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Frasca, A. ; Montes Gutiérrez, David ; Alcalá, J.M. ; Klutsch, A. ; Guillout, P. | Copernicus Foundation Polish Astronomy | 2018The study of contemporaneous variations of the continuum flux and emission lines is of great importance to understand the different astrophysical processes at work in T Tauri stars. In this paper we present the results of a simultaneous BV RI an[...]texto impreso
Guillout, P. ; Frasca, A. ; Klutsch, A. ; Marilli, E. ; Montes Gutiérrez, David | EDP Sciencies | 2010-09Context. During the course of a large spectroscopic survey of X-ray active late-type stars in the solar neighbourhood, we discovered four lithium-rich stars packed within just a few degrees on the sky. Although located in a sky area rich in CO m[...]texto impreso
Klutsch, A. ; Frasca, A. ; Gillout, P. ; Montes Gutiérrez, David ; Pineau, F.-X. ; Grosso, N. ; Stelzer, B. | EDP Sciencies | 2020-05-13Context. Young field stars are hardly distinguishable from older ones because their space motion rapidly mixes them with the stellar population of the Galactic plane. Nevertheless, a careful target selection allows for young stars to be spotted [...]texto impreso
Fröhlich, H. E. ; Frasca, A. ; Catanzaro, G. ; Bonanno, A. ; Corsaro, E. ; Molenda-?akowicz, J. ; Klutsch, A. ; Montes Gutiérrez, David | EDP Sciencies | 2012-07Aims. We present a detailed study of the two Sun-like stars KIC?7985370 and KIC?7765135, to determine their activity level, spot distribution, and differential rotation. Both stars were previously discovered by us to be young stars and were obse[...]texto impreso
Montes Gutiérrez, David ; López Santiago, J. ; Martínez Arnáiz, R. M. ; Guillout, P. ; Klutsch, A. ; Freire Ferrero, R. ; Frasca, A. ; Marilli, E. | American Institute of Physics | 2009Post T Tauri stars (PTTS) are late-type stars in the age range between 10 and 100 Myr filling the gap between T Tauri (TTs) and zero-age: main sequence phases. This period of evolution remains ambiguous and until now different studies of young s[...]texto impreso
Klutsch, Alexis ; Freire Ferreros, R. ; Guillout, P. ; Frasca, A. ; Marilli, E. ; Montes Gutiérrez, David | EDP Sciences | 2014-07Context. Over the last century, the overdensities in the velocity distributions of nearby stars were attributed to stellar kinematic groups or moving groups. Although their reality was initially questioned, their existence is now supported by a [...]texto impreso
Frasca, A. ; Guillout, P. ; Klutsch, A. ; Freire Ferrero, R. ; Marilli, E. ; Biazzo, K. ; Gandolfi, D. ; Montes Gutiérrez, David | EDP Sciences | 2018-05-04Context. Star formation in the solar neighborhood is mainly traced by young stars in open clusters, associations, and in the field, which can be identified, for example, by their X-ray emission. The determination of stellar parameters for the op[...]texto impreso
?enavc?, H. V. ; Bahar, E. ; Montes Gutiérrez, David ; Zola, S. ; Hussain, G. A. J. ; Frasca, A. ; I??k, E. ; Yörüko?lu, O. | Oxford Univ Press | 2018-09Using a time series of high-resolution spectra and high-quality multicolour photometry, we reconstruct surface maps of the primary component of the RS CVn type rapidly rotating eclipsing binary, SV Cam (F9V + K4V). We measure a mass ratio, q, of[...]
