Abundance and mass spectrum of PBH

[koulbichok]

Hello. I'm trying to study primordial black holes for my work, but I still can't understand what are abundance and mass spectrum? Could you explain? Thanks in advance.

 

[kimbyd]

Abundance is how many there are, and mass spectrum is a measure of how abundant black holes of different masses are.

 

[koulbichok]

Abundance is how many there are, and mass spectrum is a measure of how abundant black holes of different masses are.

Yes, I know that abundance is how many there are, but it’s calculated as the integral of the Gaussian probability density and this isn’t a number of black holes. Where I am wrong

 

[kimbyd]

Yes, I know that abundance is how many there are, but it’s calculated as the integral of the Gaussian probability density and this isn’t a number of black holes. Where I am wrong

The result should be either a number or mass density. But you'll need to provide more context if you want a good answer to your question.