379 citations · 1.6k across the 22 of their papers we have counts for
22 papers
Asymmetrical shape of the Near-Infrared K 4p-5s doublet perturbed by He and H2
N. F. Allard, J. F. Kielkopf
The goal of this paper is to provide an exhaustive study of the K 4p-5s doublet at 1.243/1.252~m perturbed by He and H in physical conditions of brown dwarfs. This work is a…
A blue depression in the optical spectra of M dwarfs
Hugh R. A. Jones, Yakiv Pavlenko, Yuri Lyubchik +3
A blue depression is found in the spectra of M dwarfs from 4000 to 4500A. This depression shows an increase toward lower temperatures though is particularly sensitive to gravity an…
The nearby magnetic cool DZ white dwarf PM J08186-3110
Adela Kawka, Stéphane Vennes, Nicole F. Allard +2
We present an analysis of photometric, spectroscopic and spectropolarimetric data of the nearby, cool, magnetic DZ white dwarf PM J08186-3110. High dispersion spectra show the pres…
A new set of atmosphere and evolution models for cool T-Y brown dwarfs and giant exoplanets
Mark W. Phillips, Pascal Tremblin, Isabelle Baraffe +6
We present a new set of solar metallicity atmosphere and evolutionary models for very cool brown dwarfs and self-luminous giant exoplanets, which we term ATMO 2020. Atmosphere mode…
H--He collision-induced satellite in the Lyman- profile of DBA white dwarf stars
Nicole F. Allard, John F. Kielkopf, Siyi Xu +6
The spectra of helium-dominated white dwarf stars with hydrogen in their atmosphere present a distinctive broad feature centered around 1160~Å\/ in the blue wing of the Lyman- l…
Mass-Metallicity Trends in Transiting Exoplanets from Atmospheric Abundances of HO, Na, and K
Luis Welbanks, Nikku Madhusudhan, Nicole F. Allard +3
Atmospheric compositions can provide powerful diagnostics of formation and migration histories of planetary systems. We investigate constraints on atmospheric abundances of HO,…