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Stress testing the dark energy equation of state imprint on supernova data
Ben Moews, Rafael S. de Souza, Emille E. O. Ishida +4
This work determines the degree to which a standard Lambda-CDM analysis based on type Ia supernovae can identify deviations from a cosmological constant in the form of a redshift-d…
Astrophysical S-factors, thermonuclear rates, and electron screening potential for the He(d,p)He Big Bang reaction via a hierarchical Bayesian model
Rafael S. de Souza, Christian Iliadis, Alain Coc
We developed a hierarchical Bayesian framework to estimate S-factors and thermonuclear rates for the He(d,p)He reaction, which impacts the primordial abundances of He…
Gaia Data Release 2. Summary of the contents and survey properties
Gaia Collaboration, A. G. A. Brown, A. Vallenari +4
We present the second Gaia data release, Gaia DR2, consisting of astrometry, photometry, radial velocities, and information on astrophysical parameters and variability, for sources…
A case study of hurdle and generalized additive models in astronomy: the escape of ionizing radiation
M. W. Hattab, R. S. de Souza, B. Ciardi +3
The dark ages of the Universe end with the formation of the first generation of stars residing in primeval galaxies. These objects were the first to produce ultraviolet ionizing ph…
Gaia Data Release 2: Properties and validation of the radial velocities
D. Katz, P. Sartoretti, M. Cropper +51
For Gaia DR2 (GDR2), 280 million spectra, collected by the RVS instrument on-board Gaia, were processed and median radial velocities were derived for 9.8 million sources brighter t…