6 papers
Spiral structure parameters in the solar neighbourhood
D. Fernandez, X. Luri, F. Figueras +1
Two samples of O- and B-type stars and Cepheids with Hipparcos data have been used to characterize galactic rotation and spiral arm kinematics in the solar neighbourhood. An extens…
Kinematics of young stars (I): Local irregularities
J. Torra, D. Fernandez, F. Figueras
The local velocity field of young stars is dominated by the galactic rotation, the kinematics of the Gould Belt and the nearest OB associations and open clusters, and the kinematic…
Determination of the LMC distance modulus from the Classical Cepheid Period-Luminosity relation
Xavier Luri, J. Torra, F. Figueras +3
The distance modulus of the Large Magellanic Cloud (LMC) is the first step on the determination of the cosmic distance scale. In this paper it is obtained from a new calibration of…
Absolute magnitudes and kinematics of CP stars from Hipparcos data
A. E. Gomez, X. Luri, V. Sabas +5
The position in the HR diagram and the kinematic characteristics of different kinds of CP stars of the upper main sequence are obtained using the LM method (Luri et al., 1996). Mos…
CP stars: Photometric calibrations of luminosity using Hipparcos data
F. Figueras, X. Luri, A. E. Gomez +7
The application of the Stromgren photometric luminosity calibrations to different types of CP stars is reexamined in the light of the new Hipparcos data. A first attempt is made to…
Photometric and H observations of LSI+61303: detection of a 26 day V and JHK band modulation
J. M. Paredes, P. Marziani, J. Marti +12
We present new optical and infrared photometric observations and high resolution H spectra of the periodic radio star \lsi. The optical photometric data set covers the time inte…