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Fernández Figueroa, María José ; Montesinos, B. ; Castro Rubio, Elisa de ; Rego Fernández, Manuel ; Giménez, A. ; Reglero, V. | EDP Sciencies | 1986-11We report here new Ca II H and K emission line fluxes and equivalent widths for seven RSCVn binary systems, observed at several orbital phases. All the stars show enhanced chromospheric activity. With information from available spectra, an in d[...]texto impreso
Martínez Arnáiz, R. ; Maldonado, J. ; Montes Gutiérrez, David ; Eiroa, C. ; Montesinos, B. | EDP Sciencies | 2010-09Context. Chromospheric activity produces both photometric and spectroscopic variations that can be mistaken as planets. Large spots crossing the stellar disc can produce planet-like periodic variations in the light curve of a star. These spots c[...]texto impreso
In this work we try to establish a connection between the dynamo effect, which operates in the convection zone of late-type stars, and the chromospheric activity observed in these objects. We estímate in a theoretical way, for a sample of main-s[...]texto impreso
In this work we analyse the behaviour of 22 members of the RS CVn family whose absolute parameters are known by observation. We have carried out a study in comparison with detached and normal-evolution systems in order to obtain some general pro[...]texto impreso
Martínez Arnáiz, R. M. ; Maldonado, J. ; Montes Gutiérrez, David ; Eiroa, C. ; Montesinos, B. ; Ribas, I. ; Solano, E. | American Institute of Physics | 2009We present the most recent results of our ongoing long-term high resolution spectroscopic study of nearby (d ? 25 pc) FGK stars which aim is to characterize the local properties of the Galaxy, in particular the star-formation history. A through [...]texto impreso
Maldonado, J. ; Martínez Arnáiz, R. M. ; Eiroa, C. ; Montes Gutiérrez, David ; Montesinos, B. | EDP Sciencies | 2010-10Context. Nearby late-type stars are excellent targets for seeking young objects in stellar associations and moving groups. The origin of these structures is still misunderstood, and lists of moving group members often change with time and also f[...]texto impreso
Barrado y Navascués, D. ; Fernández Figueroa, María José ; Montesinos, B. ; Castro Rubio, Elisa de | EDP Sciencies | 1994-10In this paper we present a study of the evolutionary status of a sample of chromospherically active binary systems for which accurate determinations of their stellar parameters are available. Stellar ages have been obtained by using evolutionary[...]
