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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The fate of the gaseous discs of galaxies that fall into clusters

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Author(s):
Ruggiero, Rafael ; Lima Neto, Gastao B.
Total Authors: 2
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 468, n. 4, p. 4107-4115, JUL 2017.
Web of Science Citations: 13
Abstract

Galaxy clusters are known to induce gas loss in infalling galaxies due to the ram pressure exerted by the intracluster medium over their gas content. In this paper, we investigate this process through a set of simulations of Milky Way like galaxies falling inside idealized clusters of 10(14) and 10(15) M-circle dot, containing a cool core or not, using the adaptive mesh refinement code RAMSES. We use these simulations to constrain how much of the initial mass contained in the gaseous disc of the galaxy will be converted into stars and how much of it will be lost, after a single crossing of the entire cluster. We find that, if the galaxy reaches the central region of a cool-core cluster, it is expected to lose all its gas, independently of its entry conditions and of the cluster's mass. On the other hand, it is expected to never lose all its gas after crossing a cluster without a cool core just once. Before reaching the centre of the cluster, the star formation rate (SFR) of the galaxy is always enhanced, by a factor of 1.5-3. If the galaxy crosses the cluster without being completely stripped, its final amount of gas is on average two times smaller after crossing the 1015 M-circle dot cluster, relative to the 1014 M-circle dot cluster. This is reflected in the final SFR of the galaxy, which is also two times smaller in the former, ranging from 0.5 to 1 M-circle dot yr(-1), compared to 1-2 M-circle dot yr(-1) for the latter. (AU)

FAPESP's process: 09/54006-4 - A computer cluster for the Astronomy Department of the University of São Paulo Institute of Astronomy, Geophysics and Atmospheric Sciences and for the Cruzeiro do Sul University Astrophysics Center
Grantee:Elisabete Maria de Gouveia Dal Pino
Support type: Multi-user Equipment Program
FAPESP's process: 15/13141-7 - Galactic evolution in clusters
Grantee:Rafael Ruggiero
Support type: Scholarships in Brazil - Doctorate (Direct)