Probing Dark Matter's Gravitational Effects Locally with TianQin

Abstract

In this study, we explore the potential of using TianQin missions to probe the local gravitational effects of dark matter. The TianQin project plans to launch satellites at both low and high orbits. High-precision orbit determination is expected to aid in detecting Earth's gravity or gravitational waves. By comparing the derived masses in low and high orbits, it is possible to constrain the amount of dark matter between the two spheres, hence placing a local constraint on dark matter's gravitational effect. Our results show the capability of TianQin in detecting the density of dark matter around Earth, with an ultimate sensitivity to a value of $10^{-8}\mathrm{kg}{\mathrm{m}}^{-3}$. This detection limit surpasses the estimated bounds for the solar system and the observation results for our Galaxy by approximately 7 and 14 orders of magnitude, respectively.

6 pages, 2 figures

References in corpus (10)

• The NANOGrav 15-year Data Set: Search for Signals from New Physics
• GipsyX/RTGx, A New Tool Set for Space Geodetic Operations and Research
• The TianQin project: current progress on science and technology
• Current status of direct dark matter detection experiments
• The First Round Result from the TianQin-1 Satellite
• The second data release from the European Pulsar Timing Array: VI. Challenging the ultralight dark matter paradigm
• Constraining ultralight vector dark matter with the Parkes Pulsar Timing Array second data release
• Detecting Ultralight Dark Matter Gravitationally with Laser Interferometers in Space
• New Constraints on Dark Matter and Cosmic Neutrino Profiles through Gravity
• Probing Stochastic Ultralight Dark Matter with Space-based Gravitational-Wave Interferometers