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1 edition of Infrared observations of comets Halley and Wilson and properties of the grains found in the catalog.

Infrared observations of comets Halley and Wilson and properties of the grains

Infrared observations of comets Halley and Wilson and properties of the grains

summary of workshop sponsored by the National Aeronautics and Space Administration, Washington, D.C. and held at Cornell University, Ithaca, New York, August 10-12, 1987

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Published by National Aeronautics and Space Administration, Scientific and Technical Information Division, For sale by the National Technical Information Service in Washington, D.C, Springfield, VA .
Written in English

    Places:
  • Halley"s comet,
  • Wilson"s comet
    • Subjects:
    • Cosmochemistry -- Congresses.,
    • Cosmic dust -- Congresses.,
    • Interplanetary astronomy -- Congresses.,
    • Halley"s comet -- Congresses.,
    • Wilson"s comet -- Congresses.

    • Edition Notes

      Includes bibliographical references.

      StatementMartha S. Hanner, editor.
      GenreCongresses.
      SeriesNASA conference publication ;, 3004
      ContributionsHanner, M. S., United States. National Aeronautics and Space Administration.
      Classifications
      LC ClassificationsQB723.H2 I54 1988
      The Physical Object
      Paginationxv, 186 p. :
      Number of Pages186
      ID Numbers
      Open LibraryOL2150441M
      LC Control Number88603231

        M.S. Hanner (Ed.), NASA Conf. Pub. , Infrared Observations of Comets Halley and Wilson and Properties of the Grains (), pp. . Infrared Observations of Comets Halley and Wilson and Properties of the Grains © – By: Attention eBay Staff: The book or books on this media were copyrighted prior to January 1, and/or are Government publications which are free of copyright restrictions. This media resides within the Public Domain as defined by the United Seller Rating: % positive.

      Infrared Observations of Comets Halley and Wilson and Properties of the Grains © – By: NASA – pages: Meteorite Studies © – By: Oliver Farrington – 60 pages: This Wonderful Universe: a Little Book About Suns and World, Moons and Meteors. In: Infrared Observations of Comets Halley and Wilson and Properties of the Grains (Hanner, M.S., Ed.). Pasadena, CA: NASA, Jet Propulsion Laboratory, p. , (NASA-CP) (GWU ) Arrhenius*, G.; Arrhenius, S. Band structure of the solar system: An objective test of the grouping of planets and satellites.

        In this paper we present images of Comets 65P/Gunn and 46P/Wirtanen obtained by means of ISOCAM in the broadband filters at (LW7) and μm (LW3). The observations were performed on 23 March and on 9 November , respectively. The aim of this work is to analyze the coma and tail dust environment of the targets. FY88 Progress: A report was prepared from Aug. workshop on Infrared Observations of Comets Halley and Wilson and Properties of the Grains, (NASA SP, in press, M. Hanner, ed.). Comets Wilson, Klemola, Brooks 2, Borrelly, and Bradfield were observed at the IRTF in Sept. 87 and Feb. We detected 10 and 18 micron thermal emission for Wilson.


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Infrared observations of comets Halley and Wilson and properties of the grains Download PDF EPUB FB2

Infrared observations of comets Halley and Wilson and properties of the grains: summary of a workshop sponsored by the National Aeronautics and Space Ithaca, New York, AugustPaperback – Aug by M S Hanner Author: M S Hanner. Infrared observations of comets Halley and Wilson and properties of the grains: summary of workshop sponsored by the National Aeronautics and Space Administration, Washington, D.C.

and held at Cornell University, Ithaca, New York, August   IR observations can be used to determine the composition, mineral structure, and size distribution of cometary dust grains. These grains may be a repository for a large fraction of the heavy elements ejected into the interstellar medium by red giant Cited by: 7.

Infrared Observations of Comets Wilson and of the Halley and Properties Grains Martha S. Hanner, Editor Jet Propulsion Laboratory California Institute of Technology Pasadena, California Summary of a workshop sponsored by the National Aeronautics and Space Administration Washington, D.C., and held at Cornell University Ithaca, New York August Brownlee, D.E.

