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We analyse the performance of four different indicators and the chromospheric index log<jats:italic>R<\/jats:italic><jats:sup>\u2032<\/jats:sup><jats:sub>HK<\/jats:sub>in detecting RV variations induced by stellar activity in 15 slowly rotating (<jats:italic>\u03c5<\/jats:italic>sin<jats:italic>i<\/jats:italic>\u2264 5 km s<jats:sup>\u22121<\/jats:sup>), weakly active (log<jats:italic>R<\/jats:italic><jats:sup>\u2032<\/jats:sup><jats:sub>HK<\/jats:sub>\u2264 \u22124.95) solar-like stars observed with the high-resolution spectrograph High Accuracy Radial velocity Planet Searcher for the Northern hemisphere (HARPS-N).<\/jats:p><jats:p><jats:italic>Methods<\/jats:italic>. We consider indicators of the asymmetry of the cross-correlation function (CCF) between the stellar spectrum and the binary weighted line mask used to compute the RV, that is the bisector inverse span (BIS), \u0394<jats:italic>V<\/jats:italic>, and a new indicator<jats:italic>V<\/jats:italic><jats:sub>asy(mod)<\/jats:sub>together with the full width at half maximum (FWHM) of the CCF. We present methods to evaluate the uncertainties of the CCF indicators and apply a kernel regression (KR) between the RV, the time, and each of the indicators to study their capability of reproducing the RV variations induced by stellar activity.<\/jats:p><jats:p><jats:italic>Results<\/jats:italic>. The considered indicators together with the KR prove to be useful to detect activity-induced RV variations in ~47 \u00b1 18 percent of the stars over a two-year time span when a significance (two-sided p-value) threshold of one percent is adopted. In those cases, KR reduces the standard deviation of the RV time series by a factor of approximately two. The BIS, the FWHM, and the newly introduced<jats:italic>V<\/jats:italic><jats:sub>asy(mod)<\/jats:sub>are the best indicators, being useful in 27 \u00b1 13, 13 \u00b1 9, and 13 \u00b1 9 percent of the cases, respectively. The relatively limited performances of the activity indicators are related to the very low activity level and<jats:italic>\u03c5<\/jats:italic>sin<jats:italic>i<\/jats:italic>of the considered stars. For the application of our approach to sun-like stars, a spectral resolution allowing<jats:italic>\u03bb<\/jats:italic>\/\u0394<jats:italic>\u03bb<\/jats:italic>\u2265 10<jats:sup>5<\/jats:sup>and highly stabilized spectrographs are recommended.<\/jats:p>","DOI":"10.1051\/0004-6361\/201731010","type":"journal-article","created":{"date-parts":[[2018,4,21]],"date-time":"2018-04-21T18:46:31Z","timestamp":1524336391000},"page":"A155","source":"Crossref","is-referenced-by-count":27,"title":["The GAPS Programme with HARPS-N at TNG"],"prefix":"10.1051","volume":"616","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5928-7251","authenticated-orcid":false,"given":"A. 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