Gas accretion from the cosmic web feeding disk galaxies

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Almeida, JS (Author) Other; Olmo-García, A (Author) Other; Elmegreen, BG (Author) Other; Muñoz-Tuñón, C (Author) Other; Elmegreen, DM (Author) Other; Mercedes E Filho (Author) FEUP; Pérez-Montero, E (Author) Other; Amorín, R (Author) Other

Journal

Title: Proceedings of the International Astronomical Union

Vol. 11

Pages: 208-210

ISSN: 1743-9213

Publisher: Cambridge University Press

Other information

Authenticus ID: P-00V-37N

DOI: 10.1017/s1743921316008863

Abstract (EN): <jats:title>Abstract</jats:title><jats:p>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 <jats:italic>caught in the act</jats:italic>. 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.</jats:p>

Language: English

Type (Professor's evaluation): Scientific