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Updated: Jul 11, 2026
07:46
Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Summary
Baryonic dark matter could be compact stellar remnants. These remnants, including neutron stars, could form observable X-ray signals in galaxy halos and clusters due to binary evolution.
Area of Science:
- Astrophysics
- Cosmology
- Particle Physics
Background:
- Dark matter constitutes a significant portion of the universe's mass, yet its nature remains elusive.
- Baryonic matter, composed of protons and neutrons, is a potential candidate for dark matter, possibly in the form of compact stellar remnants.
Purpose of the Study:
- To investigate the plausibility of baryonic dark matter being composed of compact stellar remnants.
- To explore the formation mechanisms and observable signatures of such remnants in galactic halos and clusters.
Main Methods:
- Simulated the formation of stars and compact remnants from massive Jeans mass clouds in the early universe.
- Modeled the evolution of stellar remnant clusters, including tidal disruption and binary formation via neutron star captures.
- Predicted the resulting X-ray emission signatures detectable in the present epoch.
Main Results:
- Massive Jeans clouds (10^6-10^8 solar masses) with a top-heavy initial mass function could efficiently produce neutron stars and long-lived low-mass stars.
- Tidal disruption of remnant clusters leads to neutron star captures by non-degenerate stars, forming close binaries.
- These binaries evolve to produce an observable X-ray signal associated with dark matter aggregations.
Conclusions:
- Compact stellar remnants, particularly neutron stars, are plausible baryonic dark matter candidates.
- The predicted X-ray signals from neutron star binaries offer a potential observational test for this dark matter model.
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