Constraining the Cosmic Abundance of Stellar Remnants with Multi-T[CLC]e[/CLC]V Gamma Rays
Open Access
- 20 September 1999
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 523 (1) , L77-L80
- https://doi.org/10.1086/312243
Abstract
If stellar remnants are cosmologically significant, the infrared flux from the remnant progenitors would contribute to the opacity of multi-TeV γ-rays. The multi-TeV γ-ray horizon is established to be at a redshift z > 0.034 by the observation of the blazar Mrk 501. By requiring that the optical depth due to γγ → e+e- be less than 1 for a source at z = 0.034, we limit the cosmological density of stellar remnants, Ωrm ≤ (2-4) × 10-3 h (h70 is the Hubble constant in units of 70 km s-1 Mpc-1), and thus strongly constrain stellar remnants as a cosmologically significant source of dark matter.Keywords
All Related Versions
This publication has 32 references indexed in Scilit:
- Is Galactic Dark Matter White?The Astrophysical Journal, 1999
- Massive compact halo objects viewed from a cosmological perspective: contribution to the baryonic mass density of the universeNew Astronomy, 1998
- How uncertain are solar neutrino predictions?Physics Letters B, 1998
- The LMC Microlensing Events: Evidence for a Warped and Flaring Milky Way Disk?The Astrophysical Journal, 1998
- The MACHO Project Large Magellanic Cloud Microlensing Results from the First Two Years and the Nature of the Galactic Dark HaloThe Astrophysical Journal, 1997
- The Pop. II Lower Main Sequence: Some Properties and a Luminosity Function DeterminationPublished by Springer Nature ,1995
- Low-temperature Rosseland opacitiesThe Astrophysical Journal, 1994
- On the determination of the cosmic infrared background radiation from the high-energy spectrum of extragalactic gamma-ray sourcesThe Astrophysical Journal, 1994
- M dwarfs, microlensing, and the mass budget of the GalaxyThe Astrophysical Journal, 1994
- Observational limits on Omega in stars, brown dwarfs, and stellar remnants from gravitational microlensingThe Astrophysical Journal, 1994