The influence of medium effects on the gross structure of hybrid stars |
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| Institution: | 1. College of Bioresource Sciences, Nihon University, Fujisawa 252-0880, Japan;2. National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan;3. Department of Physics, University of Wisconsin, Madison, WI 53706, USA;4. Graduate School of Science, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan;5. Beihang University, School of Physics, International Research Center for Big-Bang Cosmology and Element Genesis, Beijing 100083, China;6. Department of Physics, Soongsil University, Seoul, 156-743, Republic of Korea;7. Center of Astrophysics, Department of Physics, University of Notre Dame, Notre Dame, IN 46556, USA;1. Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan;2. KEK Theory Center, Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization, 1-1, Oho, Ibaraki, 305-0801, Japan;3. Graduate University for Advanced Studies (SOKENDAI), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan;1. Institute of Technical Sciences of the Serbian Academy of Sciences and Arts, Knez Mihailova 35/IV, 11000 Belgrade, Serbia;2. Faculty of Mechanical Engineering, University of Belgrade, Belgrade, Serbia;3. Joint Laboratory for Advanced Materials of SASA, Section for Amorphous Systems, Faculty of Technical Sciences ?a?ak, University of Kragujevac, 32 000 ?a?ak, Serbia;4. North Carolina Central University, Durham, NC, USA;5. NASA University Research Center for Aerospace Device Research and Education and NSF Center of Research Excellence in Science and Technology Computational Center for Fundamental and Applied Science and Education, NC, USA;6. Serbian Academy of Sciences and Arts, Knez Mihailova 35, 11000 Belgrade, Serbia |
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| Abstract: | We investigate the influence of medium effects on the structure of hybrid stars, i.e. neutron stars possessing a quark matter core. We found that medium effects in quark matter reduce the extent of a pure quark matter phase in the interior of a hybrid star significantly in favor of a mixed phase of quark and hadronic matter. Over a wide range of the strong coupling constant — which parameterizes the influence of medium effects — quark matter is able to exist at least in a mixed phase in the interior of neutron stars. |
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