The evolution of the gas fraction of quiescent galaxies modeled as a consequence of their creation rate

RAPHAEL ALEXANDRE SIMON GOBAT, G. Magdis, C. D'Eugenio, F. Valentino

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

2 Citas (Scopus)

Resumen

We discuss the evolution of the interstellar medium of quiescent galaxies, currently emerging from recent analyses, with the help of a simple model based on well-established empirical relations such as the stellar mass functions and the main sequence of star formation. This model is meant to describe observed quantities without making specific assumptions on the nature of quenching processes, but relying on their observable consequences. We find that the high gas fractions seen or suggested at high redshift in quiescent galaxies, and their apparent mild evolution at early times, can be mostly attributed to a progenitor effect where recently quenched galaxies with ∼10% gas fractions dominate the quiescent galaxy population until z ∼ 1. In the same context, the much lower gas and dust fractions measured in local early-type galaxies are interpreted as the product of the steady depletion of their interstellar medium on a ∼2 Gyr timescale, coupled with a higher fraction of more gas-exhaustive events.

Idioma originalInglés
Número de artículoL7
PublicaciónAstronomy and Astrophysics
Volumen644
DOI
EstadoPublicada - 1 dic. 2020
Publicado de forma externa

Huella

Profundice en los temas de investigación de 'The evolution of the gas fraction of quiescent galaxies modeled as a consequence of their creation rate'. En conjunto forman una huella única.

Citar esto