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High-Amplitude, Long-Term X-Ray Variability In The Solar-Type Star Hd 81809: The Beginning Of An X-Ray Activity Cycle?

ASTRONOMY & ASTROPHYSICS, no. 1 (2004): L13-L16

Cited: 54|Views37
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We present the initial results from our XMM-Newton program aimed at searching for X-ray activity cycles in solar-type stars. HD 81809 is a G2-type star (somewhat more evolved than the Sun, and with a less massive companion) with a pronounced 8.2 yr chromospheric cycle, as evident from from the Mt. Wilson program data. We present here the ...More

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