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Dark matter in the outer solar system.

T Owen1, D Cruikshank, C de Bergh

  • 1University of Hawaii Institute for Astronomy, Honolulu 96822, USA.

Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)
|January 1, 1995
PubMed
Summary
This summary is machine-generated.

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Scientists are studying dark materials on outer solar system bodies. Current spectral data lacks clear absorption features, hindering material identification, with the composition of 5145 Pholus remaining unknown.

Area of Science:

  • Planetary Science
  • Astronomy
  • Spectroscopy

Background:

  • Numerous small bodies in the outer solar system are covered by dark, unidentifiable material.
  • Previous attempts to characterize this material have been unsuccessful due to a lack of distinct spectral absorption features.

Purpose of the Study:

  • To investigate the composition of dark materials on outer solar system small bodies.
  • To identify the nature of unexplained spectral absorptions observed in these objects.

Main Methods:

  • Analysis of reflection spectra from outer solar system small bodies.
  • Review of observational data for spectral features, including a previously reported 2.2 micrometer absorption.
  • Examination of the spectrum of the red planetesimal 5145 Pholus.
Keywords:
NASA Discipline ExobiologyNon-NASA Center

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Main Results:

  • Absence of discrete absorption features in the reflection spectra of most studied objects.
  • A previously suggested 2.2 micrometer absorption feature has not been confirmed by new observations.
  • Three well-established absorptions exist in the spectrum of 5145 Pholus, but their origin is unknown.

Conclusions:

  • The composition of dark materials on outer solar system small bodies remains largely unidentified.
  • Further research is needed to understand the nature of spectral features, particularly those observed in 5145 Pholus.