Weak‐lensing Detection atz∼ 1.3: Measurement of the Two Lynx Clusters with the Advanced Camera for Surveys | Zendy

M. James Jee | Zendy; R. L. White | Zendy; H. C. Ford | Zendy; G. D. Illingworth | Zendy; John P. Blakeslee | Zendy; B. Holden | Zendy; S. Mei | Zendy

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Weak‐lensing Detection atz∼ 1.3: Measurement of the Two Lynx Clusters with the Advanced Camera for Surveys

Author(s) -

M. James Jee,

R. L. White,

H. C. Ford,

G. D. Illingworth,

John P. Blakeslee,

B. Holden,

S. Mei

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/501427

Subject(s) - physics , surface brightness , astrophysics , weak gravitational lensing , galaxy , radius , advanced camera for surveys , star formation , redshift , computer security , computer science

(Abridged) We present a HST/ACS weak-lensing study of RX J0849+4452 and RXJ0848+4453, the two most distant (at z=1.26 and z=1.27, respectively) clustersyet measured with weak-lensing. The two clusters are separated by ~4' from eachother and appear to form a supercluster in the Lynx field. Using our deep ACSF775W and F850LP imaging, we detected weak-lensing signals around both clustersat ~4 sigma levels. The mass distribution indicated by the reconstruction mapis in good spatial agreement with the cluster galaxies. From the SIS fitting,we determined that RX J0849+4452 and RX J0848+4453 have similar projectedmasses of ~2.0x10^14 solar mass and ~2.1x10^14 solar mass, respectively, withina 0.5 Mpc (~60") aperture radius.

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