Speaker
Description
Atomic gas is a key component that impacts galaxy formation and evolution over cosmic time. A number of galaxy redshift surveys have firmly established that star formation in galaxies peaks at $z \sim 1-3$, with the cosmic star formation rate density being an order of magnitude higher than in the local universe. However little is known about the neutral gas content (i.e., the fuel for the star formation) of these galaxies at this epoch. We have used the upgraded Giant Metrewave Radio Telescope to conduct a deep ($\sim 100$ hour) search for the redshifted HI 21cm emission from galaxies at $z = 0.75-1.45$ over a $2\,{\rm deg}^2$ region of the DEEP2 survey fields. We have detected the HI 21cm line emission from $z \sim 1$, by stacking $\sim 8000$ star-forming galaxies in the surveyed fields. This has allowed us to measure the average atomic gas mass and average atomic gas depletion time of star-forming galaxies at and just after the epoch of galaxy assembly.
| Wish list question? | This abstract addresses a question that does not appear in the wish list. |
|---|