ALMA resolves extended star formation in high-zAGN host galaxies

ALMA resolves extended star formation in high-z AGN host galaxies

We present high-resolution (0.3 arcsec) Atacama Large Millimeter Array (ALMA) 870 μm imaging of five z≈ 1.5–4.5 X-ray detected AGN (with luminosities of L2–8keV > 1042 erg s−1). These data provide a 20 times improvement in spatial resolution over single-dish restframe far-infrared (FIR) measurements. The sub-millimetre emission is extended on scales of FWHM ≈ 0.2 arcsec–0.5 arcsec, correspondin...

Star Formation Quenching in Quasar Host Galaxies

Galaxy evolution is likely to be shaped by negative feedback from active galactic nuclei (AGN). In the whole range of redshifts and luminosities studied so far, galaxies hosting an AGN frequently show fast and extended outflows consisting in both ionized and molecular gas. Such outflows could potentially quench the start formation within the host galaxy, but a clear evidence of negative feedbac...

Star Formation and Gas Kinematics of Quasar Host Galaxies at z~6: New Insights from ALMA

We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of the [C ii] 158μm fine structure line and dust continuum emission from the host galaxies of five redshift 6 quasars. We also report complementary observations of 250 GHz dust continuum and CO (6–5) line emission from the z = 6.00 quasar SDSS J231038.88+185519.7 using the IRAM facilities. The ALMA observations were car...

Mid-Infrared Spectroscopy of Submillimeter Galaxies: Extended Star Formation in Massive High-Redshift Galaxies

Star Formation in High Redshift Galaxies

Observations of the high redshift Universe, interpreted in the context of a new generation of computer simulated model Universes, are providing new insights into the processes by which galaxies and quasars form and evolve, as well as the relationship between the formation of virialized, star-forming systems and the evolution of the intergalactic medium. We describe our recent measurements of th...