In this study,we investigate the detectability of the secondary spin in an extreme mass ratio inspiral(EMRI) system within a modified gravity model coupled with a scalar field.The central black hole,which reduces to a...In this study,we investigate the detectability of the secondary spin in an extreme mass ratio inspiral(EMRI) system within a modified gravity model coupled with a scalar field.The central black hole,which reduces to a Kerr one,is circularly spiralled by a scalar-charged spinning secondary body on the equatorial plane.The analysis reveals that the presence of the scalar field amplifies the secondary spin effect,allowing for a lower limit of the detectability and an improved resolution of the secondary spin when the scalar charge is sufficiently large.Our findings suggest that secondary spin detection is more feasible when the primary mass is not large,and TianQin is the optimal choice for detection.展开更多
基金Supported by the National Key Research and Development Program of China (2020YFC2201400)Yun-Gui Gong acknowledges the support by the National Key Research and Development Program of China (2020YFC2201504)+4 种基金Chao Zhang was supported by the China Postdoctoral Science Foundation (2023M742297)Brazilian agencies Funda??o de AmparoàPesquisa do Estado de S?o Paulo (FAPESP)Funda??o de AmparoàPesquisa do Estado do Rio de Janeiro (FAPERJ)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordena??o de Aperfei?oa-mento de Pessoal de Nível Superior (CAPES)。
文摘In this study,we investigate the detectability of the secondary spin in an extreme mass ratio inspiral(EMRI) system within a modified gravity model coupled with a scalar field.The central black hole,which reduces to a Kerr one,is circularly spiralled by a scalar-charged spinning secondary body on the equatorial plane.The analysis reveals that the presence of the scalar field amplifies the secondary spin effect,allowing for a lower limit of the detectability and an improved resolution of the secondary spin when the scalar charge is sufficiently large.Our findings suggest that secondary spin detection is more feasible when the primary mass is not large,and TianQin is the optimal choice for detection.
