Volume 434, Number 2, May I 2005
|Page(s)||469 - 473|
|Published online||11 April 2005|
VLT adaptive optics imaging of QSO host galaxies and their close environment at z 2.5: Results from a pilot program
INAF - Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy e-mail: firstname.lastname@example.org
2 Tuorla Observatory, University of Turku, Väisäläntie 20, 21500 Piikkiö, Finland e-mail: email@example.com
3 European Southern Observatory, 3107 Alonso de Cordova, Santiago, Chile e-mail: firstname.lastname@example.org
4 Università dell'Insubria, via Valleggio 11, 22100 Como, Italy e-mail: email@example.com
Accepted: 3 December 2004
We report on ESO–VLT near-IR adaptive optics imaging of one radio-loud (PKS 0113-283) and two radio quiet (Q 0045-3337 and Q 0101-337) quasars at . In the first case we are able to resolve the QSO and find that it is hosted by an elliptical of absolute magnitude MK = -27.6. For the other two objects no extended emission has been unambiguously detected. This result, although restricted to a single object, extends up to the finding that cosmic evolution of radio-loud quasar hosts follows the trend expected for luminous and massive spheroids undergoing passive evolution. For Q 0045-3337 our high resolution images show that it is located 1.2 arcsec from a foreground disc galaxy, which may act as a gravitational lens, since the QSO most probably lies within the galaxy Einstein radius.
Key words: galaxies: active / infrared: galaxies / galaxies: quasars: general / galaxies: evolution
© ESO, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.