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R And : ウィキペディア英語版
R Andromedae


R Andromedae (R And) is a Mira-type variable star in the constellation Andromeda. Its spectral class is type S, because it shows absorption bands of zirconium monoxide in its spectrum. It was among the stars found by Paul Merrill to show absorption lines of the unstable element technetium, establishing that nucleosynthesis must be occurring in stars.
==References==

* (Image R Andromedae )
* (x.astrogeek.org/ )
* ( ro-vibrational lines in the published high-resolution infrared spectrum of the S-type star R Andromedae )
* (chart R Andromedae )
* (astro.corlan.net/ )
* (Variable Stars )
* (phobos.jb.man.ac.uk/ )



抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「R Andromedae」の詳細全文を読む



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