Strong Lensing Constraints on Small-Scale Linear Power

2002/02/15 by Neal Dalal, C. S. Kochanek, Christopher S. Kochanek +2 · 1 citation
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Random lasers and scattering media #astro-ph #hep-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/0202290

revtex4, 3 pages, 2 figures, submitted to PRL

openalex publication_date 2002/02/15 · arxiv created 2002/02/16 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We place limits on the linear power spectrum on small scales (k > 50 h/Mpc) using measurements of substructure in gravitational lens galaxies. We find excellent agreement with the simplest LambdaCDM models, and in conjunction with other cosmological probes, place constraints on the neutrino mass m_nu, tilt of the primordial power spectrum n, and mass of the dark matter particle m. We find n>0.94, and for a Harrison-Zeldovich spectrum, find m_nu<0.74 eV and m>5.2 keV, at 95% confidence.

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