Sakurais Novalike Variable in Sagittarius: Ejecta and Light Echoes

Physics

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Hst Proposal Id #7207 Interstellar Medium

Scientific paper

One orbit of HST time will be devoted to imaging the novalike variable inSagittarius discovered by Sakurai, believed to be a planetary-nebula nucleusundergoing a final helium shell flash. Broad-band V,I and narrow-band [O III]images will be obtained. These initial observations will allow us to followthe evolution of this object, and in future years, HST observers will subtractthese baseline images from their images, in order to detect expanding ejectaand light echoes.

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