ORBi: Borguet Benoît - New Insights into the Quasar Type 1/Type 2 Dichotomy from Correlations between Quasar Host Orientation and Polarization

Reference : New Insights into the Quasar Type 1/Type 2 Dichotomy from Correlations between Quasar Ho...


	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/2268/5158

Title :	New Insights into the Quasar Type 1/Type 2 Dichotomy from Correlations between Quasar Host Orientation and Polarization
Language :	English
Author, co-author :	Borguet, Benoît [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
	Hutsemekers, Damien [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)]
	Letawe, Géraldine [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
	Letawe, Yannick [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
	Magain, Pierre [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image]
Publication date :	1-Nov-2011
Main document title :	Astronomical Polarimetry 2008: Science from Small to Large Telescopes. ASPC 449
Editor :	Bastien, Pierre
Collection and collection volume :	ASP Conference Series, Astronomical Society of the Pacific, 2012., Vol. 449
Pages :	459-460
Audience :	International
Event name :	Astronomical Polarimetry 2008: Science from Small to Large Telescopes.
Event date :	6-11 July 2008
Event place (city) :	Quebec
Event country :	Canada
Keywords :	[en] quasar ; unification model
Abstract :	[en] We investigate correlations between the direction of the optical linear polarization and the orientation of the host galaxy/extended emission for type 1 and type 2 radio-loud and radio-quiet quasars. We have used high resolution Hubble Space Telescope data and a deconvolution process to obtain a good determination of the host galaxy/extended emission (EE) position angle. With these new measurements and a compilation of data from the literature, we find a significant correlation, different for type 1 and type 2 objects, between the linear polarization position angle and the orientation of the EE, suggesting scattering by an extended UV/blue region in both types of objects. Our observations support the extension of the Unification Model to the higher luminosity AGNs like the quasars, assuming a two component scattering model.
Funders :	Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture (Communauté française de Belgique) - FRIA
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/5158
Other URL :	http://adsabs.harvard.edu/abs/2011ASPC..449..459B
Commentary :	eprintid: arXiv:0809.4539

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