ORBi: Benitez N. - Deep imaging of AXJ2019+112: The luminosity of a ``Dark Cluster''

Reference : Deep imaging of AXJ2019+112: The luminosity of a ``Dark Cluster''


	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/2268/33571

Title :	Deep imaging of AXJ2019+112: The luminosity of a ``Dark Cluster''
Language :	English
Author, co-author :	Benitez, N. [Astronomy Department, UC Berkeley, 601 Campbell Hall, Berkeley 94720-3411, USA,]
	Broadhurst, T. [Astronomy Department, UC Berkeley, 601 Campbell Hall, Berkeley 94720-3411, USA]
	Rosati, P. [European Southern Observatory, D-85748, Garching, Germany]
	Courbin, F. [Institut d'Astrophysique et de Geophysique, Universite de Liege, 5, Avenue de Cointe, B-4000 Liege, Belgium and URA 173 CNRS-DAEC, Observatoire de Paris, F-92195 Meudon Principal CEDEX, France]
	Squires, G. [Astronomy Department, UC Berkeley, 601 Campbell Hall, Berkeley 94720-3411, USA]
	Lidman, C. [European Southern Observatory, D-85748, Garching, Germany]
	Magain, Pierre [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Publication date :	1-Dec-1998
Main document title :	19th Texas Symposium on Relativistic Astrophysics and Cosmology
Editor :	Paul, J.
	Montmerle, T.
	Aubourg, E.
Pages :	504
On invitation :	No
Audience :	International
Event name :	19th Texas Symposium on Relativistic Astrophysics and Cosmology
Event date :	du 14 décembre 1998 au 18 décembre 1998
Event place (city) :	Paris
Event country :	France
Abstract :	[en] We detect a distant cluster of galaxies at z ~1 centered on the QSO lens and luminous X-ray source AXJ2019+112 (Hattori et al 1997). The mass-to-light ratio within an aperture of 0.4 h ^{-1}Mpc determined using the X-ray temperature is M_x / L_V = 190^{+95}_{-66}h(M/L_V)[SUB]sun[/SUB]. The strong lens model yields a compatible value, M/L_V = 315^{+80}_{-80}h(M/L_V)[SUB]sun[/SUB], whereas an independent weak lensing analysis sets an upper limit of M/L_V < 440 h(M/L_V)[SUB]sun[/SUB]. This confirms that AXJ2019+112 has a M/L ratio similar to that of z < 1 massive clusters.
Permalink :	http://hdl.handle.net/2268/33571
Other URL :	http://adsabs.harvard.edu/abs/1998tx19.confE.504B

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