Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-03T08:39:54.705Z Has data issue: false hasContentIssue false
  • English
  • Français

Cometary Origin of Carbon and Water on the Terrestrial Planets

Published online by Cambridge University Press:  07 August 2017

A. H. Delsemme
A. H. Delsemme*
Affiliation:
DEPARTMENT OF PHYSICS & ASTRONOMY THE UNIVERSITY OF TOLEDO TOLEDO, OH 43606, U.S.A.

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The origin of carbon and water on the terrestrial planets is not trivial, because their presence seems to be excluded by the high temperatures requested by the accretion disk models (Morfill 1988) as well as by Lewis' (1973) adiabat that can explain the different densities of the planets. These high temperatures imply that all dust was outgassed and dehydrated and most carbon stored in CO, that is in the gas phase, before the separation of dust from gas, that occurred by dust sedimentation to the mid-plane of the accretion disk. Thermochemical equilibrium was easily reached, since chemical kinetics (Lewis & Prinn 1980) had time constants shorter than the time needed to agglomerate the first planetesimals (Weidenschilling 1988).

Type
Solar System
Information
Symposium - International Astronomical Union , Volume 150: Astrochemistry of Cosmic Phenomena , 1992 , pp. 421 - 422
Copyright
Copyright © Kluwer 1992 

References

REFERENCES

Anders, E. 1986. p. 31–39 in Comets Nucleus Sample Return, ESA SP 249.Google Scholar
Anders, E. and Grevesse, N. 1989 Geochim. Cosmochim. Acta, 53, 197–214.CrossRefGoogle Scholar
Cameron, A.G.W. 1985, p. 1073–1099 in Protostars and Planets II, Black, and Matthews, (eds). Univ. of Arizona Press, Tucson.Google Scholar
Chyba, C. F. 1987, Nature 330, 632–635.Google Scholar
Delsemme, A. H. 1981, p. 141–159 in Comets and the Origins of Life, Ponnamperuma, (ed.), Reidel Publ., Dordrecht.Google Scholar
Delsemme, A. H. 1984, Origins of Life 14, 51–60. Delsemme, A.H. 1990a, in Comets in the Post-Halley Era, Newbum, et al. (eds.) Kluwer Acad. Press, Dordrecht (in press).Google Scholar
Delsemme, A. H. 1990b, in Proc. COSPAR XXVIII Plenary Meeting, The Hague (in press).Google Scholar
Hayashi, C., Nakazawa, K., and Nakagawa, Y. 1985. p. 1100–1153 in Protostars and Planets II. Black, and Matthews, (eds.). Univ. of Arizona Press, Tucson.Google Scholar
Ip, W. H., and Fernandez, J. A. 1988, Icarus 74, 47–62.Google Scholar
Lewis, J. S. 1974, Science 186, 440–443.Google Scholar
Lewis, J. S., Barshay, S. S., Noyes, B. 1979, Icarus 37, 190–206.Google Scholar
Lewis, J. S. and Prinn, R. B. 1980, Astrophys. J. 238, 357–364.Google Scholar
Lin, D.N.C., Papaloisou, J. 1985, p. 981–1072 in Protostars and Planets II, Black, and Matthews, (eds.). Univ. of Arizona Press, Tucson.Google Scholar
Lynden-Bell, D., and Pringle, J. E. 1974, M.N. Roy. Astron. Soc. London 168, 603–637.CrossRefGoogle Scholar
Matsui, T., and Abe, Y. 1986, Nature 322, 526–528.Google Scholar
Morfill, G. E. 1988, Icarus 75, 371–379 Google Scholar
Morfill, G. E., Tschamuter, W., Völk, H. J. 1985. p. 493–533 in Protostars and Planets II, Black, and Matthews, (eds.), Univ. of Arizona Press, Tucson.Google Scholar
Morfill, G. E., and Wood, J. A. 1989, Icarus 82, 225–243.Google Scholar
Smith, B. A. and Terrile, R. J. 1984, Science 226, 1421–1424.Google Scholar
Weidenschilling, S. J. 1988, p. 348–371 in “Meteorites and the Early Solar System”, Kerridge, J. F. and Matthews, M. S., eds., Univ. of Arizona Press, Tucson.Google Scholar
Wood, J. A., and Morfill, G. E. 1988, p. 329–347 in “Meteorites and the Early Solar System”, Kerridge, J. F. and Matthews, M. S., eds., Univ. of Arizona Press, Tucson.Google Scholar