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SN 1987a: A Progress Report

Published online by Cambridge University Press:  25 April 2016

M. A. Dopita ,
N. Achilleos ,
J. A. Dawe ,
C. Flynn ,
S. J. Meatheringham  and
R. D. McNaught
M. A. Dopita
Affiliation:
Mt. Stromlo and Siding Spring Observatories, Australian National University
N. Achilleos
Affiliation:
Mt. Stromlo and Siding Spring Observatories, Australian National University
J. A. Dawe
Affiliation:
Mt. Stromlo and Siding Spring Observatories, Australian National University
C. Flynn
Affiliation:
Mt. Stromlo and Siding Spring Observatories, Australian National University
S. J. Meatheringham
Affiliation:
Mt. Stromlo and Siding Spring Observatories, Australian National University
R. D. McNaught
Affiliation:
United Kingdom Schmidt Telescope Unit
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Abstract

It now appears almost certain that the precursor of SN 1987a was the brighter of the components of Sk-69 202, a blue supergiant, with a precursor mass of perhaps 12-16 solar masses. Prior to the explosion the precursor had a core mass of order six solar masses, and 0.1 to 0.2 solar masses of residual hydrogen envelope. The compact nature of this star can account for many of the odd features of the subsequent light curve and spectral evolution.

An analysis of the light curve and colour evolution shows four distinct epochs, which probably relate to the initial expansion of the fireball and the escape of shock-deposited thermal energy, the hydrogen-rich layers becoming optically thin, the exposure of the helium core, and the increasing transparency of the helium core.

The supernova appeared to be at its maximum on May 10, but is dimmer than a normal Type II because its light is apparently derived from recombinations and the radioactive decay of 56Ni to 56Co to 56Fe rather than by the thermal energy deposited by the passage of the shock.

Type
Stellar
Information
Publications of the Astronomical Society of Australia , Volume 7 , Issue 2 , 1987 , pp. 141 - 146
Copyright
Copyright © Astronomical Society of Australia 1987

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References

Aglietta, M., Badino, G., Blogna, G. F., Castagnoli, C., Castellina, A., Fulgione, W., Galeotti, P., Saavedra, O., Trinchero, G., Vernetto, S., Dadykin, V. L., Kortchaguin, V.B., Malguin, A. S., Ryassny, V. G., Ryazhskaya, O. G., Talochkin, P. V., Zatespin, G. T., and Yakushev, V. F. 1987, (preprint).Google Scholar
Arnett, W. D., 1980, Astrophys. J., 237, 541.Google Scholar
Arnett, W. D., 1982, Astrophys. J., 253, 785.Google Scholar
Arnett, W. D., 1987a, Astrophys. J. (Lett.), 319, 136.Google Scholar
Arnett, W. D., 1987b, Astrophys. J. (Lett.) in press.Google Scholar
Begelman, M.C., and Sarazin, C. L., 1986, Astrophys. J. (Lett.), 302, L59.Google Scholar
Bessell, M. S., 1987, (private communication).Google Scholar
Bionta, R. M., Blewitt, G., Bratton, C.B., Casper, D., Ciocio, A., Claus, R., Cortez, B., Crouch, M., Dye, S. T., Errede, S., Foster, G. W., Gajewski, W., Ganezer, K. S., Goldhaber, M., Haines, T. J., Jones, T. W., Kielczewska, D., Kropp, W. R., Learned, J. G., LoSecco, J. M., Mattews, J., Miller, R., Mudan, M. S., Park, H. S., Price, L. R., Reines, F., Shultz, J., Seidel, S., Shumard, E., Sinclair, D., Sobel, H. W., Stone, J. L.,Google Scholar
Sulak, L. R., Svboda, R., Thornton, G., van der Velde, J.C., and Wuest, C, 1987, (preprint).Google Scholar
Carney, B. W., 1980, Publ. Ast. Soc. Pacific, 92, 56.Google Scholar
Cristiani, S., Babel, J., Barwig, H., Clausen, J. V., Gouiffes, C., Günter, T., Helt, B. E., Heynderickx, D., Loyola, P., Magnusson, P., Monderen, P., Rabattu, X., Sauvageout, J. L., Schoembs, R., Schwarz, H., and Steenman, F., 1987, Astron. Astrophys (Lett.), 177, L5.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. Astrophys (Lett.), 177, L13.Google Scholar
Filippenko, A. V., and Sargent, W. L. W., 1985, Nature, 316, 407.Google Scholar
Filippenko, A. V., and Sargent, W. L. W., 1986, Astron. J., 91, 691.Google Scholar
Hillebrandt, W., Höflich, P., Kafka, P., Müller, E., Schmidt, H. U., and Truran, J. W., 1987, Astronomy and Astrophysics (in press).Google Scholar
Hirata, K., Kajita, T., Koshiba, M., Nakahata, M., Oyama, Y., Sato, N., Suzuki, A., Takita, M., Totsuka, Y., Kifune, T., Suda, T., Takahashi, K., Tanimoi, T., Miyano, K., Yamada, M., Beier, T., Kim, S.B., Mann, A.K., Newcomer, F. M., Van Berg, R., and Zhang, W., 1987, Phys. Rev. Lett., (in press).Google Scholar
Karosvska, M., Nisenson, P., Noyes, R., and Papaliolios, C., 1987, IAU Circular #4382.Google Scholar
Kirshner, R. P., and Kwan, J., 1974, Astrophys. J., 193, 27.Google Scholar
Marcher, S. J., Neikle, W. P. S., and Morgan, B. L., 1987, IAU Circular #4391.Google Scholar
McNamara, D. H., and Feltz, K. A. Jr., 1980, Pub. Astron. Soc. Pacific, 92, 587.Google Scholar
Rousseau, J., Martin, N., Prévot, L., Rebeirot, A. R., and Brunet, J. P., 1978, Astron. Astrophys. Suppl. Ser., 31, 243.Google Scholar
Schaeffer, R., Cassé, M., and Cahen, S., 1987, Astrophys. J. (Lett.), 316, L31.Google Scholar
Schaeffer, R., 1987, Private Communication.Google Scholar
Shigeyama, T., Nomoto, K., Hashimoto, M., and Sugimoto, D., 1987, Nature, 328, 320.Google Scholar
Storey, M.C., and Manchester, R. N.. 1987, Nature, 329, 421.Google Scholar
Turtle, A. J., Campbell-Wilson, D., Bunton, J. D., Jauncey, D. L., Kesteven, M. J., Manchester, R. N., Norris, R. P., Storey, M. C. and Reynolds, J. F., 1987, Nature, 327, 38.Google Scholar
Vidal-Madjar, A., Andreani, P., Cristiani, S., Ferlet, R., Lanz, T., and Vladilo, G., 1987, Astron. Astrophys., 177, L17.Google Scholar
Vladilo, G., 1987, The Messenger (E.S.O.), 47, 29.Google Scholar
Wampler, E. J., Truran, J. W., Lucy, L.B., Höflich, P., and Hillebrandt, W., 1987, Astron. Astrophys. (Lett.), 182, L51.Google Scholar
West, R. M., Lauberts, A., Jørgensen, H. E., and Schuster, H. E., 1987, Astron. Astrophys (Lett.), 177, L1.Google Scholar
White, G. L., and Malin, D. F., 1987a, IAU Circular #4330.Google Scholar
White, G. L., and Malin, D. F., 1987b, Nature, 327, 36.Google Scholar
Wood, P. R., 1987, Private Communication.Google Scholar
Wood, P. R., and Faulkner, D. J., 1987, Proc. Astron. Soc. Aust., 7, 75.Google Scholar