Can you guess why the microwave emissions from OH26.5+0.6 show two peaks? Every OH maser star does.
For more on this star, check out this paper:
• O. Chesneau, T. Verhoelst, B. Lopez, L. B. F. M. Waters, Ch. Leinert, W. Jaffe, R. Köhler, A. de Koter and C. Dijkstra, The mid-IR spatially resolved environment of OH 26.5+0.6 at maximum luminosity,
https://www.aanda.org/articles/aa/pdf/2005/20/aa2235-04.pdf
For more on astrophysical masers:
https://en.wikipedia.org/wiki/Astrophysical_maser
This particular star is a 'Mira variable', and they are quite interesting too:
https://en.wikipedia.org/wiki/Mira_variable
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