The Sun-like activity of the solar twin 18 Scorpii

The Sun-like activity of the solar twin 18 Scorpii

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 variat...

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Veröffentlicht in:arXiv.org 2007-03
Hauptverfasser: Hall, Jeffrey C, Henry, Gregory W, Lockwood, G Wesley
Format: Artikel
Sprache:eng
Schlagworte:
Brightness
Irradiance
Photometry
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Zusammenfassung: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.
ISSN:2331-8422
DOI:10.48550/arxiv.0703450