Gravitational lensing detection of an extremely dense environment around a galaxy cluster
نویسندگان
چکیده
منابع مشابه
Galaxy-cluster associations from gravitational lensing
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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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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In this review, I discuss the use of galaxy-galaxy weak lensing measurements to study the masses of dark matter halos in which galaxies reside. After summarizing how weak gravitational lensing measurements can be interpreted in terms of halo mass, I review measurements that were used to derive the relationship between optical galaxy mass tracers, such as stellar mass or luminosity, and dark mat...
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ژورنال
عنوان ژورنال: Nature Astronomy
سال: 2018
ISSN: 2397-3366
DOI: 10.1038/s41550-018-0508-y