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Type II Supernova Photospheres and the Distance to Supernova 1987A

Published online by Cambridge University Press:  12 April 2016

Manorama Chilukuri  and
Robert V. Wagoner
Manorama Chilukuri
Affiliation:
Department of Physics, Stanford UniversityStanford, California 94305-4060, USA
Robert V. Wagoner
Affiliation:
Department of Physics, Stanford UniversityStanford, California 94305-4060, USA

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Among the many historic opportunities provided by the recent supernova in the LMC is that to improve our understanding of the physical conditions in the neighborhood of supernova photospheres, even though 1987A was initially characterized by radial and time scales smaller (by a factor 5–10) than “standard” more luminous SNII. Two consequences of this understanding, which we shall focus on in this contribution, are (a) an estimate of the (frequency-dependent) location and thickness of the photosphere and (b) the only direct determination of the distance of the supernova (via the generalized Baade method). We find that the photosphere is sharp enough to allow the use of plane-parallel geometry in the calculation of the emergent continuum spectral flux, if we confine our attention to those epochs (temperature T ~ 5000−6000 K) at which hydrogen is recombining at the photosphere. We also find that the distance to this supernova is 43 ± 4 kpc. The reliability of this determination should improve when accurate spectrophotometric data for dates other than March 1 become available to us.

Type
Part III. Chemical and Dynamical Structures of Exploding Stars
Information
International Astronomical Union Colloquium , Volume 108: Atmospherics Diagnostics of Stellar Evolution: Chemical Peculiarity, Mass Loss, and Explosion , 1988 , pp. 295 - 304
Copyright
Copyright © Springer-Verlag 1988

References

Refertences

Baade, W. 1926, Astr. Nach., 228, 359.Google Scholar
Blanco, V.M., Gregory, B., Hamuy, M., Heathcote, S.R., Phillips, M.M., Suntzeff, N.B., Temdrup, D.M.. Walker, A.R., Williams, R.E., Pastoriza, M.G., Storchi-Bergmann, T., and Matthews, J. 1987, Ap. J. 320, 589.Google Scholar
Bouchet, P., Stanga, R., Le Bertre, T., Epchtein, N., Hamann, W.R., and Lorenzetti, D. 1987, Astron. Ap., 177, L9.Google Scholar
Branch, D. 1980, in Supernova Spectra, ed. Meyerott, R. and Gillespie, G.H. (New York: Am. Inst. Phys.).Google Scholar
Branch, D. 1987, Ap. J., 320, L23.Google Scholar
Branch, D., and Patchett, B. 1973. M.N.R.A.S., 161, 71.Google Scholar
Caldwell, J.A.R., and Coulson, I.M. 1986. M.N.R.A.S., 218, 223.Google Scholar
Chiosi, C., and Pigatto, L. 1986. Ap., J., 308, 1.Google Scholar
Clayton, G.C., and Martin, P.G. 1985, Ap. J., 288, 558.Google Scholar
Danziger, I.J., Fosbury, R.A.E.. Alloin, D., Cristiani, S., Dachs, J., Gouiffes, C., Jarvis, B., and Sahu, K.C. 1987, Astron. Ap., 177, L13.Google Scholar
Hershkowitz, S., Linder, E., and Wagoner, R.V. 1986, Ap. J. 301, 220.Google Scholar
Hershkowitz, S., and Wagoner, R.V. 1987, Ap. J., 322, 967 Google Scholar
Höflich, P., Wehrse, R., and Shaviv, G. 1986. Astron. Ap., 163, 105.Google Scholar
Karp, A.H., Lasher, G., Chan, K.L., and Salpeter, E.E. 1977, Ap. J., 214, 161 Google Scholar
Kirshner, R.P., and Kwan, J. 1974, Ap. J., 193, 27.Google Scholar
Kirshner, R.P., Sonneborn, G., Crenshaw, D.M., and Nassiopoulos, G.E. 1987, Ap. J. 320, 602.Google Scholar
Meikle, W.P.S., Matcher, S.J., and Morgan, B.L. 1987, Nature, 329, 608.Google Scholar
Menzies, J.W., Catohpole, R.M., van Vuuren, G., Winkler, H., Laney, C.D., Whitelock, P.A., Cousins, A.W.J., Carter, B.S., Marang, F., Lloyd Evans, T.H.H., Roberts, G., Kilkenny, D., Spencer Jones, J., Sekiguchi, K., Fairall, A.P., and Wolstencroft, R.D. 1987, M.N.R.A.S., 227, 39P.Google Scholar
Mihalas, D. 1978, Stellar Atmospheres (San Francisco: W.H. Freeman).Google Scholar
Nisenson, P., Papaliolios, C., Karovska, M., and Noyes, R. 1987, Ap. J., 320, 15.Google Scholar
Phillips, M.M. 1987, Bull. Am. Astron. Soc. 19, 722.Google Scholar
Schommer, R.A., Olszewski, E.W., and Aaronson, M. 1984, Ap. J., 285, L53.CrossRefGoogle Scholar
Shabbrook, R.R., and Visvanathan, N. 1987, M.N.R.A.S., 225, 947 Google Scholar
Sonneborn, G., Altner, B., and Kirshner, R.P. 1987, Ap. J., in press.Google Scholar
Visvanathan, N. 1985. Ap. J. 288, 182.Google Scholar
Wagoner, R.V. 1980, in Physical Cosmology, ed. Balian, R., Audouze, J., and Schramm, D.N. (Amsterdam: North-Ho1land).Google Scholar
Wagoner, R.V. 1981. Ap. J., 250, L65.Google Scholar
Wagoner, R.V. 1987, in Proceedings of the Vatican Observatory Conference on Theory and Observational Limits in Cosmology, in press.Google Scholar
Walker, A.R. 1985, M.N.R.A.S., 212, 343 Google Scholar
Welch, D.H., McLaren, R.A., Madore, B.F., and McAlary, C.W. 1987, Ap. J., 321, 162.Google Scholar