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The local interstellar medium

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Abstract

The local interstellar medium can be probed in different ways: by analyzing low energy X-ray data in the range 0.1–0.4 keV, where the radiation is absorbed by the interstellar gas at column densities in excess of about 1020 cm-2 — and can therefore be regarded as ‘local’, by determining the absorption of stellar emission spectra from nearby stars along their lines of sight by intervening gas and by directin situ measurements of those components which penetrate the heliosphere sufficiently far, provided they can be distinguished from interplanetary material. The current status of these different investigations gives the following picture: the solar system is surrounded by a ‘bubble’ of hot gas (density 0.005cm-3, temperature 106 K) out to several tens of parsecs. More locally it is embedded in a small warm cloud of density 0.07cm-3, temperature 7000 K, column density ∼ 5 × 1017 cm-2 — which gives a mass of about 0.1M ⊙. The transition to the heliosphere is governed by solar UV ionization, snowploughing of the interstellar gas by the outwardly expanding solar wind and the bow shock. The heliosphere is the region inside the solar wind terminal shock. Classically it would be regarded as not yet affected by (or aware of) the obstacle ahead. Practically, the existence of the interstellar medium makes itself felt even far inside the heliosphere by the penetration of neutral gas, dust, plasma waves, shock accelerated particles and cosmic rays. These are the local ‘probes’ of the interstellar medium.

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References

  • Bowyer, C. S., Field, G. B., and Mack, J. E.: 1968,Nature 217, 32.

    Google Scholar 

  • Burrows, D. N. and Mendenhall, J. A.: 1991,Nature 351, 629.

    Google Scholar 

  • Chassefiere, E., Bertaux, J. L., Lallement, R., Sandel, B. R., and Broadfoot, L.: 1988,Astron. Astrophys. 199, 304.

    Google Scholar 

  • Clayton, G. C. and Mathis, J. S.: 1988,Astrophys. J. 327, 911.

    Google Scholar 

  • Cowie, L. L., McKee, C. F., and Ostriker, J. P.: 1981,Astrophys. J. 247, 408.

    Google Scholar 

  • Cox, D. P. and Anderson, P. R.: 1982,Astrophys. J. 253, 268.

    Google Scholar 

  • Cox, D. P. and Reynolds, R. J.: 1987,Ann. Rev. Astron. Astrophys. 25, 303.

    Google Scholar 

  • Dyson, J. E., Hartquist, T. W., and Biro, S.: 1993,Monthly Notices Roy. Astron. Soc. 261, 340.

    Google Scholar 

  • Egger, R.: 1993, Ph.D. Thesis, MPE Report249

  • Egger, R.: 1995, in A. Ferrara, C. Heiles, C. F. McKee, P. Shapiro (eds.), ‘The Physics of the Interstellar and the Intergalactic Medium’,Publ. Astron. Soc. Pacific 80.

  • Egger, R. and Aschenbach, B.: 1995,Astron. Astrophys. 294, L25.

    Google Scholar 

  • Field, G. B., Goldsmith, D. W., and Habing, H. J.: 1969,Astrophys. J. 155, L49.

    Google Scholar 

  • Frisch, P. C. and York, D. G.: 1983,Astrophys. J. 271, L59.

    Google Scholar 

  • de Geus, E. J.: 1992,Astron. Astrophys. 262, 258.

    Google Scholar 

  • Grün, E., Zook, H. A., Baguhl, M., Balogh, A., Bame, S. J., Fechtig, H., Forsyth, R., Hanner, M. S., Horanyi, M., Kissel, J., Lindblad, B.-A., Linkert, D., Mann, I., McDonnell, J. A. M., Morfill, G. E., Phillips, J. L., Polanskey, C., Schwehm, G., Siddique, N., Staubach, P., Švestka, J., and Taylor, A.: 1993,Nature 362, 428.

    Google Scholar 

  • Grün, E., Gustafson, B., Mann, I., Baguhl, M., Morfill, G. E., Staubach, P., Taylor, A., Zook, H. A.: 1994,Astron. Astrophys. 286, 915.

    Google Scholar 

  • Hartquist, T., Havnes, O., and Morfill, G. E.: 1993,Fundamentals Cosm. Phys. 15, 107.

    Google Scholar 

  • Hartquist, T.W.: 1994,Astrophys. Space Sci., in press.

  • Hartquist, T. W. and Dyson, J. E.: 1988,Astrophys. Space Sci. 144, 615.

    Google Scholar 

  • Hartquist, T. W. and Morfill, G. E.: 1983,Astrophys. J. 266, 271.

    Google Scholar 

  • Havnes, O., Morfill, G. E., and Melandsø, F.: 1992,Icarus 98, 141.

    Google Scholar 

  • Holzer, T.E.: 1989,Ann. Rev. Astron. Astrophys. 27, 199.

    Google Scholar 

  • Ikeuchi, S.: 1978,Publ. Astron. Soc. Japan 30, 563.

    Google Scholar 

  • Innes, D. E. and Hartquist, T. W.: 1984,Monthly Notices Roy. Astron. Soc. 209, 7.

    Google Scholar 

  • Kulsrud, R. M. and Pearce, W. P.: 1969,Astrophys. J. 156, 445.

