Constraints on axino warm dark matter from X-ray observation at the Chandra telescope and SPI

Dey, Paramita ; Mukhopadhyaya, Biswarup ; Roy, Sourov ; Vempati, Sudhir K. (2012) Constraints on axino warm dark matter from X-ray observation at the Chandra telescope and SPI Journal of Cosmology and Astroparticle Physics, 2012 (05). 042-042. ISSN 1475-7516

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Official URL: http://iopscience.iop.org/article/10.1088/1475-751...

Related URL: http://dx.doi.org/10.1088/1475-7516/2012/05/042

Abstract

A sufficiently long lived warm dark matter could be a source of X-rays observed by satellite based X-ray telescopes. We consider axinos and gravitinos with masses between 1 keV and 100 keV in supersymmetric models with small R-parity violation. We show that axino dark matter receives significant constraints from X-ray observations of Chandra and SPI, especially for the lower end of the allowed range of the axino decay constant fa, while the gravitino dark matter remains unconstrained.

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