Bibcode
Colombo, D.; Kalinova, V.; Utomo, D.; Rosolowsky, E.; Bolatto, A. D.; Levy, R. C.; Wong, T.; Sanchez, S. F.; Leroy, A. K.; Ostriker, E.; Blitz, L.; Vogel, S.; Mast, D.; García-Benito, R.; Husemann, B.; Dannerbauer, H.; Ellmeier, L.; Cao, Y.
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 475, Issue 2, p.1791-1808
Fecha de publicación:
4
2018
Número de citas
53
Número de citas referidas
50
Descripción
We present a kpc-scale analysis of the relationship between the
molecular depletion time (τ^mol_dep) and the orbital time
(τorb) across the field of 39 face-on local galaxies,
selected from the EDGE-CALIFA sample. We find that, on average, 5 per
cent of the available molecular gas is converted into stars per orbital
time, or τ^mol_dep˜ 20 τ_orb. The resolved relation shows
a scatter of ˜0.5 dex. The scatter is ascribable to galaxies of
different morphologies that follow different
τ^mol_dep-τorb relations which decrease in steepness
from early- to late types. The morphologies appear to be linked with the
star formation rate surface density, the molecular depletion time, and
the orbital time, but they do not correlate with the molecular gas
content of the galaxies in our sample. We speculate that in our
molecular gas rich, early-type galaxies, the morphological quenching (in
particular the disc stabilization via shear), rather than the absence of
molecular gas, is the main factor responsible for their current
inefficient star formation.
Proyectos relacionados
Gas Molecular y Polvo en Galacias através del Tiempo Cósmico
Dos cuestiones fundamentales en la Astrofísica son la conversión de gas molecuar en estrellas y cómo este proceso físico depende del entorno en todas las escalas, desde sistemas planetarios, cúmulos estelares, galaxias hasta cúmulos de galaxias. El objectivo principal de este proyecto es el de estudiar la formación y evolución de galaxias a partir
Helmut
Dannerbauer