Cometary activity in 2060 Chiron at minimum brightness

Possible ring material around centaur (2060) Chiron

We propose that several short-duration events observed in past stellar occultations by Chiron were produced by ring material. Some similarities between these events and the characteristics of Chariklo’s rings could indicate common mechanisms around centaurs. From a reanalysis of the stellar occultation data in the literature, we determined two possible orientations of the pole of Chiron’s rings...

Water Ice in 2060 Chiron and Its Implications for Centaurs and Kuiper Belt Objects.

We report the detection of water ice in the Centaur 2060 Chiron, based on near-infrared spectra (1.0-2.5 µm) taken with the 3.8 m United Kingdom Infrared Telescope and the 10 m Keck Telescope. The appearance of this ice is correlated with the recent decline in Chiron's cometary activity: the decrease in the coma cross section allows previously hidden solid-state surface features to be seen. We ...

CHIRON efficiency

Biform Theories in Chiron

An axiomatic theory represents mathematical knowledge declaratively as a set of axioms. An algorithmic theory represents mathematical knowledge procedurally as a set of algorithms. A biform theory is simultaneously an axiomatic theory and an algorithmic theory. It represents mathematical knowledge both declaratively and procedurally. Since the algorithms of algorithmic theories manipulate the s...

CHIRON: a package for ChPT numerical results at two loops†

This document describes the package CHIRON which includes two libraries, chiron itself and jbnumlib. chiron is a set of routines useful for two-loop numerical results in Chiral Perturbation Theory (ChPT). It includes programs for the needed oneand two-loop integrals as well as routines to deal with the ChPT parameters. The present version includes everything needed for the masses, decay constan...