319 citations · 1.5k across the 18 of their papers we have counts for
18 papers
Collision-induced satellite in the blue wing of the Balmer-beta line and consequences on the Balmer series
F. Spiegelman, N. F. Allard, J. F. Kielkopf
In this paper we emphasize the non-Lorentzian behavior of the Balmer series in helium-dominated DBA white dwarf stars for which the decades-old problem exists for the determination…
Collisional effects in the blue wing of the Balmer-alpha line
N. F. Allard, F. Spiegelman, J. F. Kielkopf +1
In order to investigate the near wing of the Lyman-alpha line, accurate line profile calculations and molecular data are both required due to the existence of a close line satellit…
Collisional effects in the blue wing of Lyman-alpha
F. Spiegelman, N. F. Allard, J. F. Kielkopf
Spectral observations below Lyman-alpha are now obtained with the Cosmic Origin Spectrograph (COS) on the Hubble Space Telescope (HST). It is therefore necessary to provide an accu…
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…
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,…
New study of the line profiles of sodium perturbed by H2
N. F. Allard, F. Spiegelman, T. Leininger +1
The opacity of alkali atoms, most importantly of Na and K, plays a crucial role in the atmospheres of brown dwarfs and exoplanets. We present a comprehensive study of NaH2 collisio…