Monitoring Active Centaurs by Pan-STARRS 1

Details Monitoring Active Centaurs by Pan-STARRS 1 Monitoring Active Centaurs by Pan-STARRS 1

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21822415l&link_type=abstract

American Astronomical Society, AAS Meeting #218, #224.15; Bulletin of the American Astronomical Society, Vol. 43, 2011

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Scientific paper

Centaurs are Solar system small bodies orbiting around the sun between the orbit of Jupiter and Neptune. They are believed to be resupplying the current population of short period comets. About 13% Centaurs show cometary-like activities. However, those active Centaurs never cross the ice-line of solar system; the volatility of water ice hence should not be the triggering source of cometary activity. CO ice is an alternative and has been reported in two Centaurs, but it is too volatile to explain the distribution of measured perihelion. Some other materials had been suggested to be the triggering source of active Centaurs, for example, amorphous ice.
To the further investigate of Centaurs activities, a long-term monitoring of large number of Centaurs is initiated with Pan-STARRS 1 data. In this poster we present our method to identify Centaur activity and show early results of 40 known Centaurs from PS1 observations.

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