Supernovae-driven galactic winds are a key ingredient of all successful models or simulations of galaxy formation. They are notably invoked to reduce considerably the efficiency of galaxy formation in small-mass dark-matter haloes, to pollute the intergalactic medium with heavy elements, or to shut down star formation in the early progenitors of present-day elliptical galaxies. Despite their omnipresence in models, the physical mechanisms which drive large galactic outflows are still poorly understood. The sheer range of scales -- from sub-pc ISM structure to the tens of Mpc scales of the IGM, and from the thousand years expansion of a SN remnant to the tens of millions of years it takes ejecta to leave a dark matter halo --, together with the complexity of the cosmological context within which galaxies evolve, make the problem one of the hardest to tackle numerically.

Observationally, the situation is not any easier. Spectroscopic observations which constrain directly the properties of galactic outflows are rare and most often only give a very incomplete description of the kinematics of the outflowing material. Observations of absorbing systems on the sight-lines of quasars, and their statistical association to galaxies provide some constraints on the extents of winds, but the samples are still very small, and the interpretation of the data difficult. Indirect constraints then come in, mostly relying on the large multi-band photometric surveys which tell us about the integrated effect of galactic winds by constraining the faint end of the mass or luminosity functions of galaxies through cosmic time.

The workshop Galaxies and Supernovae proposes to gather observers and theoreticians working on the energetic feedback from massive stars from the perspectives of interstellar medium physics and that of galaxy formation in the cosmological context, in order to review our current understanding of Supernova feedback on galaxy formation.

Confirmed Speakers

N. Bouché, A. Cattaneo, B. Commerçon, J. Devriendt, Y. Dubois, S. Geen, E. Le Floc'h, F. Levrier, F. Renaud, J. Rosdahl, M. Stringer, R. Teyssier, A. Wofford


Deadline for registration: Oct. 11

In order to register, please send a mail to J. Blaizot and L. Michel-Dansac (see contacts) with the following information:

1. Would you like to give a presentation? We encourage you to propose a title and abstract as soon as possible. The selection will take place mid-October.

2. Will you participate to the workshop dinner on Monday evening ?

3. Do you need funding ? (We have limitted funding, which we will use in priority to help students travel).

Note that we can unfortunately not host more than about 50 participants... Please do register as soon as possible (and definitely before Oct. 11).