ORBi: Letawe Yannick - Study of quasar host galaxies combining HST/ACS images and VLT Spectroscopy

Reference : Study of quasar host galaxies combining HST/ACS images and VLT Spectroscopy


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
	To cite this reference:	http://hdl.handle.net/2268/14378

Title :	Study of quasar host galaxies combining HST/ACS images and VLT Spectroscopy
Language :	English
Author, co-author :	Letawe, Yannick [ > > ]
	Letawe, Géraldine [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
	Magain, Pierre [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Publication date :	22-Mar-2010
Main document title :	The Impact of HST on European Astronomy
Editor :	Macchetto, F. D.
Publisher :	Springer
Collection and collection volume :	Astrophysics and Space Science Proceedings
Pages :	197-201
On invitation :	No
Audience :	International
ISBN :	978-90-481-3399-4
Event name :	The impact of HST on european astronomy, 41st ESLAB symposium
Event date :	29 mai au 1 juin 2007
Event organizer :	ESA
Event place (city) :	Noordwijk
Event country :	Pays Bas
Keywords :	[en] Quasar ; HST ; Spectroscopy
Abstract :	[en] We present the results of a study of the host galaxies of a few bright low redshift quasars, based on a combination of high resolution HST/ACS images with deep VLT spectra. Using a version of the MCS deconvolution algorithm specially adapted to HST images, the light from the central point source can be efficiently removed, which allows to study the environment of the quasar down to a few hundreds of parsecs from the center. In a similar way, the spectra can be separated into a quasar contribution and a spatialy resolved slit spectrum of the host galaxy. Combinig the images and spectra allows to carry out a detailed analysis of the immediate environment of the quasar: excitation and ionisation state of the gas, dynamics... Up to now, this method has been applied to six quasars, including the peculiar HE0450-2958 for which no host galaxy could be detected.
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/14378
DOI :	10.1007/978-90-481-3400-7_35

File(s) associated to this reference

Fulltext file(s):

	File	Commentary	Version	Size	Access
Restricted access	HST_proceed_letawe.pdf		Publisher postprint	267.38 kB	Request copy

All documents in ORBi are protected by a user license.

Dspace v1.5