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Chapter 20: Problem 24

Why is SN 1987A so interesting to astronomers? In what ways was it not a typical supernova?

Short Answer

Expert verified
SN 1987A is significant to astronomers because of its proximity to earth, enabling detailed study. It's unusual because its progenitor was a blue supergiant, not a red one, and it has a unique light curve, emission lines, and visible remnants.

Step by step solution

01

Define SN 1987A

SN 1987A is a supernova situated in the Large Magellanic Cloud, a close-by galaxy, and was first witnessed on earth on February 23, 1987. It is unique because it is the nearest supernova explosion observed in recent history.
02

Describe the interest of astronomers towards SN 1987A

SN 1987A is interesting to astronomers because it has provided them with a rare chance to study the life-cycle and characteristics of a supernova in detail due to its relative proximity to earth. Additionally, it gave an opportunity to confirm essential astrophysical theories, including the neutrino emissions from a supernova.
03

Highlight the unusual characteristics of SN 1987A

SN 1987A differed in several ways from a typical supernova. Firstly, its progenitor star, a blue supergiant named Sanduleak -69 202, was not a red supergiant as typical supernova progenitors. Secondly, peculiarities in its light curve, with a distinct delay in brightness, and emission lines, which are atypical compared to standard supernovae. Lastly, the three concentric rings visible in the supernova remnants are uncommon and are still a topic of research.
04

Conclude

SN 1987A proved to be valuable to astronomers for their research, solidifying the understanding of supernova dynamics. Its unique characteristics also presented new perspectives into supernova research, adding understanding to the diverse behaviors of supernovae.

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