Published May 1, 2018 | Version v1
Journal article

Cored density profiles in the DARKexp model

  • 1. Dipartimento di Fisica G. Occhialini, Università Milano-Bicocca, and INFN, sezione di Milano-Bicocca, Piazza della Scienza 3, 20126 Milano (Italy)

Description

The DARKexp model represents a novel and promising attempt to solve a long standing problem of statistical mechanics, that of explaining from first principles the quasi-stationary states at the end of the collisionless gravitational collapse. The model, which yields good fits to observation and simulation data on several scales, was originally conceived to provide a theoretical basis for the 1/r cusp of the Navarro-Frenk-White profile. In this note we show that it also allows for cored density profiles that, when viewed in three dimensions, in the r→0 limit have the conical shape characteristic of the Burkert profile. It remains to be established whether both cusps and cores, or only one of the two types, are allowed beyond the asymptotic analysis of this work.

Availability note (English)

Available from http://dx.doi.org/10.1088/1475-7516/2018/05/010

Additional details

Publishing Information

Journal Title
Journal of Cosmology and Astroparticle Physics
Journal Volume
2018
Journal Issue
05
Journal Page Range
p. 010
ISSN
1475-7516

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
51061998
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Descriptors DEI
ASYMPTOTIC SOLUTIONS; COMPUTERIZED SIMULATION; DENSITY; GRAVITATIONAL COLLAPSE; STATISTICAL MECHANICS
Descriptors DEC
MATHEMATICAL SOLUTIONS; MECHANICS; PHYSICAL PROPERTIES; SIMULATION