Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
, 108 (24), 241101

Support for the Thermal Origin of the Pioneer Anomaly


Support for the Thermal Origin of the Pioneer Anomaly

Slava G Turyshev et al. Phys Rev Lett.


We investigate the possibility that the anomalous acceleration of the Pioneer 10 and 11 spacecraft is due to the recoil force associated with an anisotropic emission of thermal radiation off the vehicles. To this end, relying on the project and spacecraft design documentation, we constructed a comprehensive finite-element thermal model of the two spacecraft. Then, we numerically solve thermal conduction and radiation equations using the actual flight telemetry as boundary conditions. We use the results of this model to evaluate the effect of the thermal recoil force on the Pioneer 10 spacecraft at various heliocentric distances. We found that the magnitude, temporal behavior, and direction of the resulting thermal acceleration are all similar to the properties of the observed anomaly. As a novel element of our investigation, we develop a parametrized model for the thermal recoil force and estimate the coefficients of this model independently from navigational Doppler data. We find no statistically significant difference between the two estimates and conclude that, once the thermal recoil force is properly accounted for, no anomalous acceleration remains.

Similar articles

See all similar articles

Cited by 2 PubMed Central articles

  • The Confrontation Between General Relativity and Experiment
    CM Will. Living Rev Relativ 17 (1), 4. PMID 28179848. - Review
    The status of experimental tests of general relativity and of theoretical frameworks for analyzing them is reviewed and updated. Einstein's equivalence principle (EEP) is …
  • Re-examination of Globally Flat Space-Time
    MR Feldman. PLoS One 8 (11), e78114. PMID 24250790.
    In the following, we offer a novel approach to modeling the observed effects currently attributed to the theoretical concepts of "dark energy," "dark matter," and "dark f …

LinkOut - more resources