Kaon condensation during the thermal evolution of protoneutron stars and the possibility of low-mass block hola

L)原中子星由于介子凝聚而延迟崩塌的可能性我们提出了一个在中微子和温度存在的情况下介子凝聚的新公式，并根据手征对称性导出了状态方程。利用这个状态方程，我们系统地研究了质子中子星的平衡结构，并详细讨论了它作为熵和轻子数的函数的性质。然后，我们讨论了质子中子星在热演化过程中由于K介子凝聚的发生和状态方程的大幅软化而延迟崩塌的可能性。因此，我们展示了中微子俘获效应的重要性，而本还没有强调这一点。我们还通过与其他文献的结果比较，阐明了手征模型的具体特征。我们的研究成果已发表在期刊上，也发表在国际会议上。2)超子物质和超子超流…此外，我们还利用超核研究中得到的现实超子-超子和核子相互作用，研究了高密度核物质中的超子混合问题和超子超流的可能性。因此，考虑到状态方程的急剧软化和中子星的观测质量，我们提出了在超音速物质中应该存在额外的排斥效应。对于超子超流，我们的结论是，像Λ，Σ^-，Ξ^-这样的超子应该表现为超流。3)夸克物质的铁磁性我们研究了核物质和夸克物质的铁磁性作为致密恒星磁场起源的可能性，这是由磁星这一具有超强磁场的新型中子星引发的。我们证明了在低密度的夸克物质中应该存在自发磁化，并指出如果我们可以把磁星看作夸克星，我们就可以解释超强磁场。我们还通过考虑非微扰效应，强调了夸克铁磁性的相对论性质。较少

l) Possibility of the delayed collapse of protoneutron stars due to Kaon condensationWe have presented a new formulation of kaon condensation in the presence of neutrinos and temperature and derived the equation of state (EOS), based on chiral symmetry. Using this EOS, we have systematically examined the equilibrium structure of protoneutron stars and discussed its properties in detail as functions of entropy and lepton number. Then we have discussed the possibility of the delayed collapse of protoneutron stars due to the occurrennce of kaon condensation and the large softening of EOS during their thermal evolution. As a result we have shown the importance of the neutrino trapping effect, which has not benn emphasized yet. We have also clarified the specific features of the chiral model by comparing our results with those given in other papers. Our results have been published in the journals and also reported in the international conferences.2) Hyperonic matter and hyperon superfluidit … More yUsing the realistic hyperon-hyperon and -nucleon interactions obtained from the studies for hypernuclei, we have studied the problem of hyperon mixing in high density nuclear matter and the possibility of hyperon superfluidity. As a result we have suggested that there should be additional repulsive effects in hyperonic matter by considering the drastic softening of EOS and the observational mass of neutron stars. As for the hyperon superfluidity, we have concluded that hyperons such as Λ, Σ^-, Ξ^- should show superfluidity.3) Ferromagnetism of quark matterWe have studied the possibility of ferromagnetism of nuclear matter and quark matter as an origin of magnetic field in compact stars, triggered by the observation of magnetars, a new type of "neutron stars" with the superstrong magnetic field. We have shown that there should be a spontaneous magnetization at low densities in quark matter, and indicated that we can explain the superstrong magnetic field if we can regard magnetars as quark stars. We have also emphasized the relativistic aspects of quark ferromagnetism by considering the non-perturbative effects. Less