Organics Captured from Comet 81P/Wild 2 by the Stardust Spacecraft

Organics found in comet 81P/Wild 2 samples show a heterogeneous and unequilibrated distribution in abundance and composition. Some organics are similar, but not identical, to those in interplanetary dust particles and carbonaceous meteorites. A class of aromatic-poor organic material is also present. The organics are rich in oxygen and nitrogen compared with meteoritic organics. Aromatic compounds are present, but the samples tend to be relatively poorer in aromatics than are meteorites and interplanetary dust particles. The presence of deuterium and nitrogen-15 excesses suggest that some organics have an interstellar/protostellar heritage. Although the variable extent of modification of these materials by impact capture is not yet fully constrained, a diverse suite of organic compounds is present and identifiable within the returned samples.

Andrew Steele | Ian A. Franchi | Luigi Colangeli | Michael E. Zolensky | Chris Jacobsen | Richard N. Zare | John P. Bradley | Donald E. Brownlee | Gianluca Ferrini | Scott A. Sandford | Tolek Tyliszczak | Holger Fleckenstein | Maria E. Palumbo | Andrew J. Westphal | Alessandra Rotundi | Giuseppe A. Baratta | Thomas Stephan | Christopher J. Snead | Mark J. Burchell | A. L. David Kilcoyne | Sue Wirick | Simon J. Clemett | Marc Fries | George J. Flynn | Lindsay P. Keller | Peter Tsou | Daniel P. Glavin | Hikaru Yabuta | Vito Mennella | Matthieu Gounelle | Jason P. Dworkin | George Cody | Janet Borg | Larry R. Nittler | Zahia Djouadi | S. Bajt | T. Tyliszczak | A. Westphal | J. Borg | D. Brownlee | M. Burchell | A. Butterworth | G. Cody | G. Flynn | L. Nittler | S. Sandford | F. Stadermann | T. Stephan | P. Tsou | M. Zolensky | H. Fleckenstein | C. Jacobsen | R. Zare | L. d'Hendecourt | A. Steele | S. Clemett | C. Snead | J. Brucato | L. Colangeli | F. Robert | I. Franchi | H. Yabuta | J. Dworkin | D. Glavin | J. Bradley | H. Busemann | L. Keller | A. Rotundi | V. Mennella | T. Araki | M. Fries | B. Wopenka | A. Meibom | M. Gilles | G. Baratta | M. Palumbo | S. Wirick | D. Papanastassiou | Mary K. Gilles | Dimitri A. Papanastassiou | Brigitte Wopenka | Conel M. O'D. Alexander | S. Mostefaoui | Henner Busemann | Anders Meibom | Tohru Araki | Louis D'Hendecourt | Jan Leitner | Frank J. Stadermann | M. Gounelle | G. Cooper | Maegan K. Spencer | G. Matrajt | Jérôme Aléon | John R. Brucato | Anna Butterworth | George Cooper | Faustine Grossemy | Graciela Matrajt | Smail Mostefaoui | François Robert | C. Alexander | A. Kilcoyne | Sas̆a Bajt | Z. Djouadi | J. Aléon | J. Leitner | G. Ferrini | F. Grossemy

[1]  G. Strazzulla,et al.  Vibrational spectroscopy of ion-irradiated ices. , 2001, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.

[2]  F. R. Krueger,et al.  The organic component in dust from comet Halley as measured by the PUMA mass spectrometer on board Vega 1 , 1987, Nature.

[3]  R N Zare,et al.  Identification of Complex Aromatic Molecules in Individual Interplanetary Dust Particles , 1993, Science.

[4]  Ray H. Baughman,et al.  Supporting Online Material , 2003 .

[5]  James H. Doty,et al.  Amino acid analyses of Antarctic CM2 meteorites using liquid chromatography‐time of flight‐mass spectrometry , 2006 .

[6]  Andrew Steele,et al.  Comet 81P/Wild 2 Under a Microscope , 2006, Science.

[7]  Carl Sagan,et al.  Endogenous production, exogenous delivery and impact-shock synthesis of organic molecules: an inventory for the origins of life , 1992, Nature.

[8]  青木 貞雄.  Proceedings of the 8 th International Conference on X-Ray Microscopy , 2006 .

[9]  Scott A. Sandford,et al.  Organic Compounds Produced by Photolysis of Realistic Interstellar and Cometary Ice Analogs Containing Methanol , 1995 .

[10]  Hans-Peter Schertl,et al.  Geochim. cosmochim. acta , 1989 .

[11]  J. Pasteris,et al.  Structural characterization of kerogens to granulite-facies graphite; applicability of Raman microprobe spectroscopy , 1993 .

[12]  F. Robert,et al.  Interstellar chemistry recorded by nitrogen isotopes in Solar System organic matter , 2004 .

[13]  J. Borg,et al.  FTIR analysis of the organics in IDPs: Comparison with the IR spectra of the diffuse interstellar medium , 2005 .

[14]  A. Delsemme.  Cometary origin of carbon and water on the terrestrial planets. , 1992, Advances in space research : the official journal of the Committee on Space Research.

[15]  Ian D. Hutcheon,et al.  Isotopic Compositions of Cometary Matter Returned by Stardust , 2006, Science.

[16]  P. Hoppe,et al.  Interstellar Chemistry Recorded in Organic Matter from Primitive Meteorites , 2006, Science.

[17]  B. Wopenka.  Raman observations on individual interplanetary dust particles , 1988 .

[18]  M. Hogerheijde,et al.  Molecules in astrophysics. Probes and processes , 1996 .

[19]  K. Sellgren,et al.  The interstellar C-H stretching band near 3.4 microns: constraints on the composition of organic material in the diffuse interstellar medium. , 1991, The Astrophysical journal.

[20]  Andrew Steele,et al.  Infrared Spectroscopy of Comet 81P/Wild 2 Samples Returned by Stardust , 2006, Science.

[21]  D. Schneider.  To whom correspondence should be addressed , 2008 .

[22]  F. R. Krueger,et al.  The Cometary and Interstellar Dust Analyzer at Comet 81P/Wild 2 , 2004, Science.

[23]  S. Sandford,et al.  An experimental study of the organic molecules produced in cometary and interstellar ice analogs by thermal formaldehyde reactions. , 1993, Icarus.

[24]  L. Bonal,et al.  Determination of the petrologic type of CV3 chondrites by Raman spectroscopy of included organic matter , 2006 .

[25]  J. Lunine,et al.  Protostars and planets III , 1993 .

[26]  Bruce E. Taylor.  New frontiers in stable isotopic research: Laser probes, ion probes, and small-sample analysis , 1990 .

[27]  J. Ashby.  References and Notes , 1999 .

[28]  Y. Pendleton,et al.  The Organic Refractory Material in the Diffuse Interstellar Medium: Mid-Infrared Spectroscopic Constraints , 2002 .

[29]  S. Messenger.  Identification of molecular-cloud material in interplanetary dust particles , 2000, Nature.