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Winds and feedback from supermassive black holes accreting at low rates

Grant number: 16/24857-6
Support type:Scholarships in Brazil - Master
Effective date (Start): March 01, 2017
Effective date (End): February 28, 2019
Field of knowledge:Physical Sciences and Mathematics - Astronomy
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Rodrigo Nemmen da Silva
Grantee:Ivan Carlos de Almeida
Home Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil


Quiescent galaxies with little or no ongoing star formation dominate the population of galaxies with masses above 2E10 Msun in the local universe. Once star formation has been shut down in a possible quasar phase, energy feedback in the form of outflows from a supermassive black hole (SMBH) accreting at a low rate is one of the leading candidates for heating up or removing gas accreted afterwards. However, the nature of such outflows is an unresolved question in black hole (BH) physics. The goal of this project is to perform global, multidimensional hydrodynamical and MHD simulations of radiatively inefficient accretion flows around SMBHs, in order to investigate in a self-consistent way the winds produced by the accreting black hole. We will quantify the amount of energy, momentum and mass outflow rates, characterize the geometry and collimation of wind, and the density profile of the accretion flow, which will be compared against observations. With this work, we will be able to evaluate if these BH winds provide efficient feedback inside the host galaxy. (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)
DE MENEZES, RANIERE; NEMMEN, RODRIGO; FINKE, JUSTIN D.; ALMEIDA, IVAN; RANI, BINDU. Gamma-ray observations of low-luminosity active galactic nuclei. Monthly Notices of the Royal Astronomical Society, v. 492, n. 3, p. 4120-4130, MAR 2020. Web of Science Citations: 0.
ALMEIDA, IVAN; NEMMEN, RODRIGO; WONG, KA-WAH; WU, QINGWEN; IRWIN, JIMMY A. The multiwavelength spectrum of NGC 3115: hot accretion flow properties. Monthly Notices of the Royal Astronomical Society, v. 475, n. 4, p. 5398-5402, APR 2018. Web of Science Citations: 1.

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