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AAT Observations of the Interstellar Medium towards SN 1987A

Published online by Cambridge University Press:  25 April 2016

M. Pettini
M. Pettini*
Affiliation:
Anglo-Australian Observatory
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Abstract

The exceptional brightness of SN 1987A has provided a unique opportunity to probe intervening gas clouds in the disk and halo of our Galaxy and in the Large Magellanic Cloud, as well as intergalactic matter between the two. At the AAO we have exploited this opportunity in two ways: in searches for very weak interstellar features requiring exceptionally high signal-to-noise ratio spectra, and in recording known interstellar lines with unprecedentedly high spectral resolution. We are also monitoring photographically the evolution of the light-echoes to map the three-dimensional distribution of interstellar matter near the supernova. Surprisingly high column densities of million-degree gas have been found in the LMC through the first detection of [Fe X] in absorption. The hot gas may fill the interior of a ‘superbubble’, created by the combined effects of previous supernovae in this active region of star-formation; this cavity may be related to the shells of interstellar matter giving rise to the light-echoes. The ultra-high resolution observations, which required the rapid construction of a dedicated new spectrograph, were successful in resolving the hyperfine structure of the sodium D lines in several interstellar clouds. This implies that the clouds are at temperatures of at most 170 K and have internal turbulent velocities of no more than 0.3 km s−1, even though some are moving with high velocities relative to the Sun.

Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 7 , Issue 4 , 1988 , pp. 527 - 534
Copyright
Copyright © Astronomical Society of Australia 1988

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References

Allen, D.A., Couch, W.J., Malin, D.F. 1988, IAU Cire. #4633.Google Scholar
Andreani, P., Feilet, R., Vidal-Madjar, A., 1987, Nature 326, 770.CrossRefGoogle Scholar
Black, J.H., van Dishoeck, E.F., 1988, Astrophys. J. 331, 986.Google Scholar
Blades, J.C., Wheatley, J.M., Panagia, N., Grewing, M., Pettini, M., Wamsteker, W., 1988, Astrophys. J. 334, 308.CrossRefGoogle Scholar
Blades, J.C., Wynne-Jones, I., Wayte, R.C., 1980, Mon. Not. R. Astron. Soc. 193, 849.Google Scholar
Bregman, J.N., 1980, Astrophys. J. 236, 577.Google Scholar
Bruce, CF., Hannaford, P., 1971, Spectrochimica Acta, 26B, 207.Google Scholar
Chevalier, R.A., Emmering, R.T., 1988, Astrophys. J. Lett. 331, L105.Google Scholar
Couch, W.J., Allen, D.A., Malin, D.F., 1989, in preparation.Google Scholar
Crotts, A.P.S., 1988, Astrophys. J. Lett. 333, L51.Google Scholar
Dickey, J.M., Salpeter, E.E., Terzian, Y., 1978, Astrophys. J. Suppl. Ser. 36, 77.Google Scholar
Dopita, M.A., et al. 1988, Proc. Astron. Soc. Ausi. 7, 243.Google Scholar
Dopita, M.A., Mathewson, D.S., Ford, V.L., 1985, Astrophys. J. 297, 599.Google Scholar
Edgar, R.J., Chevalier, R.A., 1986, Astrophys. J. Lett. 310, L27.CrossRefGoogle Scholar
Fransson, C., Cassatella, A., Gilmozzi, R., Panagia, N., Wamsteker, W., Kirshner, R.P., Sonneborn, G., 1989, Astrophys. J. 336, 429.Google Scholar
Gillingham, P.R., 1988, in Instrumentation for Ground-Based Optical Astronomy; Present and Future,> ed. Robinson, L.B. (New York: Springer-Verlag), p.134 CrossRefGoogle Scholar
Gouiffes, C., et al. 1988, Astron. Astrophys. 198, L9.Google Scholar
Hobbs, L.M., 1969a, Astrophys. J. 157, 165.CrossRefGoogle Scholar
Hobbs, L.M., 1969b, Astrophys. J. 157, 135.Google Scholar
Hobbs, L.M., 1974, Astrophys. J. 191, 395.Google Scholar
Hobbs, L.M., 1984a, Astrophys. J. 280, 132.Google Scholar
Hobbs, L.M., 1984b, Astrophys. J. Lett. 284, L47.Google Scholar
Hobbs, L.M., 1985, Astrophys. J. 298, 357.Google Scholar
Jenkins, E.B., 1987, in Exploring the Universe with the IUE satellite, ed. Kondo, Y., (Dordrecht: D. Reidel), p.531.CrossRefGoogle Scholar
Jenkins, E.B., Wallerstein, G., Silk, J., 1984, Astrophys. J. 278, 649.Google Scholar
Kahn, S.M., Jakobsen, P., 1988, Astrophys. J. 329, 406.Google Scholar
Marshall, F.J., Clark, G.W., 1984, Astrophys. J. 287, 633.Google Scholar
McCray, R., Kafatos, M., 1987, Astrophys. J. 317, 190.CrossRefGoogle Scholar
McGee, R.X., Newton, L.M., Morton, D.C., 1983, Mon. Not. R. Astron. Soc. 205, 1191.Google Scholar
Meaburn, J., 1980, Mon. Not. R. Astron. Soc. 192, 365.CrossRefGoogle Scholar
Mills, B.Y., Turtle, A.J., Little, A.G., Durdin, J.M., 1984, Aust. J. Phys. 37, 321.Google Scholar
Moore, CE., Minnaert, M.G.J., Houtgast, J., 1966, The Solar Spectrum 29S5 Å to 8770 Å, NBS Monograph 61.CrossRefGoogle Scholar
Morton, D.C., 1975, Astrophys. J. 197, 85.Google Scholar
Pettini, M., D’Odorico, S., 1986, Astrophys. J. 310, 700.Google Scholar
Pettini, M., Gillingham, P.R., 1989, in preparation.Google Scholar
Pettini, M., Stathakis, R., D’Odorico, S., Molaro, P., Vladilo, G., 1989, Astrophys. J. 840, in press.Google Scholar
Pettini, M., Wayte, S., 1989, in preparation.Google Scholar
Savage, B.D., 1988, in QSO Absorption Lines: Probing the Universe, eds. Blades, J.C. Turnshek, D.A. Norman, C.A., Cambridge University Press, p.195.Google Scholar
Savage, B.D., Bohlin, R.C., Drake, J.F., Budich, W., 1977, Astrophys. J. 216, 291.CrossRefGoogle Scholar
Savage, B.D., de Boer, K.S., 1979, Astrophys. J. Lett. 230, L77.CrossRefGoogle Scholar
Savage, B.D., Jenkins, E.B., Joseph, CL., de Boer, K.S. 1989, Astrophys. J. in press.Google Scholar
Singh, K.P., Nousek, J.A., Burrows, D.N., Gannire, G.P., 1987, Astrophys. J. 313, 185.Google Scholar
Songaila, A., Blades, J.C., Hu, E.M., Cowie, L.L., 1986, Astrophys. J. 303, 198.Google Scholar
Spitzer, L., 1978, Physical Processes in the Interstellar Medium, J. Wiley and Sons, p.227.Google Scholar
Suntzeff, N.B., et al. 1988, Nature 334, 135.Google Scholar
Walker, D.D., Diego, F., 1985, Mon. Not. R. Astron. Soc. 217, 355.Google Scholar
Wampler, E.J., Richichi, A., 1988, ESO Messenger, 52, 14.Google Scholar