Gamma-Ray Astronomy and Baryonic Dark Matter
نویسندگان
چکیده
منابع مشابه
Gamma Ray Astronomy and Baryonic Dark Matter
Recently, Dixon et al. (1998) have re-analyzed the EGRET data, finding a statistically significant diffuse γ-ray emission from the galactic halo. We show that this emission can naturally be explained within a previously-proposed model for baryonic dark matter, in which γ-rays are produced through the interaction of high-energy cosmic-ray protons with cold H2 clouds clumped into dark clusters th...
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We expand on the recently reported detections of the gamma-ray resonant absorption along the line of sight toward gamma-ray bright quasars (QSOs), like 3C279. We propose to use this novel gamma-ray absorption method to study the Dark Matter distribution in the Milky Way, as well as in the Local Group. Properties of the absorber that was detected on the sight lines towards gamma-ray bright QSOs ...
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These lectures on non-baryonic dark matter matter are divided into two parts. In the first part, I discuss the need for non-baryonic dark matter in light of recent results in cosmology, and I present some of the most popular candidates for non-baryonic dark matter. These include neutrinos, axions, neutralinos, WIMPZILLAs, etc. In the second part, I overview several observational techniques that...
متن کاملBaryonic Dark Matter and the Diffuse γ-ray Background
We show that the baryonic gas content of the halo of our galaxy can be probed by performing a multipole expansion on the distribution of diffuse background gamma-ray emission. While the monopole moment (isotropic background) can be used to constrain the baryonic fraction of the halo gas, the quadrupole to monopole ratio is a sensitive probe of the distribution of gas in the halo, i.e. the degre...
متن کاملNon–baryonic Dark Matter Searches
The emphasise in this review about non–baryonic dark matter will be on experimental approaches to this fast evolving field of astroparticle physics, especially the direct detection method. The current status of experimental techniques will be reviewed and recent highlights as well as future plans will be introduced.
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1999
ISSN: 0004-637X
DOI: 10.1086/311816