The Surprisingly Steep Mass Profile of A1689, from a Lensing Analysis of Subaru Images
نویسندگان
چکیده
منابع مشابه
The Surprisingly Steep Mass Profile of Abell 1689, from a Lensing Analysis of Subaru Images1
Subaru observations of A1689 (z = 0.183) are used to derive an accurate, model-independent mass profile for the entire cluster, r < ∼ 2Mpc/h, by combining magnification bias and distortion measurements. The projected mass profile steepens quickly with increasing radius, falling away to zero at r ∼ 1.0Mpc/h, well short of the anticipated virial radius. Our profile accurately matches onto the inn...
متن کاملStrong lensing analysis of A1689 from deep ACS images
ACS observations of massive lensing clusters permit an order of magnitude increase in the numbers of multiply-lensed background galaxies identified behind a given cluster. We have developed a code to take the pixels belonging to any given image and generate counter-images with full resolution, so that multiple systems are convincingly and exhaustively identified. Over 130 images of 35 multiply ...
متن کاملCan the Steep Mass Profile of A1689 Be Explained by a Triaxial Dark Halo?1
The steep mass profile of A1689 derived from recent detailed lensing observations is not readily reconciled with the low concentration halos predicted by the standard cold dark matter (CDM) model. However, halo triaxiality may act to bias the profile constraints derived assuming a spherically symmetric mass distribution, since lensing relates only to the projected mass distribution. A degree of...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2005
ISSN: 0004-637X,1538-4357
DOI: 10.1086/428122