标题： 天体物理学中玻色子星的特征：准正则模和旋进共振 显示英文标题

标题： Astrophysical signatures of boson stars: quasinormal modes and inspiral resonances

摘要： 紧致的玻色场结构，或玻色星，是有希望的暗物质候选者，已被提出作为活动星系核中超大质量致密天体的替代描述。 玻色星在大小和质量上可以与超大质量黑洞相媲美，它们通过电磁观测很难被区分。 然而，玻色星没有事件视界，其全局时空结构与黑洞不同。 这会在引力波辐射中留下特征性印记，可用于区分黑洞和其他无视界的致密天体。 在这里，我们在完全相对论的框架下对玻色星及其引力波特征进行了详细研究，这一研究在现有文献中存在许多不足之处。 我们构建了几种完全相对论的玻色星结构，并分析了它们的测地线结构和自由振荡频谱，即准正则模。 我们研究了玻色星时空对一个逐渐靠近的恒星级物体的引力和标量响应，并将其与对应的黑洞进行比较。 我们发现，紧致玻色星的一个普遍特征是，由在稳定准圆测地线上运动的小致密物体激发共振模式。 显示英文摘要

摘要： Compact bosonic field configurations, or boson stars, are promising dark matter candidates which have been invoked as an alternative description for the supermassive compact objects in active galactic nuclei. Boson stars can be comparable in size and mass to supermassive black holes and they are hard to distinguish by electromagnetic observations. However, boson stars do not possess an event horizon and their global spacetime structure is different from that of a black hole. This leaves a characteristic imprint in the gravitational-wave emission, which can be used as a discriminant between black holes and other horizonless compact objects. Here we perform a detailed study of boson stars and their gravitational-wave signatures in a fully relativistic setting, a study which was lacking in the existing literature in many respects. We construct several fully relativistic boson star configurations, and we analyze their geodesic structure and free oscillation spectra, or quasinormal modes. We explore the gravitational and scalar response of boson star spacetimes to an inspiralling stellar-mass object and compare it to its black hole counterpart. We find that a generic signature of compact boson stars is the resonant-mode excitation by a small compact object on stable quasi-circular geodesic motion.