Another Ceasing Cepheid

NGC 6823 is the emission nebula that surrounds NGC 6823, the cluster which plays host to the interesting Cepheid HDE 344787

Earlier this year, I wrote an article about a Cepheid variable star named V19 in M31. This Cepheid was one that once pulsated strongly and was one of the variables Hubble first used to find the distance to the Andromeda galaxy. But today, V19 is a rare instance of a Cepheid that has seemingly, stopped pulsating. Another example of this phenomenon is that of Polaris, which has decreased in the amplitude of brightnesses by nearly an order of magnitude in the past century, although some reports indicate that it may be beginning to increase again. Meanwhile, a new paper is looking to add another star, HDE 344787, to this rare category and according to the paper, it may be “even more interesting than Polaris”.

(…) Read the rest of Another Ceasing Cepheid (311 words)

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(C) jvois for Universe Today, 2011. | Permalink | 2 comments | Add to Post

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