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

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

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.504b&link_type=abstract

Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:

Astronomy and Astrophysics

Astrophysics

Scientific paper

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)sun. The strong lens model yields a compatible value, M/L_V = 315^{+80}_{-80}h(M/L_V)sun, whereas an independent weak lensing analysis sets an upper limit of M/L_V < 440 h(M/L_V)sun. This confirms that AXJ2019+112 has a M/L ratio similar to that of z < 1 massive clusters.

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