Gas accretion from the cosmic web feeding disk galaxies

Sanchez Almeida, J.; Olmo-Garcia, A.; Elmegreen, B. G.; Munoz-Tunon, C.; Elmegreen, D. M.; Filho, M. E.; Perez-Montero, E.; Amorin, R.; DePaz, AG; Knapen, JH; Lee, JC

Abstract

Disk galaxies in cosmological numerical simulations grow by accreting gas from the cosmic web. This gas reaches the external disk, and then spirals in dragged along by tidal forces and/or disk instabilities. The importance of gas infall is as clear from numerical simulations as it is obscure to observations. Extremely metal poor (XMP) galaxies seem to be the best example we have of the gas accretion process at work. They have large off-center starbursts which show significant metallicity drop compared with the host galaxy. This observation is naturally explained as a gas accretion event caught in the act. We present preliminary results of the kinematical properties of the metal poor starbursts in XMPs, which suggest that the starbursts are kinematically decoupled entities within the host galaxy.

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Título según WOS: ID WOS:000456234800070 Not found in local WOS DB
Título de la Revista: YOUNG STARS PLANETS NEAR THE SUN
Volumen: 11
Número: S321
Editorial: CAMBRIDGE UNIV PRESS
Fecha de publicación: 2017
Página de inicio: 208
Página final: 210
DOI:

10.1017/S1743921316008863

Notas: ISI