Abstract TianQin is a proposed space-based gravitational-wave detector mission to be deployed and operated in high Earth orbits. As a sequel to Zhang et al (2021 Phys. Rev. D 103 062001), we investigate a type of ‘orbital noise’ in TianQin’s range acceleration that is caused by gravitational perturbation associated with solar free oscillations. Frequencies of such oscillations are typically within TianQin’s measurement band of 0.1 mHz–1 Hz, and the disturbance level needs careful assessment. By using high-precision orbit propagation and adding the Sun’s time-variable oblateness J 2 to detailed gravity-field models, we examine the effect in the frequency domain and show that the solar free oscillation noise is expected to be two orders of magnitude lower than the noise requirement on single links and hence has little impact on the mission.

Kun Liu

Chengjian Luo

Xuefeng Zhang

Classical and Quantum Gravity

CLASSICAL AND QUANTUM GRAVITY 是引力和时空理论领域的物理学家、数学家和宇宙学家的知名期刊。该杂志现在是公认的经典相对论和量子引力所有领域的世界领导者。

Classical and Quantum Gravity is a renowned journal in the field of gravity and spacetime theory, widely recognized by physicists, mathematicians, and cosmologists. The journal is acknowledged as a world leader in all areas of classical relativity and quantum gravity.

《Classical and Quantum Gravity》是引力和时空理论领域的知名期刊，受到物理学家、数学家和宇宙学家的广泛认可。该杂志被公认为经典相对论和量子引力各个领域的全球领导者。

Category	Quartile
物理与天体物理	3
物理与天体物理, 天文与天体物理	3
物理与天体物理, 物理综合	3
物理与天体物理, 物理粒子与场物理	4
物理与天体物理, 量子科技	4

Effect of solar free oscillations on TianQin’s range acceleration noise

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