Stefano Zarattini

Experience

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  Instituto de Astrofísica de Canarias

  Sept 2010 - May 2015

  Astrofísico Residente

  During my Ph.D. I worked on the topic of fossil galaxy groups. I focused my attention on different aspects: as a first step, I worked on the global properties of the clusters, then I moved to galaxy luminosity functions, to substructures, and stellar populations in their central galaxies.

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  University of Padova

  Aug 2015 - Dec 2015

  Guest Scientist

  During my Ph.D. in Tenerife, I also maintain my collaboration with Padova. In fact, mine was a joint Ph.D. between the two Universities. After defending my thesis, I went back to Padova to carry on the work on galaxy populations in central galaxies of fossil groups.

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  University of Trieste

  Jan 2016 - Aug 2017

  Postdoc position

  I received an "assegno di ricerca" grant to work on the comparison between models/simulations and observations using the CLASH-VLT data on galaxy clusters. I mainly worked on the presence of galaxy substructures in galaxy clusters, starting from a set of simulated clusters in which the characteristics (mass, relative position and velocity) were known a priori. Then, we tested most of the available method to detect substructures in galaxy clusters, with the aim of understanding their strengths and weaknesses. Show less

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  CEA - Commissariat à l'énergie atomique et aux énergies alternatives

  Sept 2017 - Sept 2019

  Postdoctoral Researcher

  Post-doctoral position in Observational Cosmology. I worked on the optical validation of a new catalog of galaxy clusters. I lead various successful observational proposals to top-class telescopes. In the last year I mainly worked in developing a new code to compute photometric redshifts using the Pan-STARRS survey. This code uses a set of about 2 million galaxies with known spectroscopic redshifts as the training set, then it uses all the available color information to estimate galaxy redshifts with a linear regression process. Show less

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  Università degli Studi di Padova

  Dec 2020 - Oct 2022

  Postdoctoral Researcher

  I worked on the photometric decomposition of the 66 bulgeless galaxies of the BEARD sample. The goal of this decomposition was to define quantitatively the fraction of the light that is due to the bulge in these galaxies. We found that more than 90% of the sample is indeed bulgeless, according to the most-used definition of bulge/total light ratio smaller than 0.1. We also characterise the galaxies in terms of their position of known scaling relations such as the Kormendy relation and the mass-size relation. We found that the bulges of bulgeless galaxies have smaller radii, when compared with normal bulges of the same masses. Show less

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  Instituto de Astrofísica de Canarias (IAC)

  Nov 2022 - Jul 2024

  Postdoctoral Researcher

  I joined the WEAVE galaxy cluster survey team and I mainly worked on the analysis of the Science Verification data of the WEAVE instrument (LIFU mode). Along with that, I also worked on characterising the properties of galaxies (colours and morphology) depending on their position on the cosmic web, finding that the dominant effect in these two aspects is due to local over density, whereas if a galaxy is within a filament only a second order effect can be seen in colours and morphologies.

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  Centro de Estudios de Física del Cosmos de Aragón (CEFCA)

  Jul 2024 - now

  Tenure Track Researcher