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Collapse Barriers and Halo Abundance: Testing the Excursion Set Ansatz
Brant Robertson, Andrey Kravtsov, Jeremy Tinker +1
Our heuristic understanding of the abundance of dark matter halos centers around the concept of a density threshold, or "barrier", for gravitational collapse. If one adopts the ans…
Extending Recovery of the Primordial Matter Power Spectrum
Jaiyul Yoo, David H. Weinberg, Jeremy L. Tinker +2
The shape of the primordial matter power spectrum Plin(k) encodes critical information on cosmological parameters. At large scales, the observable galaxy power spectrum Pobs(k) is…
Toward a halo mass function for precision cosmology: the limits of universality
Jeremy L Tinker, Andrey V Kravtsov, Anatoly Klypin +5
We measure the mass function of dark matter halos in a large set of collisionless cosmological simulations of flat LCDM cosmology and investigate its evolution at z<~2. Halos are i…