Testing Gravity in the Outer Solar System: Results from Trans-Neptunian Objects

Abstract

The inverse square law of gravity is poorly probed by experimental tests at distances of ~ 10 AUs. Recent analysis of the trajectory of the Pioneer 10 and 11 spacecraft have shown an unmodeled acceleration directed toward the Sun which was not explained by any obvious spacecraft systematics, and occurred when at distances greater than 20 AUs from the Sun. If this acceleration represents a departure from Newtonian gravity or is indicative of an additional mass distribution in the outer solar system, it should be detectable in the orbits of Trans-Neptunian Objects (TNOs). To place limits on deviations from Newtonian gravity, we have selected a well observed sample of TNOs found orbiting between 20 and 100 AU from the Sun. By examining their orbits with modified orbital fitting software, we place tight limits on the perturbations of gravity that could exist in this region of the solar system.

20 pages, 4 figures, 2 tables, uses AASTex v5.x macros

References in corpus (11)

• The Confrontation between General Relativity and Experiment
• Study of the anomalous acceleration of Pioneer 10 and 11
• Indication, from Pioneer 10/11, Galileo, and Ulysses Data, of an Apparent Anomalous, Weak, Long-Range Acceleration
• Dark matter vs. modifications of the gravitational inverse-square law. Results from planetary motion in the solar system
• The Study of the Pioneer Anomaly: New Data and Objectives for New Investigation
• What do the orbital motions of the outer planets of the Solar System tell us about the Pioneer anomaly?
• Are there hyperentropic objects ?
• Can Minor Planets be Used to Assess Gravity in the Outer Solar System?
• The Pioneer Anomaly and Its Implications
• A Route to Understanding of the Pioneer Anomaly
• A Mission to Explore the Pioneer Anomaly

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