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A High Precision Survey of the D/H Ratio in the Nearby Interstellar Medium
S. D. Friedman, P. Chayer, E. B. Jenkins +4
We present high S/N measurements of the H I Ly alpha absorption line toward 16 Galactic targets which are at distances between approximately 190 and 2200 pc, all beyond the wall of…
Infall/Expansion Velocities in the Low-Mass Dense Cores L492, L694-2, and L1521F: Dependence on Position and Molecular Tracer
Jared Keown, Scott Schnee, Tyler L Bourke +6
Although surveys of infall motions in dense cores have been carried out for years, few surveys have focused on mapping infall across cores using multiple spectral line observations…
Intervening Mg II absorption systems from the SDSS DR12 quasar spectra
Srinivasan Raghunathan, Roger G. Clowes, Luis E. Campusano +3
We present the catalogue of the Mg II absorption systems detected at a high significance level using an automated search algorithm in the spectra of quasars from the twelfth data r…
Ultraviolet Fe II Emission in Fainter Quasars: Luminosity Dependences, and the Influence of Environments
Roger G. Clowes, Lutz Haberzettl, Srinivasan Raghunathan +5
We investigate the strength of ultraviolet Fe II emission in fainter quasars compared with brighter quasars for 1.0 <= z <= 1.8, using the SDSS (Sloan Digital Sky Survey) DR7QSO ca…