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The 2200 Å extinction hump and porous graphite grains

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Abstract

We discuss in this paper the possibility of interpreting the 2200 Å band occurring in the interstellar extinction curves as being attributed to porous graphite. The results show that grains with radii smaller than 0.015 μm and a porosity degree within the values 0.02≤f≤0.25 are able to fit satisfactorily the peak at 4.6 μm−1 and the band shape between 4 and 5.2 μm−1. Consideration of the expected density for such particles seems to confirm that interstellar grains may be porous but, at the same time, suggests that care must be taken when data concerning dust in the solar system are extrapolated to the interstellar space.

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References

  • Abadi, H. and Wickramasinghe, N. C.: 1976,Astrophys. Space Sci. 39, L31.

    Google Scholar 

  • Abadi, H., Joshi, P., Ramadurai, S. and Wickramasinghe, N. C.: 1976,Nature 263, 214.

    Google Scholar 

  • Blanco, A. and Bussoletti, E.: 1980,Astrophys. Space Sci. 67, 105.

    Google Scholar 

  • Bless, R. C. and Savage, B. D.: 1972,Astrophys. J. 171, 293.

    Google Scholar 

  • Bohren, C. F. and Wickramasinghe, N. C.: 1977,Astrophys. Space Sci. 50, 461.

    Google Scholar 

  • Gilra, D. P.: 1972, in A. D. Code (ed.),The Scientific Results from the Orbiting Astronomical ObservatoryOAO-2, NASA SP-310.

  • Greenberg, J. M. and Hong, S. S.: 1974,Proc. IAU Symp. 60, 155.

    Google Scholar 

  • Millman, P. M.: 1972,Nobel Symp. 21, 157.

    Google Scholar 

  • Stecher, T. P.: 1965,Astrophys. J. 142, 1683.

    Google Scholar 

  • Stecher, T. P.: 1969,Astrophys. J. 157, L125.

    Google Scholar 

  • Stecher, T. P. and Donn, B.: 1965,Astrophys. J. 142, 1681.

    Google Scholar 

  • Taft, E. A. and Philipp, H. R.: 1965,Phys. Rev. 138, A197.

    Google Scholar 

  • Tosatti, E. and Bassani, F.: 1970,Il Nuovo Cimento 65B, 161.

    Google Scholar 

  • Wickramasinghe, N. C. and Guillaume, C.: 1965,Nature 207, 366.

    Google Scholar 

  • Wickramasinghe, N. C. and Nandy, K.: 1974,Astrophys. Space Sci. 26, 123.

    Google Scholar 

  • Wickramasinghe, N. C., Lukes, T. and Dempsey, M. J.: 1974,Astrophys. Space Sci. 30, 315.

    Google Scholar 

Download references

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Authors and Affiliations

  1. Istituto di Fisica, Università degli Studi, Lecce, Italy

    A. Blanco, A. Borghesi, E. Bussoletti & S. Fonti

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  1. A. Blanco
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  2. A. Borghesi
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  3. E. Bussoletti
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  4. S. Fonti
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Blanco, A., Borghesi, A., Bussoletti, E. et al. The 2200 Å extinction hump and porous graphite grains. Astrophys Space Sci 68, 505–508 (1980). https://doi.org/10.1007/BF00639716

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  • DOI: https://doi.org/10.1007/BF00639716

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