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Limits on the cosmological abundance of supermassive compact objects from a millilensing search in gamma-ray burst data

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arxiv astro-ph/0101488 v1 pith:UGMMTAUZ submitted 2001-01-26 astro-ph

Robert J. Nemiroff (Michigan Tech) , Gabriela F. Marani (NASA/NRC) , Jay P. Norris (NASA/GSFC) & Jerry T. Bonnell (NASA/USRA) This is my paper · ORCID
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keywords compactcosmologicaldatadensitygamma-raylimitsmassmillilensing
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abstract

A new search for the gravitational lens effects of a significant cosmological density of supermassive compact objects (SCOs) on gamma-ray bursts has yielded a null result. We inspected the timing data of 774 BATSE-triggered GRBs for evidence of millilensing: repeated peaks similar in light-curve shape and spectra. Our null detection leads us to conclude that, in all candidate universes simulated, $\Omega_{SCO} < 0.1$ is favored for $10^5 < M_{SCO}/M_{\odot} < 10^9$, while in some universes and mass ranges the density limits are as much as 10 times lower. Therefore, a cosmologically significant population of SCOs near globular cluster mass neither came out of the primordial universe, nor condensed at recombination.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 52 citations worldwide. Full citation record

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    hep-ph 2025-01 conditional novelty 7.0 of 10

    Gravitational-wave diffractive lensing, combined statistically across many events, can map the small-scale matter power spectrum through a new frequency-to-scale relation.

  2. Evidence for Intermediate-Mass Black Holes From Microlensing Signatures in CHIME/FRB catalog 2

    astro-ph.HE 2026-05 unverdicted novelty 6.0 of 10

    Two FRBs in the CHIME/FRB catalog look microlensed by black holes of roughly 550 and 2000 solar masses, presented as IMBH candidates.

  3. Constraints on Primordial Black Holes

    astro-ph.CO 2020-02 accept novelty 4.0 of 10

    Updated compilation shows PBHs are tightly constrained across 55 orders of magnitude in mass, ruling out dominant dark matter contributions except in narrow windows, with many limits carrying observational uncertainties.

  4. Primordial Black Holes as Dark Matter: Recent Developments

    astro-ph.CO 2020-06 unverdicted novelty 3.0 of 10

    Primordial black holes in specific mass ranges could account for some or all dark matter while resolving structure-formation and seed problems in standard cosmology.

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