Astrophysics (index)about

star-formation rate stellar-mass ratio

(stellar-mass star-formation rate ratio)
(ratio between a galaxy's stellar mass and its SF rate)

The galaxy star formation rate stellar-mass ratio (or stellar-mass star-formation rate ratio depending upon how a writer wishes to deal with the ratio) is of interest in star formation history. A situation has persisted where simulations tend to show a galaxy that is twice as big generally having an absolute star forming rate (mass per unit time) that is twice as big, and that this property remains over time. Actual observation shows star-formation rates at about redshift 2 were much higher (peak star-formation epoch). What physics might cause this evolution is of interest, with the hope that improved, future simulations will generally match observations.

(galaxies,star formation,relation)