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Absolute properties of the low-mass eclipsing binary CM Draconis
J. C. Morales, I. Ribas, C. Jordi +12
Spectroscopic and eclipsing binary systems offer the best means for determining accurate physical properties of stars, including their masses and radii. The data available for low-…
First Determination of the Distance and Fundamental Properties of an Eclipsing Binary in The Andromeda Galaxy
Ignasi Ribas, Carme Jordi, Francesc Vilardell +3
We present the first detailed spectroscopic and photometric analysis of an eclipsing binary in the Andromeda Galaxy (M31). This is a 19.3-mag semi-detached system with components o…
New membership determination and proper motions of NGC 1817. Parametric and non-parametric approach
L. Balaguer-Nunez, C. Jordi, D. Galadi-Enriquez +1
We have calculated proper motions and re-evaluated the membership probabilities of 810 stars in the area of two NGC objects, NGC 1817 and NGC 1807. We have obtained absolute proper…
The spatial distribution and luminosity function of the open cluster NGC 4815
Bing Chen, Giovanni Carraro, Jordi Torra +1
NGC 4815 is a distant and populous open cluster, which lies in the galactic plane in a region of strong absorption. As a consequence, its membership, spatial distribution and lumin…
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…