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2018MNRAS.475.2253A - Mon. Not. R. Astron. Soc., 475, 2253-2268 (2018/April-1)

A survey of TiOλ567 nm absorption in solar-type stars.


Abstract (from CDS):

Molecular absorption bands are estimators of stellar activity and spot cycles on magnetically active stars. We have previously introduced a new colour index that compares absorption strength of the titanium oxide (TiO) at 567 nm with nearby continuum. In this paper, we implement this index to measure long-term activity variations and the statistical properties of the index in a sample of 302 solar-type stars from the High Accuracy Radial Velocity Planet search Spectrograph planet search programme. The results indicate a pattern of change in star's activity, covers a range of periods from 2 yr up to 17 yr.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): techniques: spectroscopic: visual band - stars: activity cycles - stars: solar-type

Simbad objects: 303

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