X-ray astronomy: the history of chemical enrichment of groups and clusters of galaxies

• Grant number: 18/02626-8
• Support type: Regular Research Grants
• Duration: May 01, 2018 - April 30, 2020
• Field of knowledge: Physical Sciences and Mathematics - Astronomy
• Principal Investigator: Tatiana Ferraz Laganá
• Grantee: Tatiana Ferraz Laganá
• Home Institution: Pró-Reitoria de Pós-Graduação e Pesquisa. Universidade Cruzeiro do Sul (UNICSUL). São Paulo , SP, Brazil
• Assoc. researchers: Melville Ulmer ; Paulo Afranio Augusto Lopes

Abstract

We know that heavier elements than boron were not produced in the primordial nucleosynthesis and are produced only inside the stars.In the 70's, the emission of heavy metal lines, such as silicon and iron, by the intra-cluster gas were detected.These observations show that this gas was enriched by metals transported from the intergalactic medium to the intra-group (IGM) or intra-cluster medium (ICM) byphysical mechanisms such as ram-pressure and galactic winds.Even today, due mainly to the observational limitations, little is known about the spatial distribution of the different chemical elementspresent in the IGM/ICM and the role of each physical mechanism in the transport of metals.Most current studies are limited to the analysis of a limited number of systems and focus on the radial profileof the chemical elements. In the literature we find few results of the spatial distribution of the different elements.Given the opportunities left in the investigation of the history of chemical evolution of groups and clusters of galaxies, we proposeto analyse the history of chemical enrichment of these systems, from two-dimensional maps constructed from X-ray observation data, andcompare the observational results to those obtained from hydrodynamical simulations.From this comparison we will better understand the role of the different mechanisms in transporting metals to the ICM/IGM.For the proposed project, we will use a sample of approximately 100 systems (four times larger than those currently used)with the objective of performing a pioneering work in the study of the spatial distribution of metals of groups andclusters of galaxies. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

LAGANA, T. F.; SOUZA, G. S.; MACHADO, R. E. G.; VOLERT, R. C.; LOPES, P. A. A. Two merging galaxy clusters with very hot shock fronts observed shortly before pericentric passage. Monthly Notices of the Royal Astronomical Society, v. 487, n. 3, p. 3922-3934, AUG 2019. Web of Science Citations: 0.

LAGANA, T. F.; DURRET, F.; LOPES, P. A. A. Physical properties of the X-ray gas as a dynamical diagnosis for galaxy clusters. Monthly Notices of the Royal Astronomical Society, v. 484, n. 2, p. 2807-2830, APR 2019. Web of Science Citations: 3.

MARTINS, LUCIMARA P.; LIMA-DIAS, CIRIA; COELHO, PAULA R. T.; LAGANA, TATIANA F. Testing stellar population fitting ingredients with Globular Clusters I: Stellar libraries. Monthly Notices of the Royal Astronomical Society, v. 484, n. 2, p. 2388-2402, APR 2019. Web of Science Citations: 0.