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Deep imaging of AXJ2019+112: The luminosity of a ``Dark Cluster''
Benitez, N.; Broadhurst, T.; Rosati, P. et al.
1998In Paul, J.; Montmerle, T.; Aubourg, E. (Eds.) 19th Texas Symposium on Relativistic Astrophysics and Cosmology
 

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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.
Disciplines :
Space science, astronomy & astrophysics
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 - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Language :
English
Title :
Deep imaging of AXJ2019+112: The luminosity of a ``Dark Cluster''
Publication date :
01 December 1998
Event name :
19th Texas Symposium on Relativistic Astrophysics and Cosmology
Event place :
Paris, France
Event date :
du 14 décembre 1998 au 18 décembre 1998
Audience :
International
Main work title :
19th Texas Symposium on Relativistic Astrophysics and Cosmology
Editor :
Paul, J.
Montmerle, T.
Aubourg, E.
Pages :
504
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since 19 April 2010

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