CaltechAUTHORS
  A Caltech Library Service

The Volatile Composition of the Split Ecliptic comet 73P/Schwassmann-Wachmann 3: A Comparison of Fragments C and B

Villanueva, Geronimo L. and Bonev, Boncho P. and Mumma, Michael J. and Magee-Sauer, Karen and DiSanti, Michael A. and Salyk, C. and Blake, Geoffrey A. (2006) The Volatile Composition of the Split Ecliptic comet 73P/Schwassmann-Wachmann 3: A Comparison of Fragments C and B. Astrophysical Journal Letters, 650 (1). L87-L90. ISSN 2041-8205. https://resolver.caltech.edu/CaltechAUTHORS:20110728-093115090

[img]
Preview
PDF - Published Version
See Usage Policy.

248Kb

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20110728-093115090

Abstract

The composition of fragments C and B of the Jupiter-family comet 73P/Schwassmann-Wachmann 3 (SW3) was investigated in early April of 2006 at IR wavelengths using high-dispersion echelle spectroscopy. Both fragments were depleted in ethane, and C was depleted in most forms of volatile carbon. In particular, fragment C shows a severe depletion of CH_(3)OH but a "normal" abundance of HCN (which has a similar volatility). Thermal processing is a possible explanation, but since fragment B is perhaps sublimating fresher material because of the frequent outbursts and fragmentation, the observed depletions might have cosmogonic implications. The chemistry of the volatile ices in SW3, like in the Oort Cloud comet C/1999 S4 (LINEAR), may be associated with sublimation of icy mantles from precometary grains followed by subsequent gas-phase chemistry and recondensation.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1086/508806DOIArticle
http://iopscience.iop.org/1538-4357/650/1/L87PublisherArticle
ORCID:
AuthorORCID
Salyk, C.0000-0003-3682-6632
Blake, Geoffrey A.0000-0003-0787-1610
Additional Information:© 2006 American Astronomical Society. Received 2006 June 20; accepted 2006 September 1; published 2006 September 26. G. L. V. acknowledges support under the NPP Resident Research Associateship Program managed by ORAU. This work was supported by the NASA Planetary Astronomy Program (RTOP 344-32-98 to M. A. D. and RTOP 344-32-07 to M. J. M.) and the NASA Astrobiology Program (RTOP 344-53-51 to M. J. M.). K. M.-S. acknowledges support from the National Science Foundation RUI Program (0407052). G. A. B. acknowledges support from the NASA Origins of Solar Systems program. We thank James Lyke and the staff of Keck Observatory for general support. The data presented herein were obtained at the W. M. Keck Observatory operated as a scientific partnership among Caltech, UCLA, and NASA. This Observatory was made possible by the generous financial support of the W. M. Keck Foundation.
Funders:
Funding AgencyGrant Number
NPP Resident Research Associateship Program managed by ORAUUNSPECIFIED
NASARTOP 344-32-98
NASARTOP 344-32-07
NASARTOP 344-53-51
NSFAST-0407052
Subject Keywords:comets: individual (73P/SW3); Kuiper Belt; solar system: formation
Issue or Number:1
Record Number:CaltechAUTHORS:20110728-093115090
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20110728-093115090
Official Citation:The Volatile Composition of the Split Ecliptic comet 73P/Schwassmann-Wachmann 3: A Comparison of Fragments C and B Geronimo L. Villanueva et al 2006 ApJ 650 L87
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:24577
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:28 Jul 2011 20:06
Last Modified:09 Dec 2019 22:03

Repository Staff Only: item control page