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arxiv: astro-ph/0703450 · v1 · submitted 2007-03-16 · 🌌 astro-ph

The Sun-like activity of the solar twin 18 Scorpii

classification 🌌 astro-ph
keywords solaractivitybrightnessscorpiitwinvariationchromosphericcomplementary
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We present the results of 10 yr of complementary spectroscopic and photometric observations of the solar twin 18 Scorpii. We show that over the course of its ~7 year chromospheric activity cycle, 18 Sco's brightness varies in the same manner as the Sun's and with a likely brightness variation of 0.09%, similar to the 0.1% decadal variation in the total solar irradiance.

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    astro-ph.SR 2019-06 unverdicted novelty 2.0

    This review summarizes the development, techniques, and open questions in asteroseismology of solar-type stars whose oscillations are stochastically excited by surface convection.