Star formation history, dust attenuation and extragalactic background light

Understand

At any given epoch, the Extragalactic Background Light (EBL) carries imprints of integrated star formation activities in the universe till that epoch.

• On the other hand, in order to estimate the EBL, when direct observations are not possible, one requires an accurate estimation of the star formation rate density (SFRD) and the dust attenuation ($A_\nu$) in galaxies.
• Here, we present a 'progressive fitting method' that determines global average SFRD($z$) and $A_\nu(z)$ for any given extinction curve by using the available multi-wavelength multi-epoch galaxy luminosity function measurements.
• Using the available observations, we determine the best fitted combinations of SFRD($z$) and $A_\nu(z)$, in a simple fitting form, up to $z\sim8$ for five well known extinction curves.