Slit and integral-field optical spectroscopy of the enigmatic quasar HE0450-2958

Details Slit and integral-field optical spectroscopy of the enigmatic quasar HE0450-2958 Slit and integral-field optical spectroscopy of the enigmatic quasar HE0450-2958

2007-09-24

arxiv.org/abs/0709.3743v2

Astron.Astrophys.480:69,2008

Astronomy and Astrophysics

Astrophysics

9 pages, 13 figures, in press in A&A

Scientific paper

10.1051/0004-6361:20078725

Interest in the quasar HE0450-2958 arose following the publication of the non-detection of its expected massive host, leading to various interpretations. This article investigates the gaseous and stellar contents of the system through additional VLT/FORS slit spectra and integral field spectroscopy from VLT/VIMOS. We apply our MCS deconvolution algorithm on slit spectra for the separation of the QSO and diffuse components, and develop a new method to remove the point sources in Integral Field Spectra, allowing extraction of velocity maps, narrow-line images, spatially resolved spectra or ionization diagrams of the surroundings of HE0450-2958. The whole system is embedded in gas, mostly ionized by the QSO radiation field and shocks associated with radio jets. The observed gas and star dynamics are unrelated, revealing a strongly perturbed system. Despite longer spectroscopic observations, the host galaxy remains undetected.

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