469 citations · 1k across the 31 of their papers we have counts for
8 papers · 1 filter
The effect of spiral arms on the Sérsic photometry of galaxies
Alessandro Sonnenfeld
Context. The Sérsic profile is a widely-used model to describe the surface brightness distribution of galaxies. Spiral galaxies, however, are qualitatively different from a Sérsic…
GAlaxy Light profile convolutional neural NETworks (GaLNets). I. fast and accurate structural parameters for billion galaxy samples
R. Li, N. R. Napolitano, N. Roy +5
Next generation large sky surveys will observe up to billions of galaxies for which basic structural parameters are needed to study their evolution. This is a challenging task that…
The dark matter halo masses of elliptical galaxies as a function of observationally robust quantities
Alessandro Sonnenfeld, Crescenzo Tortora, Henk Hoekstra +9
Context. The assembly history of the stellar component of a massive elliptical galaxy is closely related to that of its dark matter halo. Measuring how the properties of galaxies c…
Statistical strong lensing. IV. Inferences with no individual source redshifts
Alessandro Sonnenfeld
Context. Strong lensing mass measurements require the knowledge of the redshift of both the lens and the source galaxy. Traditionally, spectroscopic redshifts are used for this pur…
Statistical strong lensing. III. Inferences with complete samples of lenses
Alessandro Sonnenfeld
Context. Existing samples of strong lenses have been assembled by giving priority to sample size, at the cost of having a complex selection function. With the advent of the next ge…
Statistical strong lensing. II. Cosmology and galaxy structure with time-delay lenses
Alessandro Sonnenfeld
Context. Time delay lensing is a powerful tool to measure the Hubble constant . In order to obtain an accurate estimate of from a sample of time delay strong lenses, how…