Search for Galaxy Clusters in Stripe 82 with S-PLUS and SDSS data.

• Grant number: 23/07836-9
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: August 01, 2023
• End date: July 31, 2024
• Field of knowledge: Physical Sciences and Mathematics - Astronomy - Extragalactic Astrophysics
• Principal Investigator: Laerte Sodré Junior
• Grantee: Carlos Henrique Soares da Silva
• Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 11/51680-6 - Exploring the universe: from the galaxies formation to Earth-like planets with the Giant Magellan Telescope, AP.ESP

Abstract

A key approach to identifying galaxy clusters is by X-ray emission from their intergalactic gaseous medium (eg Sarazin 1988). X-ray surveys provide clearer and more complete catalogs than those obtained optically and, with measurements of the gas temperature and luminosity, the X-ray emission allows estimating the mass of the gas and the cluster (e.g. Allen et al. 2011 ). Takey et al. (2016) present a catalog of galaxy clusters in Stripe 82 (S82) from the Sloan Digital Sky Survey (SDSS), based on X-ray observations obtained by the XMM-Newton satellite. They also present a list of 40 candidates detected in X-rays, but with no optical counterpart and no redshift information available in the literature. As S82 is in the area covered by the S-PLUS (Mendes de Oliveira et al. 2019), our goal in this project is to use the photometric redshifts from this survey and the SDSS to optically identify these structures and study their properties. With the photometric redshifts we will be able to identify the galaxies that are possible members of these structures and thus determine the properties of the clusters and the galaxies that compose them. Our main objective is to use the high-quality photometric redshifts from the S-PLUS (Lima et al. 2022), as well as those obtained from the SDSS (Beck et al. 2016), to identify 40 clusters from Takey et al. (2016), detected in X-rays, but with neither optical identification nor spectroscopic redshifts available. At the same time, it is intended to introduce the student to topics related to the evolution of galaxies and large-scale structures, as a preparation for the future use of large observational facilities, such as the Giant Magellan Telescope.