Speaker
Michael Rauch
(Carnegie Observatories)
Description
In principle, QSO absorption lines studies can provide the most sensitive approach to studying galactic in-and outflows of gas. In reality, it has remained difficult to distinguish between the two, and theoretical prejudices have often driven the interpretation of absorption line results.
I shall present recent observations of the intergalactic medium (IGM) and galaxies, partly combining absorption line measurements with observations of nebular emission, that allow us to more clearly probe the signatures of galactic accretion of gas at high redshift. We will further address the question as to what degree galaxies can establish a sphere of influence (a.k.a. the "circumgalactic medium") genuinely distinct from the general IGM.
| Wish list question? | 9. What robust observational evidence exists for gas infall and outflow? |
|---|
Author
Michael Rauch
(Carnegie Observatories)