. This source of absorption, when calculated by…
On the Dissociation Equilibrium of H2 in Very Cool, Helium-Rich White Dwarf Atmospheres
Piotr M. Kowalski
We investigate the dissociation equilibrium of in very cool, helium-rich white dwarf atmospheres. We present the solution of the non-ideal chemical equilibrium for the di…