Английская Википедия:Henize 70

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Henize 70 (N70) is a faint emission nebula and superbubble located in the Large Magellanic Cloud. It is located in the constellation of Dorado.

Observation history

Henize 70 was first observed in 1950 in a survey of bright planetary nebulae, based on appearance it was proposed that it might be a supernova remnant. In 1956, it was added to a catalogue of Hα emission stars and nebulae by Karl Gordon Henize, where it was described as an emission nebula instead of a planetary nebula.

Origins

Файл:Superbubble N70 in LMC.jpg

ESO image of Henize 70

In a paper published in 1978, it was proposed that stellar winds could be a major part of the formation of Henize 70 and other emission nebulae. Later, in a scientific article 1981 it was mentioned that it was more likely from a supernova explosion rather than stellar winds. Another study in 2014 measured high S_II and Hα ratios, indicating that it is not a supernova remnant.

Henize 70 has spectral line ratios relatively similar to that of supernova remnants due to having similar S_II/Hα line ratios although most supernova remnants have higher N_II/Hα line ratios.