Dark matter with two- and many-body decays and supernovae type Ia

被引：35

作者：

Blackadder, Gordon ^{[1
]}

Koushiappas, Savvas M. ^{[1
]}

机构：

[1] Brown Univ, Dept Phys, Providence, RI 02912 USA

来源：

PHYSICAL REVIEW D | 2014年 / 90卷 / 10期

基金：

美国国家科学基金会;

关键词：

GAMMA-RAYS; NEUTRINOS; SPECTRUM; CLUSTER; MODEL;

D O I：

10.1103/PhysRevD.90.103527

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a decaying dark matter scenario where the daughter products are a single massless relativistic particle and a single, massive but possibly relativistic particle. We calculate the velocity distribution of the massive daughter particle and its associated equation of state and derive its dynamical evolution in an expanding universe. In addition, we present a model of decaying dark matter where there are many massless relativistic daughter particles together with a massive particle at rest. We place constraints on these two models using supernovae type Ia observations. We find that for a daughter relativistic fraction of 1% and higher, lifetimes of at least less than 10 Gyrs are excluded, with larger relativistic fractions constraining longer lifetimes.

引用

页数：10

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