Complex structures in galaxy cluster fields: implications for gravitational lensing mass models
نویسندگان
چکیده
منابع مشابه
Gravitational Lensing in Galaxy Cluster Abell 1689
Synopsis In this thesis we have set out to study the galaxy cluster Abell 1689 using strong grav-itational lensing. Due to its relative closeness at redshift 0.18 and available archived deep Hubble Space Telescope imaging it presents an ideal opportunity to several diverse studies based on strong gravitational lensing. We start with a brief introduction to cosmology and general relativity as we...
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We investigate the associations between background galaxies and foreground clusters of galaxies due to the effect of gravitational lensing by clusters of galaxies. Similar to the well-known quasar-galaxy ones, these associations depend sensitively on the shape of galaxy number-magnitude or number-flux relation, and both positive and “negative” associations are found to be possible, depending on...
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Kaiser & Squires have proposed a technique for mapping the dark matter in galaxy clusters using the coherent weak distortion of background galaxy images caused by gravitational lensing. We investigate the effectiveness of this technique under controlled conditions by creating simulated CCD frames containing galaxies lensed by a model cluster, measuring the resulting galaxy shapes, and comparing...
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Measured time delays between the images of a gravitationally lensed source can lead to a determination of the Hubble constant (Ho), but only if the lensing mass distribution is well understood. The inability to sufficiently constrain galaxy mass models results in large uncertainties on the derived Ho, and severely hampers the cosmological application of this otherwise elegant method. At the sam...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society: Letters
سال: 2007
ISSN: 1745-3925,1745-3933
DOI: 10.1111/j.1745-3933.2006.00260.x