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- W4366999223 abstract "We introduce an analytic surface density profile for dark matter halos that accurately reproduces the structure of simulated halos of mass $M_{rm vir} = 10^{7-11} M_odot$, making it useful for modeling line-of-sight perturbers in strong gravitational lensing models. The two-parameter function has an analytic deflection potential and is more accurate than the projected Navarro, Frenk & White (NFW) profile commonly adopted at this mass scale for perturbers, especially at the small radii of most relevant for lensing perturbations. Using a characteristic radius, $R_{-1}$, where the log slope of surface density is equal to $-1$, and an associated surface density, $Sigma_{-1}$, we can represent the expected lensing signal from line-of-sight halos statistically, for an ensemble of halo orientations, using a distribution of {em projected concentration} parameters, $mathcal{C}_{rm vir} := r_{rm vir}/ R_{-1}$. Though an individual halo can have a projected concentration that varies with orientation with respect to the observer, the range of projected concentrations correlates with the usual three-dimensional halo concentration in a way that enables ease of use." @default.
- W4366999223 created "2023-04-27" @default.
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- W4366999223 date "2023-04-21" @default.
- W4366999223 modified "2023-10-16" @default.
- W4366999223 title "An analytic surface density profile for $Lambda$CDM halos and gravitational lensing studies" @default.
- W4366999223 doi "https://doi.org/10.48550/arxiv.2304.11177" @default.
- W4366999223 hasPublicationYear "2023" @default.
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