    Google Scholar 

  • Levy, E. H. and Jokipii, J. R.: 1976,Nature 264, 424.

    Google Scholar 

  • Lockman, F. J., Jahoda, K., and McCammon, D.: 1986,Astrophys. J. 302, 432.

    Google Scholar 

  • Mathis, J.S.: 1990,Ann. Rev. Astron. Astrophys. 28, 37.

    Google Scholar 

  • McCammon, D., Burrows, D. N., Sanders, W. T., and Kraushaar, W. L.: 1983,Astrophys. J. 269, 107.

    Google Scholar 

  • McKee, C. F. and Ostriker, J. P.: 1977,Astrophys. J. 218, 148.

    Google Scholar 

  • Meaburn, J., Walsh, J. R., Clegg, R. E. S., Walter, N. A., Taylor, D., and Berry, D. S.: 1992,Monthly Notices Roy. Astron. Soc. 255, 177.

    Google Scholar 

  • Möbius, E., Hovestadt, D., Klecker, B., Scholer, M., Gloeckler, G., and Ipavich, F. M.: 1985,Nature 318, 426.

    Google Scholar 

  • Morfill, G. E. and Grün, E.: 1979,Planetary Space Sci. 27, 1283.

    Google Scholar 

  • Morfill, G. E. and Hartquist, T. W.: 1985,Astrophys. J. 297, 194.

    Google Scholar 

  • Morfill, G. E. and Scholer, M. (eds.): 1987,Physical Processes in Interstellar Clouds, D. Reidel Publ. Co., Dordrecht, Holland.

    Google Scholar 

  • Morfill, G. E., Spruit, H., and Levy, E. H.: 1993, in E. H. Levy and J. I. Lunine (eds.),Protostars and Planets III', University of Arizona Press, Tuscon, p. 939.

    Google Scholar 

  • Nittmann, J., Falle, S. A. E. G., and Gaskell, P. H.: 1982,Monthly Notices Roy. Astron. Soc. 201, 833.

    Google Scholar 

  • Pryor, W. R., Ajello, J. M., Barth, C. A., Hord, C. W., Stewart, A. I. F., Simmons, K. E., McClintock, W. E., Sandel, B. R., Shemanksy, D. E.: 1992,Astrophys. J. 394, 363.

    Google Scholar 

  • Ripken, H. W. and Fahr, H. J.: 1983,Astron. Astrophys. 122, 181.

    Google Scholar 

  • Sanders, W. T., Kraushaar, W. L., Nousek, J. A., and Fried, P. M.: 1977,Astrophys. J. 217, L87.

    Google Scholar 

  • Snowden, S. L., Cox, D. P., McCammon, D., and Sanders, W. T.: 1990,Astrophys. J. 354, 211.

    Google Scholar 

  • Snowden, S. L., Mebold, U., Hirth, W., Herbstmeier, U., and Schmitt, J. H. M. M.: 1991,Science 252, 1529.

    Google Scholar 

  • Snowden, S. L., Hasinger, G., Jahoda, K., Lockman, F. J., McCammon, D., and Sanders, W. T.: 1994,Astrophys. J. 430, 601.

    Google Scholar 

  • Snowden, S. L., Freyberg, M. J., Schmitt, J. H. M. M., Plucinsky, P. P, Trümper, J., Voges, W., Edgar, R. J., McCammon, D., and Sanders, W. T.: 1995,Astrophys. J. in press.

  • Shull, J. M. and Van Steenberg, M. E.: 1985,Astrophys. J. 294, 599.

    Google Scholar 

  • Sonett, C., Morfill, G. E., and Jokipii, J. R.: 1987,Nature 330, 458.

    Google Scholar 

  • Tinbergen, J.: 1984, inNASA, GSFC Local Interstellar Medium,81, 145.

    Google Scholar 

  • Vrba, F. J., Coyne, G. V. S. J., and Tapia, S.: 1993,Astron. J. 105, No. 3, 1010.

    Google Scholar 

  • Warwick, R. S., Barber, C. R., Hodkin, S. T., and Pye, J. P.: 1993,Monthly Notices Roy. Astron. Soc. 262, 289.

    Google Scholar 

  • Witte, M., Rosenbauer, H., Keppler, E., Fahr, H., Hemmerich, P., Lauche, H., Loidl, A., and Zwick, R.: 1992,Astron. Astrophys.Suppl. Ser. 92, 333.

    Google Scholar 

  • Witte, M., Rosenbauer, H., Banaszkiewicz, M., and Fahr, H.: 1993,Astron. Space Sci. 13(6), 121.

    Google Scholar 

  • Woodward, P. R.: 1976,Astrophys. J. 207, 484.

    Google Scholar 

  • Yoshioka, S. and Ikeuchi, S.: 1990,Astrophys. J. 360, 352.

    Google Scholar 

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Authors and Affiliations

  1. Max-Planck-Institut für Extraterrestrische Physik, D-85740, Garching, Germany

    R. J. Egger, M. J. Freyberg & G. E. Morfill

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  1. R. J. Egger
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  2. M. J. Freyberg
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  3. G. E. Morfill
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Egger, R.J., Freyberg, M.J. & Morfill, G.E. The local interstellar medium. Space Sci Rev 75, 511–536 (1996). https://doi.org/10.1007/BF00833342

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