VLT adaptive optics imaging of QSO host galaxies and their close environment at z ˜ 2.5: Results from a pilot program

Bibcode
2005A&A...434..469F
DOI
10.1051/0004-6361:20041894
Falomo, R.; Kotilainen, J. K.; Scarpa, R.; Treves, A.
Bibliographical reference

Astronomy and Astrophysics, Volume 434, Issue 2, May I 2005, pp.469-473

Advertised on:
5
2005
Journal
Astronomy and Astrophysics
Number of authors
4
IAC number of authors
0
Citations
30
Refereed citations
25
Description
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 z > 2. 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 z=2.5 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 K=17.5 foreground disc galaxy, which may act as a gravitational lens, since the QSO most probably lies within the galaxy Einstein radius.
Type
Refereed
Galaxies
Quasars

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