Advanced search
Start date
(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 role of gas infall in the evolution of disc galaxies

Full text
Molla, Mercedes ; Diaz, Ngeles I. ; Gibson, Brad K. ; Cavichia, Oscar ; Lopez-Sanchez, Angel-R.
Total Authors: 5
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 462, n. 2, p. 1329-1340, OCT 21 2016.
Web of Science Citations: 13

Spiral galaxies are thought to acquire their gas through a protracted infall phase resulting in the inside-out growth of their associated discs. For field spirals, this infall occurs in the lower density environments of the cosmic web. The overall infall rate, as well as the galactocentric radius at which this infall is incorporated into the star-forming disc, plays a pivotal role in shaping the characteristics observed today. Indeed, characterizing the functional form of this spatio-temporal infall in situ is exceedingly difficult, and one is forced to constrain these forms using the present day state of galaxies with model or simulation predictions. We present the infall rates used as input to a grid of chemical evolution models spanning the mass spectrum of discs observed today. We provide a systematic comparison with alternate analytical infall schemes in the literature, including a first comparison with cosmological simulations. Identifying the degeneracies associated with the adopted infall rate prescriptions in galaxy models is an important step in the development of a consistent picture of disc galaxy formation and evolution. (AU)

FAPESP's process: 12/22236-3 - The time/redshift evolution of radial abundance gradients
Grantee:Roberto Dell'Aglio Dias da Costa
Support type: Research Grants - Visiting Researcher Grant - International
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