Rotation of Comet 103P/Hartley 2 from Spectroscopy at 1 mm

Details Rotation of Comet 103P/Hartley 2 from Spectroscopy at 1 mm Rotation of Comet 103P/Hartley 2 from Spectroscopy at 1 mm

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1713d&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1713

Physics

Scientific paper

In late 2010 the Jupiter-family comet 103P/Hartley 2 was intensively observed by the EPOXI spacecraft and from many Earth-based observatories. We joined this effort and monitored emission lines of HCN using several ground-based mm/submm telescopes. The spectral time series shows strong line variability caused by the rotation of cometary jets, and provides evidence for excitation and rapid deceleration of the nucleus rotation state. Based on these measurements we derive immediate consequences for the rotational stability of comet 103P/Hartley 2 and also broad implications for the population of comets.

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