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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

has been cited by the following article:

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

  AUTHORS: Baha T. Chiad, Layth M. Karim, Lana T. Ali

  KEYWORDS: Supernovae; Individual (SN 1987A)-Supernova Remnants

  JOURNAL NAME: International Journal of Astronomy and Astrophysics, Vol.2 No.4, December 31, 2012

  ABSTRACT: 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.