Cluster Mass Reconstruction by a Weak Shear Field | Zendy

Keiichi Umetsu | Zendy; Masashi Tada | Zendy; Toshifumi Futamase | Zendy

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Cluster Mass Reconstruction by a Weak Shear Field

Author(s) -

Keiichi Umetsu,

Masashi Tada,

Toshifumi Futamase

Publication year - 1999

Publication title -

progress of theoretical physics supplement

Language(s) - English

Resource type - Journals

ISSN - 0375-9687

DOI - 10.1143/ptps.133.53

Subject(s) - physics , mass distribution , astrophysics , galaxy , redshift , cluster (spacecraft) , gravitational field , field (mathematics) , galaxy cluster , shear (geology) , distortion (music) , gravitation , astronomy , geology , computer science , petrology , amplifier , mathematics , optoelectronics , cmos , pure mathematics , programming language

The tidal gravitational field of galaxy clusters causes a coherent distortionof the images of background sources. Since the distribution of image distortions, namely the shear field, tracesthe local gravitational potential of a deflector, it can be used to reconstructthe two-dimensional mass distribution of clusters of galaxies. Moreover, the shear field can provide unique information on the redshiftdistribution of high-redshift galaxies. In this review we summarize recently-developed parameter-free methods ofcluster-mass reconstruction based on the shear field, and we apply amass-reconstruction method to the cluster Abell 370 at redshift 0.375.Comment: 32 pages, 6 figure

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