Le 22 décembre 2017
De 10h30 à 12h00

Max Gronke UC Santa Barbara   The Lyman-alpha (Lya) of neutral hydrogen is the most prominent...

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Gas dynamics and star formation in dwarf galaxies

Le 12 mai 2017
De 10h30 à 12h00

Federico Lelli

ESO Garching

 

The formation and evolution of low-mass galaxies remain poorly understood. It is still unclear what physical processes are driving the star formation in these low-density systems and what are the actual effects of stellar feedback and gas outflows in their shallow potential wells. I will present several results on nearby, gas-rich, low-mass galaxies from a multi-wavelength campaign, including interferometric HI data, HST imaging, and recent MUSE and ALMA observations. I will focus on two key classes of low-mass objects: (1) starburst dwarfs that are experiencing unusually high levels of star-formation activity, and (2) tidal dwarfs that are forming out of collisional debris around interacting/merging galaxies. I will discuss our current view on the evolution of these systems and the implications for galaxy formation theories in LCDM.

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