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68 papers · 1 filter
Constraints on ultracompact minihalos from extragalactic γ-ray background
Yupeng Yang, Lei Feng, Xiaoyuan Huang +3
It has been proposed that ultracompact minihalos (UCMHs) might be formed in earlier epoch. If dark matter consists of Weakly Interacting Massive Particles (WIMPs), UCMHs can be tre…
The Abundance of New Kind of Dark Matter Structures
Yupeng Yang, Xuelei Chen, Tan Lu +1
A new kind of dark matter structures, ultracompact minihalos (UCMHs) was proposed recently. They would be formed during the radiation dominated epoch if the large density perturbat…
Dark Matter Mini-halo around the Compact Objects: the Formation, Evolution and Possible Contribution to the Cosmic Ray Electrons/Positrons
Rui-Zhi Yang, Yi-Zhong Fan, Roni Waldman +1
Dark matter particles may be captured by a star and then thermalized in the star's core. At the end of its life a massive star collapses suddenly and a compact object is formed. Th…
Particle kinetic analysis of a polar jet from SECCHI COR data
L. Feng, B. Inhester, J. de Patoul +2
Aims. We analyze coronagraph observations of a polar jet observed by the Sun Earth Connection Coronal and Heliospheric Investigation (SECCHI) instrument suite onboard the Solar TEr…
Stochastic Electron Acceleration in SNR RX J1713.7-3946
Zhonghui Fan, Siming Liu
Stochastic acceleration of charged particles due to their interactions with plasma waves may be responsible for producing superthermal particles in a variety of astrophysical syste…
On dark energy models of single scalar field
Mingzhe Li, Taotao Qiu, Yifu Cai +1
In this paper we revisit the dynamical dark energy model building based on single scalar field involving higher derivative terms. By imposing a degenerate condition on the higher d…