Leavitt Variables in the Large Magellanic Cloud

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Scientific paper

Two low-amplitude variable supergiants in the Large Magellanic Cloud, S65-08 and S65-48 are each found to have periods of approximately 250 days. The optical data suggest that these stars are high-luminosity Cepheid variables falling more than one magnitude brighter than any other known Cepheids in the LMC. To honour the astronomer who discovered the first of these highest-luminosity Cepheids, the authors have sub-classified the variables with log P > 1.8 as being "Leavitt variables". As soon as these long-period variables are discovered in other external galaxies, reliable distances should be possible out to (m-M) ≡ 30.

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