Study the Radial Expansion of SN 1987A Using Counting Pixels Method


Physical properties of supernova 1987A were investigated including: Expansion velocity; Current mass; Radius; Temperature and the Rate of the expansion by applying Counting Pixels Method (CPM) in comparison with the application of the Povida and Self-Similar Solution theoretical models which in forced the idea for adopting such a model to be applied for supernova type II. Then tow results are found to be in a good agreement with the Self-Similar solution model rather than that of Povida model. The high density of the region that surrounded the exploding system acting as decelerating parameter and down the expansion velocity of the supernova from 3900 km·s-1 to 1200 km·s-1 during the past 23 years from the explosion, with a current size equal 0.39 pc, and with an expansion rate of 0.41 per a year.

Share and Cite:

B. Chiad, L. Karim and L. Ali, "Study the Radial Expansion of SN 1987A Using Counting Pixels Method," International Journal of Astronomy and Astrophysics, Vol. 2 No. 4, 2012, pp. 199-203. doi: 10.4236/ijaa.2012.24025.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] J. E. Van Zyl, “Variable Stars VI,” The Astronomical Society of Southern Africa, Johannesburg Centre Monthly Newsletter, 2003.
[2] J. C. Wheeler, “Cosmic Catastrophes: Exploding Stars, Black Holes, and Mapping the Universe,” 2nd Edition, Cambridge University Press, New York, 2007, pp. 79-135. doi:10.1017/CBO9780511536625.007
[3] W. D. Arnett, “On the Early Behavior of Supernova 1987A,” Astrophysical Journal, Vol. 331, No. 1, 1988, pp. 377-387. doi:10.1086/166564
[4] S. Park, D. Burrows, G. Garmire, R. McCray, J. Racusin and S. Zhekov, “Chandra Observations of Supernova 1987A,” Astrophysical Journal, Vol. 937, 2007, pp. 43-50.
[5] S. Jogee, “Introduction to Astronomy,” 2006.
[6] R. Wilson, “Astronomy through the Ages: The Story of the Human Attempt to Understand the Universe,” Taylor & Francis e-Library, London, 2005.
[7] W. D. Arnett, R. Bahcall, J. Kirshner and S. Woosley, “SUPERNOVA 1987A,” Annual review of Astronomy and Astrophysics, Vol. 27, 1989, pp. 629-700. doi:10.1146/annurev.aa.27.090189.003213
[8] B. W. Carroll and D. A. Ostlie, “An Introduction to Modern Astrophysics,” 2nd Edition, Pearson Education, San Francisco, 2007, pp. 524-542.
[9] R. Roger and T. Landecker, “Supernova Remnants and the Interstellar Medium,” Cambridge University Press, Cambridge, 1988, pp. 12-20.
[10] R. Schaeffer, “SN 1987A. A Review,” Acta Phsica Polonica, Vol. 12, 1990, pp.357-376.
[11] B. J. Becker, “Eclecticism, Opportunism, and the Evolution of a New Research Agenda: William and Margaret Huggins and the Origins of Astrophysics,” Ph.D. Thesis, University of California, Oakland, 1993.
[12] B. M. Gaensler, “Barrels, Jets and Smoke-Rings: Understanding the Bizarre Shapes of Radio Supernova Remnants,” Ph.D. Thesis, University of Sydney, Sydney, 1999.
[13] E. J. Wampler and A. Richichi, “Observations of Nebular Emission Lines towards SN 1987A,” Astronomy and Astrophysical Journal, Vol. 217, No. 1-2, 1989, pp. 31-34.
[14] A. Tziamtzis, P. Lundqvist, P. Gr?ningsson and S. Nasoudi-Shoar, “The Outer Rings of SN 1987A?” Astrophysical Journal, Vol. 527, 2010.
[15] E. N. Michle, “The Structure and Development of Supernova Remnant 1987A,” Ph.D. Thesis, University of Colorado, Colorado, 1998.
[16] K. E. Kj?r, “Integral Field Spectroscopy Observations of SN 1987A,” Ph.D. Thesis, University of Munich, Munich, 2007.
[17] J. Kolena, “Chandra/ds9 (the Windows Version) Faq Page,” 2009.
[18] S. Palen, “Properties of Supernova,” 2000.
[19] R. Al-Sarraf, “New Model for SN 1987A,” MSc. Thesis, University of Baghdad, Baghdad, 1990.
[20] T. T. Arny, “Exploration: An Introduction to Astronomy,” 2nd Edition, McGraw-Hill Companies, New York, 1998, pp. 390-391.
[21] H. Karttunen, P. Kr?ger, H. Oja, M. Poutanen and K. Donner, “Fundamental Astronomy,” 5th Edition, Springer-Verlag, New York, Berlin, Heidelberg, 2007, pp. 107-224. doi:10.1007/978-3-540-34144-4
[22] A. Povida, “Nova, Novides, ET. Supernovae,” France: Centre National de la Recherche Scintifique, Vol. 121, 1964, pp.221-230.
[23] J. Lequeux, “The Interstellar Medium,” Springer-Verlag, Berlin, Heidelberg, 2005, pp. 275-285.
[24] J. L. Racusin, S. Park, S. Zhekov, D. Burrows, G. Garmire and R. McCray, “X-Ray Evolution of SN 1987A: The Radial Expansion,” The Astrophysical Journal, Vol. 703, No. 2, 2009, pp. 1752-1759. doi:10.1088/0004-637X/703/2/1752
[25] L. T. Ali, “Theoretical Study of the Physical Parameters of the Supernova 1987A,”MSc. Thesis, University of Baghdad, Baghdad, 2011.

Copyright © 2023 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.