Freeze-in dark matter perturbations are adiabatic

被引：4
|
作者：
Racco, D. [1 ]
Riotto, A. [2 ,3 ]
机构：
[1] Stanford Univ, Stanford Inst Theoret Phys, 382 Via Pueblo, Stanford, CA 94305 USA
[2] Dept Theoret Phys, 24 Quai E Ansermet, CH-1211 Geneva 4, Switzerland
[3] Gravitat Wave Sci Ctr, 24 Quai E Ansermet, CH-1211 Geneva 4, Switzerland
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2023年 / 01期
关键词：
physics of the early universe; cosmological perturbation theory; dark matter theory;
D O I：
10.1088/1475-7516/2023/01/020
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We show that the large-scale perturbations in the dark matter generated by the freeze-in mechanism are only of adiabatic nature. The freeze-in mechanism is not at odds with the current stringent constraints on isocurvature perturbations.
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页数：9
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