Lensing substructure quantification in RXJ1131-1231: a 2 keV lower bound on dark matter thermal relic mass
نویسندگان
چکیده
منابع مشابه
Dark Matter Substructure in Lensing Galaxies
To set useful limits on the abundance of small-scale dark matter halos (subhalos) in a galaxy scale, we have carried out mid-infrared imaging and integral-field spectroscopy for a sample of quadruple lens systems showing anomalous flux ratios. These observations using Subaru have been successful for distinguishing millilensing by subhalos from microlensing by stars. Current status for our lensi...
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We point out that thermal relic abundance of the dark matter is strongly altered by a non-perturbative effect called the Sommerfeld enhancement, when constituent particles of the dark matter are non-singlet under the SU(2)L gauge interaction and much heavier than the weak gauge bosons. Typical candidates for such dark matter particles are the heavy winoand higgsino-like neutralinos. We investig...
متن کاملLensing Optical Depths for Substructure and Isolated Dark Matter Halos
Multiply-imaged quasar lenses can be used to constrain the substructure mass fraction in galaxysized dark matter halos via anomalous flux ratios in lensed images. The flux ratios, however, can be affected by both the substructure in the lens halo and by isolated small-mass halos along the entire line-of-sight to the lensed source. While lensing by dark matter clumps near the lens galaxy is more...
متن کاملLensing Optical Depth for Substructure and Isolated Dark Matter Halos
Multiple-image quasar lenses can be used to constrain the substructure mass fraction in galaxy-sized dark matter halos via anomalous flux ratios of lensed images. The flux ratios, however, can be affected by both the substructure in the lens halo and by isolated small-mass halos along the entire line-ofsight to the lensed source. While lensing by dark matter clumps near the lens galaxy is more ...
متن کاملImpact of Dark Matter Substructure on the Matter and Weak Lensing Power Spectra
We explore the effect of substructure in dark matter halos on the power spectrum and bispectrum of matter fluctuations and weak lensing shear. By experimenting with substructure in a cosmological N = 5123 simulation, we find that when a larger fraction of the host halo mass is in subhalos, the resulting power spectrum has less power at 1 . k . 100h Mpc−1 and more power at k & 100h Mpc−1. We exp...
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ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2017
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2017/05/037