Matches in SemOpenAlex for { <https://semopenalex.org/work/W1747469955> ?p ?o ?g. }
Showing items 1 to 77 of
77
with 100 items per page.
- W1747469955 abstract "The latest cosmological N-body simulations find two intriguing properties for dark matter haloes: (1) their radial density profile, rho, is better fit by a form that flattens to a constant at the halo center (the Einasto profile) than the widely-used NFW form; (2) the radial profile of the pseudo-phase-space density, rho/sigma3, on the other hand, continues to be well fit by a power law, as seen in earlier lower-resolution simulations. In this paper we use the Jeans equation to argue that (1) and (2) cannot both be true at all radii. We examine the implied radial dependence of rho/sigma3 over 12 orders of magnitude in radius by solving the Jeans equation for a broad range of input rho and velocity anisotropy beta. Independent of beta, we find that rho/sigma3 is approximately a power law only over the limited range of halo radius resolvable by current simulations (down to ~0.1% of the virial radius), and rho/sigma3 deviates significantly from a power-law below this scale for both the Einasto and NFW rho. The same conclusion also applies to a more general density-velocity relation rho/sigma_D^epsilon. Conversely, when we enforce rho/sigma^3 r^{-eta} as an input, none of the physically allowed rho (occurring for the narrow range 1.8<eta<1.9444) follows the Einasto form. We expect the next generation simulations with better spatial resolution to settle the debate: either the Einasto profile will continue to hold and rho/sigma3 will deviate from a power law, or rho/sigma3 will continue as a power law and rho will deviate from its current parameterizations." @default.
- W1747469955 created "2016-06-24" @default.
- W1747469955 creator A5049426529 @default.
- W1747469955 creator A5071672663 @default.
- W1747469955 creator A5085422473 @default.
- W1747469955 date "2009-07-17" @default.
- W1747469955 modified "2023-10-16" @default.
- W1747469955 title "Is the Radial Profile of the Phase-Space Density of Dark Matter Halos a Power-Law?" @default.
- W1747469955 cites W1678900085 @default.
- W1747469955 cites W2341283081 @default.
- W1747469955 hasPublicationYear "2009" @default.
- W1747469955 type Work @default.
- W1747469955 sameAs 1747469955 @default.
- W1747469955 citedByCount "1" @default.
- W1747469955 countsByYear W17474699552014 @default.
- W1747469955 crossrefType "posted-content" @default.
- W1747469955 hasAuthorship W1747469955A5049426529 @default.
- W1747469955 hasAuthorship W1747469955A5071672663 @default.
- W1747469955 hasAuthorship W1747469955A5085422473 @default.
- W1747469955 hasConcept C105795698 @default.
- W1747469955 hasConcept C121332964 @default.
- W1747469955 hasConcept C159249277 @default.
- W1747469955 hasConcept C178635117 @default.
- W1747469955 hasConcept C184665706 @default.
- W1747469955 hasConcept C189549420 @default.
- W1747469955 hasConcept C2778049214 @default.
- W1747469955 hasConcept C33923547 @default.
- W1747469955 hasConcept C37914503 @default.
- W1747469955 hasConcept C38652104 @default.
- W1747469955 hasConcept C41008148 @default.
- W1747469955 hasConcept C44870925 @default.
- W1747469955 hasConcept C62520636 @default.
- W1747469955 hasConcept C85725439 @default.
- W1747469955 hasConcept C87040749 @default.
- W1747469955 hasConcept C98444146 @default.
- W1747469955 hasConceptScore W1747469955C105795698 @default.
- W1747469955 hasConceptScore W1747469955C121332964 @default.
- W1747469955 hasConceptScore W1747469955C159249277 @default.
- W1747469955 hasConceptScore W1747469955C178635117 @default.
- W1747469955 hasConceptScore W1747469955C184665706 @default.
- W1747469955 hasConceptScore W1747469955C189549420 @default.
- W1747469955 hasConceptScore W1747469955C2778049214 @default.
- W1747469955 hasConceptScore W1747469955C33923547 @default.
- W1747469955 hasConceptScore W1747469955C37914503 @default.
- W1747469955 hasConceptScore W1747469955C38652104 @default.
- W1747469955 hasConceptScore W1747469955C41008148 @default.
- W1747469955 hasConceptScore W1747469955C44870925 @default.
- W1747469955 hasConceptScore W1747469955C62520636 @default.
- W1747469955 hasConceptScore W1747469955C85725439 @default.
- W1747469955 hasConceptScore W1747469955C87040749 @default.
- W1747469955 hasConceptScore W1747469955C98444146 @default.
- W1747469955 hasLocation W17474699551 @default.
- W1747469955 hasOpenAccess W1747469955 @default.
- W1747469955 hasPrimaryLocation W17474699551 @default.
- W1747469955 hasRelatedWork W1630006135 @default.
- W1747469955 hasRelatedWork W1840236793 @default.
- W1747469955 hasRelatedWork W1851559426 @default.
- W1747469955 hasRelatedWork W1974155387 @default.
- W1747469955 hasRelatedWork W2005106835 @default.
- W1747469955 hasRelatedWork W2101945443 @default.
- W1747469955 hasRelatedWork W2103100915 @default.
- W1747469955 hasRelatedWork W2122592783 @default.
- W1747469955 hasRelatedWork W2307368923 @default.
- W1747469955 hasRelatedWork W2949505012 @default.
- W1747469955 hasRelatedWork W2963425861 @default.
- W1747469955 hasRelatedWork W3100110286 @default.
- W1747469955 hasRelatedWork W3100157323 @default.
- W1747469955 hasRelatedWork W3103086790 @default.
- W1747469955 hasRelatedWork W3103722018 @default.
- W1747469955 hasRelatedWork W3122576044 @default.
- W1747469955 hasRelatedWork W3126194174 @default.
- W1747469955 hasRelatedWork W3174526130 @default.
- W1747469955 hasRelatedWork W94003295 @default.
- W1747469955 isParatext "false" @default.
- W1747469955 isRetracted "false" @default.
- W1747469955 magId "1747469955" @default.
- W1747469955 workType "article" @default.