Constraints on self-interacting Bose-Einstein condensate dark matter using large-scale observables

被引：12

作者：

Hartman, S. T. H. ^{[1
]}

Winther, H. A. ^{[1
]}

Mota, D. F. ^{[1
]}

机构：

[1] Univ Oslo, Inst Theoret Astrophys, POB 1029, N-0315 Oslo, Norway

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2022年 / 02期

关键词：

cosmological parameters from CMBR; cosmological parameters from LSS; dark matter theory; GALAXIES; UNIVERSE; MODEL;

D O I：

10.1088/1475-7516/2022/02/005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Constraints on the cosmic history of self-interacting Bose-Einstein condensed (SIBEC) dark matter (DM) are obtained using the cosmic microwave background (CMB), baryonic acoustic oscillations (BAO), growth factor measurements, and type Ia supernovae (SNIa) distances. Four scenarios are considered, one with purely SIBEC-DM, and three in which SIBEC-DM is the final product of some transition from different initial states, which are either cold, warm, or has a constant equation of state. Using a fluid approximation for the self-interacting scalar field it is found that in the simplest scenario of purely SIBEC-DM the self-interaction necessary for solving the cusp-core problem, with core-radii of low-mass halos of order R-c greater than or similar to 1kpc, is excluded at 2.4 sigma, or 98.5% confidence. Introducing a transition, however, relaxes this constraint, but the transitions are preferred to be after matter-radiation equality, and the initial phase to be cold.

引用

页数：29

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