Skip to main content
SearchLogin or Signup

Clearing Gas from Galaxies with AGN

Published onJun 01, 2020
Clearing Gas from Galaxies with AGN

We have used targeted ALMA observations of SCUBA-2 sources to detect 75 >4.5-σ 850 micron sources in 100 square arcminutes of the Chandra Deep Field-South, by far the highest density sample of faint 850 micron sources yet obtained. The observed region matches the deepest portion of the 7 Ms Chandra image, making it possible to probe low-luminosity AGN at very high redshifts. We find that most of the ALMA sources appear to be consistent with having both their X-ray and submm emission driven by star formation. Indeed, only 20% of the ALMA sources have intermediate X-ray luminosities (rest-frame 8–28 keV luminosities of 1042.5-1044 erg/s), and none has a high X-ray luminosity (>1044 erg/s). Conversely, we find extreme star formation rates (>300 solar masses per year) in some intermediate X-ray luminosity sources, but not in any high X-ray luminosity sources. I will discuss how our results seem to be consistent with gas clearing from the galaxies.


No comments here