Kinematics and stellar populations of nearby groups

• Grant number: 11/21325-0
• Support type: Scholarships in Brazil - Doctorate
• Effective date (Start): January 01, 2012
• Effective date (End): June 30, 2016
• Field of knowledge: Physical Sciences and Mathematics - Astronomy
• Principal Investigator: Claudia Lucia Mendes de Oliveira
• Grantee: Carlos Eduardo Barbosa
• Home Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated scholarship(s): 12/22676-3 - Reconstructing the assembly of the baryonic mass in the hydra i cluster (Abell 1060) core using a multi dimensional space, from deep photometry and spectroscopic observations, BE.EP.DR

Abstract

Although one of the most common environments in the universe, groups of galaxies have been relatively little studied. The majority of papers devoted to understand the role of the environment on the galactic properties made use of the rare and extreme environment of galaxy clusters. However, the group environment can give us the best informations about the galaxy evolution and the physical processes that trigger (or suppress) the formation of new stars.In this thesis, we will investigate the kinematics and the stellar populations in five nearby groups of galaxies, using spectroscopy obtained at the Blanco telescope, of groups HCG 22, HCG 42, HCG 62, NGC 193 e NGC 7619. Internal velocity dispersions and metallicities will be obtained for typically 40 galaxies in each of these groups, and then compared to literature groups (i.e., Mendel et al. 2008, 2009) and clusters (i.e., Poggianti el al. 2004).In addition to the optical characteristics, we will study the X-rays emission properties of the groups, using data taken from Chandra and XMM-Newton telescopes, to study the interactions between the galaxies and the hot intra-group gas. Thus, we will seek the understanding of the dominant physical mechanisms during the falling of galaxies into this environment, and the influence of the environment in the observational properties like morphology and star formation rate.Finally, we will build a toolkit for the photometric study of galaxies in the Javalambre Physics of the Accelerating Universe Astrophysical Survey (J-PAS) in order to measure properties like structural parameters, age, metallicities and alpha enhancements for millions of objects. However, the success of this thesis will not depend on the implementation of J-PAS, since the tools can be tested on simulated data.

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)

HILKER, M.; RICHTLER, T.; BARBOSA, C. E.; ARNABOLDI, M.; COCCATO, L.; DE OLIVEIRA, C. MENDES. The Hydra I cluster core II. Kinematic complexity in a rising velocity dispersion profile around the cD galaxy NGC3311. Astronomy & Astrophysics, v. 619, NOV 13 2018. Web of Science Citations: 2.

BARBOSA, C. E.; ARNABOLDI, M.; COCCATO, L.; GERHARD, O.; MENDES DE OLIVEIRA, C.; HILKER, M.; RICHTLER, T. Sloshing in its cD halo: MUSE kinematics of the central galaxy NGC 3311 in the Hydra I cluster. Astronomy & Astrophysics, v. 609, JAN 11 2018. Web of Science Citations: 6.

BARBOSA, C. E.; MENDES DE OLIVEIRA, C.; AMRAM, P.; FERRARI, F.; RUSSEIL, D.; EPINAT, B.; PERRET, V.; ADAMI, C.; MARCELIN, M. GHASP: an H alpha kinematic survey of spiral galaxies - X. Surface photometry, decompositions and the Tully-Fisher relation in the R-c band. Monthly Notices of the Royal Astronomical Society, v. 453, n. 3, p. 2965-2981, NOV 1 2015. Web of Science Citations: 5.