Person:
Fernández Figueroa, María José

Loading...
Profile Picture
First Name
María José
Last Name
Fernández Figueroa
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Físicas
Department
Area
Astronomía y Astrofísica
Identifiers
UCM identifierDialnet ID

Search Results

Now showing 1 - 3 of 3
  • Publication
    The triple system HD 165590: a spectroscopic and photometric study
    (EDP Sciences, 1991-06) Reglero, V.; Fernández Figueroa, María José; Giménez, A.; Castro Rubio, Elisa de; Fabregat, J.; Cornide Castro-Piñeiro, Manuel; Armentia, J. E.
    A detailed study of the system V772 Her = HD 165590 = ADS 11060 AB is presented. The three identified components are found to be late type stars close to the zero-age main sequence with high rotational velocities. Spectroscopic observations allowed a quantitative determination of stellar activity indicators for the two members of the close binary as well as for the visual companion. An estimation of the most relevant physical parameters has been derived from the colour indices of each of the components and the close system has been found to be an eclipsing binary. This additional source of information combined with published measures of radial velocities, provides the absolute dimensions of the component stars (1.1 and 0.6 solar masses, and 0.9 and 0.6 solar radii) which confirm that the system is very little evolved. Moreover, a distance of 32 +/- 4 parsecs has been found to V772 Her in good agreement with available trigonometric determinations. Finally, we have compared these results with evolutionary models for main sequence stars of solar chemical composition.
  • Publication
    A uvbyß survey of northern-hemisphere active binaries .2. The m_1 deficiency
    (EDP Sciencies, 1991-08) Giménez, A.; Reglero, V.; Castro Rubio, Elisa de; Fernández Figueroa, María José
    New photometric observations, using the uvby and Hß systems of 72 northern-hemisphere active binaries are discussed in order to explain the main characteristics of their spectral light intensity distribution. Values of the parameter δm_1 range from 0.0 to 0.3 mag, which cannot be explained in terms of metal underabundance alone. The existence of some mechanism, responsible for such a colour-index anomaly, is thus suggested and is found to be in close relation with the involved degree of solar-type activity.
  • Publication
    A uvbyβ survey of northern-hemisphere active binaries II: the m1 deficiency
    (EDP Sciencies, 1991-08) Giménez, A.; Reglero, V.; De Castro, E.; Fernández Figueroa, María José
    New photometric observations, using the uvby and Hβ systems of 72 northern-hemisphere active binaries are discussed in order to explain the main characteristics of their spectral light intensity distribution. Values of the parameter δm1 range from 0.0 to 0.3 mag, which cannot be explained in terms of metal underabundance alone. The existence of some mechanism, responsible for such a colour-index anomaly, is thus suggested and is found to be in close relation with the involved degree of solar-type activity.