Primordial black holes (PBHs) could provide the dark matter but a variety of constraints restrict the possible mass windows to $10^{16} - 10^{17}$g, $10^{20} - 10^{24}$g and $10 - 10^3M_{\\\odot}$. The last possibility is of special interest in view of the recent detection...
Primordial black holes (PBHs) are expected to accrete particle dark matter around them to form ultracompact minihalos (UCMHs), if the PBHs themselves do not make up most of the dark matter. We show that if most dark matter is a thermal relic, then the inner regions of UCMHs around PBHs...
Gravitational Decoherence with Applications to Dark Matter Phenomenology 51分钟 882播放 Spherically Symmetric Scalar Hair for Charged Black Holes a counter example of scalar no-hair theorem - 1时8分 1357播放 An overview of quantum chaos 2时14分 2536播放 高温微纳颗粒动力学 1时35分 3474播放 引力波...
We consider the possibility that massive primordial black holes are the dominant form of dark matter. Black hole formation adds a Poisson noise to the matter density fluctuations. We use Lyα forest observations to constrain this Poisson term, which constrains the black hole masses to be less tha...
A broad range of single field models of inflation are analyzed in light ofall relevant recent cosmological data, checking whether they can lead to theformation of long--lived Primordial Black Holes (PBHs) as candidate for darkmatter. To that end we calculate the spectral index of the power ...
Dark matter is often interpreted as elemen-tary particles or primordial black holes. Different productionmechanismswereproposedtoexplainthedarkmattergenesis.Inthe context of elementary particles, the most appealing non-gravitational dark matter production is the thermal freeze-out(see e.g. [5] for a ...
Twitter Google Share on Facebook primordial black holes [prī′mȯrd·ē·əl ′blak ′hōlz] (astronomy) Hypothetical black holes which may have formed in the early, highly compressed stages of the universe immediately following the big bang. ...
But recently, as other dark matter theories have turned up empty, some researchers have given the PBH notion a second look. If PBHs are out there though, they have to be very old. In the modern universe, there are only two known methods for creating new black holes from normal matter: ...
The possibility that dark matter particles could be constituted by extreme regular primordial black holes is discussed. Extreme black holes have zero surface temperature, and are not subjected to the Hawking evaporation process. Assuming that the common horizon radius of these black holes is fixed by...
Primordial black holes (PBH), if survive to the present time, can be a fraction, or even the dominant form of dark matter of the Universe. If PBH evaporate before the present time, rare forms of dark matter like superweakly interacting or supermassive particles can be produced in the course...