Statistical analysis of asteroidal and cometary polarization phase curves

Antti Penttilä (1) , Kari Lumme (1) , Edith Hadamcik (2) , Anny Chantal Levasseur-Regourd (2)

1 Helsingin yliopisto = Helsingfors universitet = University of Helsinki
2 SA - Service d'aéronomie

We use an empirical polarization phase curve model at various wavelengths to predict some statistical properties of comets and asteroids. First, we show how our model with Bayesian MCMC numerical methods predicts polarization behaviour at larger phase angles when only the smaller angle data are used. Our empirical model incorporates both the phase and colour dependency on the same footing. Second, a comparison between the existing taxonomy of asteroids and the clustering of asteroid classes based on polarization suggests a new method for the classification. We also heavily concentrate on the derivations of quantitative errors in our analysis.

Domaines: Océan, Atmosphère

Antti Penttilä, Kari Lumme, Edith Hadamcik, Anny Chantal Levasseur-Regourd. Statistical analysis of asteroidal and cometary polarization phase curves. Astronomy and Astrophysics - A&A, 2005, 432, pp.1081-1090. ⟨10.1051/0004-6361:20042133⟩. ⟨hal-00078181⟩