The nature of pulsars is still unknown because of the non-perturbative effects of the fundamental strong interaction,so various models of pulsar inner structures are suggested,either for conventional neutron stars or ...The nature of pulsars is still unknown because of the non-perturbative effects of the fundamental strong interaction,so various models of pulsar inner structures are suggested,either for conventional neutron stars or quark stars.Additionally,a quark-cluster matter state is conjectured for cold matter at supranuclear density,and as a result pulsars can be quark-cluster stars.Besides understanding the different manifestations,the most important issue is to find an effective way to observationally differentiate these models.X-ray polarimetry plays an important role here.The thermal x-ray polarization of quark/quark-cluster stars is focused on,and while the thermal x-ray linear polarization percentage is typically higher than~10%in normal neutron star models,the percentage of quark/quark-cluster stars is almost zero.This could then be an effective method to identify quark/quark-cluster stars by soft x-ray polarimetry.We are therefore expecting to detect thermal x-ray polarization in the coming decades.展开更多
It is conjectured that coherent re-emission of cyclotron resonance absorption could result in pulsar giant pulses.This conjecture seems reasonable as it can naturally explain the distribution of pulsars with giant pul...It is conjectured that coherent re-emission of cyclotron resonance absorption could result in pulsar giant pulses.This conjecture seems reasonable as it can naturally explain the distribution of pulsars with giant pulses on the P-P diagram.展开更多
基金the National Basic Research Program of China under Grant Nos 2012CB821800 and 2009CB824800the National Natural Science Foundation of China under Grant Nos 11225314,10935001 and 10973002.
文摘The nature of pulsars is still unknown because of the non-perturbative effects of the fundamental strong interaction,so various models of pulsar inner structures are suggested,either for conventional neutron stars or quark stars.Additionally,a quark-cluster matter state is conjectured for cold matter at supranuclear density,and as a result pulsars can be quark-cluster stars.Besides understanding the different manifestations,the most important issue is to find an effective way to observationally differentiate these models.X-ray polarimetry plays an important role here.The thermal x-ray polarization of quark/quark-cluster stars is focused on,and while the thermal x-ray linear polarization percentage is typically higher than~10%in normal neutron star models,the percentage of quark/quark-cluster stars is almost zero.This could then be an effective method to identify quark/quark-cluster stars by soft x-ray polarimetry.We are therefore expecting to detect thermal x-ray polarization in the coming decades.
基金supported by the National Key R&D Program of China(Grant No.2018YFA0404703)the National Natural Science Foundation of China(Grant Nos.11673002,12003047 and U1531243)the Open Project Program of the Key Laboratory of FAST,NAOC,Chinese Academy of Sciences。
文摘It is conjectured that coherent re-emission of cyclotron resonance absorption could result in pulsar giant pulses.This conjecture seems reasonable as it can naturally explain the distribution of pulsars with giant pulses on the P-P diagram.
