VLT adaptive optics imaging of QSO at z similar to 2.5

: Falomo R, Kotilainen J, Scarpa R, Treves A

: 2005

Growing Black Holes: Accretion in a Cosmological Context

: ESO ASTROPHY SYMP

: 130

: 131

: 2

: 3-540-25275-4

DOI: https://doi.org/10.1007/11403913_18

We report on ESO-VLT near-IR adaptive optics imaging of one radio-loud and two radio quiet quasars at z > 2. In the first case we are able to resolve the QSO and find that it is hosted by an elliptical of M-K = -27.6. This result, though restricted to a single object, extends up to z=2.5 the finding that cosmic evolution of radio-loud hosts follows the trend expected for luminous and massive spheroids undergoing passive evolution.