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• W2116368567 abstract "We present <i>BV<i/>(<i>RI<i/>)<sub>C<sub/> and <i>JHKs<i/> photometry and low- and high-resolution spectroscopy of the 11th mag G-type star TYC 2627-638-1. Our investigation reveals that the target is separated into two young, early-G-type main-sequence (or late pre-main-sequence) stars, which are most probably bound and form a wide binary system. A substellar body orbits the brighter component as implied by radial velocity variations. The brighter component possibly also has a faint, later type stellar companion. Both components of the wide binary have clear emission cores in the Ca ii H&K lines and filled-in H<i>α<i/> absorption, indicating that both stars are chromospherically active. Our photometric time series reveals clear but only a few hundredths of a magnitude amplitude rotational modulation, which is most likely due to cool starspots. Two distinct periods, near 3.5 and 3.7 days, are found in the brightness variations. Photometry obtained separately of the two components of the wide binary show that these periodicities belong to the brighter star. The fainter component shows a much slower light variation of about 0.3 mag. amplitude. In addition, long-term changes in the brightness of both stars are seen. The spectral energy distribution show<b>s<b/> a strong near-infrared excess in the fainter component of the wide binary." @default.
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• W2116368567 date "2010-06-01" @default.
• W2116368567 modified "2023-09-25" @default.
• W2116368567 title "Young solar type active stars: the TYC 2627-638-1 system" @default.
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• W2116368567 doi "https://doi.org/10.1051/0004-6361/200912892" @default.
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