379 citations · 518 across the 5 of their papers we have counts for
6 papers
K-H_2 Quasi-molecular absorption detected in the T-dwarf epsilon Indi Ba
France Allard, Nicole F. Allard, Derek Homeier +3
T-type dwarfs present a broad and shallow absorption feature centred around 6950 A in the blue wing of the K doublet at 0.77 micron which resembles in depth and shape the satellite…
Alkali Line Profiles in Ultracool White Dwarfs
Derek Homeier, Nicole F. Allard, Christine M. S. Johnas +2
We present PHOENIX atmosphere models for metal-rich cool white dwarfs using improved line shapes for the Na I and K I resonance doublets. Profiles for collisional broadening due to…
Alkali Line Profiles in Degenerate Dwarfs
Derek Homeier, Nicole F. Allard, France Allard
Ultracool stellar atmospheres show absorption by alkali resonance lines severely broadened by collisions with neutral perturbers. In the coolest and densest atmospheres, such as th…
Water vapour in the atmosphere of a transiting extrasolar planet
Giovanna Tinetti, Alfred Vidal-Madjar, Mao-Chang Liang +10
Water is predicted to be among, if not the most abundant molecular species after hydrogen in the atmospheres of close-in extrasolar giant planets (hot-Jupiters) Several attempts ha…
Modelling Alkali Line Absorption and Molecular Bands in Cool DAZs
Derek Homeier, Nicole F. Allard, France Allard +4
Two peculiar stars showing an apparent extremely broadened and strong NaI D absorption have been discovered in surveys for cool white dwarfs by Oppenheimer et al. (2001) and Harris…
FUSE Observation of the Ultramassive White Dwarf PG1658+441
J. Dupuis, P. Chayer, S. Vennes +2
We present an analysis of the Far Ultraviolet Spectroscopic Explorer (FUSE) spectrum of the ultramassive (M = 1.31 solar mass), magnetic (B_s = 2.3 MG) white dwarf PG 1658+441. The…