Effect of Star Formation and Feedback on the Mass of galaxies
Abstract
We investigate the effect of star formation and feedback on the mass of galaxies. Thoul and Weinberg (1995,1996)(hereafter TW) have investigated the mass that can cool within Hubble time, using one dimensional, spherically symmetric, hydrodynamics / gravity code. Their calculations include radiative cooling and photo-ionization. TW indicate that the photo-ionization can explain the minimum mass of galaxies. On the other hand, they conclude that the maximum mass of galaxies cannot be explained due to the effect of radiative cooling only. They have shown that the larger mass collapse, the larger mass can cool. Since the virial temperature is high, the cooling is dominated by free-free transitions. However, in this model the star formation and the feedback are ignored. If the star formation is efficient, the supernovae input energy to the surrounding gas. This energy may prevent more accretion of gas. We simulate the radiative cooling in the gas and feedback on the same initial condition with TW to study the mass that can cool within Hubble time.
- Publication:
-
IAU Joint Discussion
- Pub Date:
- 1997
- Bibcode:
- 1997IAUJD...2E..52K