Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-05-12
Phys.Rept. 307 (1998) 155-162
Astronomy and Astrophysics
Astrophysics
4 pages, RevTex, to appear in proceedings of DM98, Los Angeles (ed D. Cline, Elsevier)
Scientific paper
10.1016/S0370-1573(98)00067-2
Observations by the MACHO collaboration indicate that a significant fraction of the galactic halo dark matter may be in form of compact objects with masses $M\sim 0.5M_{\odot}$. Identification of these objects as red or white dwarfs is problematic due to stringent observational upper limits on such dwarf populations. Primordial black hole (PBH) formation from pre-existing density fluctuations is facilitated during the cosmic QCD transition due to a significant decrease in pressure forces. For generic initial density perturbation spectra this implies that essentially all PBHs may form with masses close to the QCD-horizon scale, $M_h^{QCD}\sim 1M_{\odot}$. It is possible that such QCD PBHs contribute significantly to the closure density today. I discuss the status of theoretical predictions for the properties of QCD PBH dark matter. Observational signatures of and constraints on a cosmic solar mass PBH population are also discussed.
No associations
LandOfFree
Could MACHOS be Primordial Black Holes formed during the QCD Epoch? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Could MACHOS be Primordial Black Holes formed during the QCD Epoch?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Could MACHOS be Primordial Black Holes formed during the QCD Epoch? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-635746