NO OBSERVATIONAL CONSTRAINTS FROM HYPOTHETICAL COLLISIONS OF HYPOTHETICAL DARK HALO PRIMORDIAL BLACK HOLES WITH GALACTIC OBJECTS

Journal Article · Sun Nov 01 00:00:00 EDT 2009 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/705/1/659· OSTI ID:21378355

Abramowicz, Marek A; Becker, Julia K; Garzilli, Antonella; Johansson, Fredrik ^[1]; Biermann, Peter L ^[2]; Lei, Qian ^[3]

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1. Goeteborgs Universitet, Institutionen foer Fysik, SE-41296 Goeteborg (Sweden)
2. Max Planck Institut fuer Radioastronomie, Auf dem Huegel 69, D-53121 Bonn (Germany)
3. Astronomy Department, School of Physics, Peking University, Beijing 100871 (China)

It was suggested by several authors that hypothetical primordial black holes (PBHs) may contribute to the dark matter (DM) in our Galaxy. There are strong constraints based on the Hawking evaporation that practically exclude PBHs with masses m{sub pbh} approx 10{sup 15}to10{sup 16} g and smaller as significant contributors to the Galactic DM. Similarly, PBHs with masses greater than about 10{sup 26} g are practically excluded by the gravitational lensing observation. The mass range between 10{sup 16} g <m{sub pbh} < 10{sup 26} g is unconstrained. In this paper, we examine possible observational signatures in the unexplored mass range, investigating hypothetical collisions of PBHs with main-sequence stars, red giants, white dwarfs, and neutron stars in our Galaxy. This has previously been discussed as possibly leading to an observable photon eruption due to shock production during the encounter. We find that such collisions are either too rare to be observed (if the PBH masses are typically larger than about 10{sup 20} g), or produce too little power to be detected (if the masses are smaller than about 10{sup 20} g).

• OSTI ID: 21378355
• Journal Information: Astrophysical Journal, Vol. 705, Issue 1; Other Information: DOI: 10.1088/0004-637X/705/1/659; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ABUNDANCE
BLACK HOLES
COSMIC GAMMA BURSTS
ERUPTION
EVAPORATION
GALAXIES
MAIN SEQUENCE STARS
MASS
NEUTRON STARS
NONLUMINOUS MATTER
PHOTONS
UNIVERSE
WHITE DWARF STARS
BOSONS
COSMIC RADIATION
DWARF STARS
ELEMENTARY PARTICLES
IONIZING RADIATIONS
MASSLESS PARTICLES
MATTER
PHASE TRANSFORMATIONS
PRIMARY COSMIC RADIATION
RADIATIONS
STARS