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Temporal evolution of parent volatiles and dust in Comet 9P/Tempel 1 resulting from the Deep Impact experiment by Michael A. DiSanti; Geronimo L. Villanueva; Boncho P. Bonev; Karen Magee-Sauer; James E. Lyke; Michael J. Mumma is a Physics and Astronomy article available to read on EtoBox.

What is Temporal evolution of parent volatiles and dust in Comet 9P/Tempel 1 resulting from the Deep Impact experiment about?

The Deep Impact encounter with the Jupiter family Comet 9P/Tempel 1 on UT 2005 July 4 was observed at high spectral resolving power (λ/δλ ∼ 25,000) using the cross-dispersed near-infrared echelle spectrometer (NIRSPEC) at Keck-2. We report the temporal evolution of parent volatiles and dust (simultaneously measured) resulting from the event. Column abundances are presented for H 2 O and C 2 H 6 beginning 30 min prior to impact (T -30) and ending 50 min following impact (T + 50), and for H 2 O and HCN from T + 50 until T + 96, in time steps of approximately 6 min post-impact. The ejecta composition was revealed by an abrupt increase in H 2 O and C 2 H 6 near T + 25. This showed C 2 H 6 /H 2 O to be higher than its pre-impact value by a factor 2.4 ± 0.5, while HCN/H 2 O was unchanged within the uncertainty of the measurements. The mixing ratios for C 2 H 6 and HCN in the ejecta agree with those found in the majority of Oort cloud comets, perhaps indicating a common region of formation. The expanding dust plume was tracked by continuum measurements, both through the 3.5-μm spectral continuum and through 2-μm images acquired with the SCAM slit-viewing camera, and each showed a monotoni

Who reads Temporal evolution of parent volatiles and dust in Comet 9P/Tempel 1 resulting from the Deep Impact experiment?

Author

Michael A. DiSanti; Geronimo L. Villanueva; Boncho P. Bonev; Karen Magee-Sauer; James E. Lyke; Michael J. Mumma

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV; Oxford University Press (OUP) (ISSN 0019-1035)

Published

2007

Language

EN

Field

Physics and Astronomy (Physical Sciences)