‘A Comparison of Halley Dust With Meteorites, Interplanetary Dust, and Interstellar Grains,’ in M.S. Hanner (ed.), Infrared Observations of Comets Halley and Wilson and Properties of the Grains, NASA Conf. Pub.pp. 66– The near infrared polarization and JHK colors of light scattered by dust grains in comet Halley were measured over a wide range in phase angle and heliocentric distance.

Colors were redder than solar with no statistically significant variation with phase angle, heliocentric distance, or pre- and post-perihelion. Observations of Comets Halley and Wilson reveal an emission feature peaking near μm, characteristic of C-H stretching in hydrocarbons.

A model based on a mixture of coated silicates and amorphous carbon grains produces a good spectral match to the available Halley data and is consistent with the compositional and morphological information derived from interplanetary dust particle studies and Halley flyby data.

The dark appearance of comets may be due to carbonaceous coatings on the dominant (by mass) silicates. An analysis of visible/near IF polarimetry of Comet Halley leads to a variation of the complex refractive index m = n - i x k of grain material with wavelength, i.e., a slight decrease of n from at lambda = micrometer to at lambda = micrometers, in constrast to an increase of k from at lambda = micrometer to at lambda micrometers.

The mass distribution. The Halley campaign gave us tantalizing first glimpses of the comet science possible with this new technology, evidenced, for example, by the many new spectral features detected in the infrared.

The techniques of photometry, imaging, and spectroscopy are reviewed in this chapter and their status at the time of the Halley observations is described. Infrared ( micrometers) observations of comet Bradfield (s) from three observatories are reported.

Silicate emission is prominent in all the data, from heliocentric distance r= to AU. The infrared observations of Comet Halley and Comet Wilson are reviewed and they are related to optical properties and composition of cometary grains.

Relevant laboratory studies are also discussed. Observations from two dates 5 Jan. and 7 Jan. are presented. The images were obtained with the Durham imaging polarimeter on the 1-m telescope of the Wise Observatory, Israel.

The observations were made through a broadband filter centered at microns with a micron effective bandwidth. This wavelength region should be dominated by continuum radiation. micron filter photometry of comet Wilson (l) was obtained on May 29 - June 2, (r = AU) and January 11(r = AU) at the NASA Infrared Telescope Facility.

Recent IR observations of Comets Halley, Wilson, and Bradfield have shown the existence of an emission feature falling at around microns. In this paper, it is shown that a good fit of both the. We present the analysis of μm infrared (IR) spectrophotometry (R ) of comet C/ O1 (Hale-Bopp), in conjunction with concurrent observations that extend the wavelength coverage of the spectral energy distribution from near- to far-infrared wavelengths.

The observations include temporal epochs preperihelion ( October and Infrared spectroscopy of comet P/Halley covering the wavelength range including the R(1) and P(2) lines of the ν3 band of CH4 around μm was carried out after perihelion on six nights between.

M.S. Hanner (Ed.), Infrared Observations of Comets Halley and Wilson and Properties of the Grains, NASA CP (), pp. Google Scholar Clark et al., Infrared observations of comets Halley and Wilson and properties of the grains: summary of workshop sponsored by the National Aeronautics and Space Administration, Washington, D.C.

and held at Cornell University, Ithaca, New York, August/. Workshop on "Infrared Observations of Comets Halley and Wilson and Properties of the Grains," Cornell University, Ithaca, NY, August, in press.

SANDFORD, S. A., AND R. WALKER Laboratory infrared transmission spectra of individual interplanetary dust particles from to 25 microns. Infrared Observations of Comets Halley and Wilson and Properties of the Grains Workshop,( Cornell University, Ithaca, NY)) Investigator(s): Hanner,M S; JPL Jet Propulsion Laboratory, California Institute of Technology, Pasadena, USA.Prior to the apparition of comet Halley, all attempts to determine the physical properties of cometary dust were limited to remote observations and the analysis of various particles captured by the Earth’s atmosphere.

We present the analysis of μm infrared (IR) spectrophotometry (R ) of comet C/ O1 (Hale-Bopp), in conjunction with concurrent observations that extend the wavelength coverage of the spectral energy distribution from near- to far-infrared observations include temporal epochs preperihelion ( October and February UT), near perihelion ( .