Fermion-Fermion Stars |
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| Authors: | JIN KeJian ZHANG YuanZhong |
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| Institution: | 1. Department of Physics, Northern Jiaotong University, Beijing 100044, China;
2. Institute of Theoretical Physics, The Chinese Academy of Sciences, P.O. Box 2735, Beijing 100080, China;
3. The State Key Lab. of Scientific and Engineering Computing, The Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | The fermion-fermion stars, i.e., the dark matter self-gravitating systems made from two kinds of fermions with different masses, are considered. We review the stability of the systems, present a comparison between the maxima of gravitational redshift for fermion stars, compact stars, Bondi stars, bonson stars and fermion-fermion stars, and then investigate rotation curves of fermion-fermion stars (two-component concentric spheres) which might be polytropic dark matter halos of galaxies. Results show that the fermion-fermion stars would give rotation curves with flat part at large radii. This presents a striking contrast with the rotation curve of a single component fermion star which has no flat parts. |
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| Keywords: | dark matter fermion stars rotation curves |
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