Publications (17)
Multiwavelength optical observations of chromospherically active binary systems V. FF UMa (2RE J0933+624): a system with orbital period variation
M. C. Gálvez, D. Montes, M. J. Fernández-Figueroa +2
This is the fifth paper in a series aimed at studying the chromospheres of active binary systems using several optical spectroscopic indicators to obtain or improve orbital solutio…
Late-type stars members of young stellar kinematic groups - I. Single stars
D. Montes, J. Lopez-Santiago, M. C. Galvez +3
This is the first paper of a series aimed at studying the properties of late-type stars members of young stellar kinematic groups. We concentrate our study on classical young movin…
The Age-Mass Relation for Chromospherically Active Binaries. II. Lithium Depletion in Dwarf Components
D. Barrado y Navascues, M. J. Fernandez-Figueroa, R. J. Garcia Lopez +2
We present an extensive study of lithium abundances in dwarf components of chromospherically active binary stars (CABS). Since most of these binaries have known radii, masses and a…
Chromospherically active binaries members of young stellar kinematic groups
D. Montes, M. J. Fernandez-Figueroa, E. De Castro +2
We present a kinematic study of a large sample of chromospherically active binaries (CAB) in order to determine their membership to representative young disk stellar kinematic grou…
Library of high and mid-resolution spectra in the CaII H & K, H{alpha}, H{beta}, NaI D{1}, D{2}, and HeI D{3} line regions of F, G, K and M field stars
D. Montes, E. L. Martin, M. J. Fernandez-Figueroa +2
In this work we present spectroscopic observations centered in the spectral lines most widely used as optical indicators of chromospheric activity (H{alpha}, H{beta}, Ca II H & K,…
Analysis of combined radial velocities and activity of BD+20 1790: evidence supporting the existence of a planetary companion
M. Hernán-Obispo, M. Tuomi, M. C. Gálvez-Ortiz +17
This paper presents the simultaneous Bayesian analysis of the radial velocity and activity indices for the K5Ve active star BD+20 1790, that was proposed to host a close-in massive…
Multiwavelength optical observations of chromospherically active binary systems. IV. The X-ray/EUV selected binary BK Psc (2RE J0039+103)
M. C. Galvez, D. Montes, M. J. Fernandez-Figueroa +3
We present high resolution echelle spectra taken during four observing runs from 1999 to 2001 of the recently X-ray/EUV selected chromospherically active binary BK Psc (2RE J0039+1…
Multiwavelength optical observations of the chromospherically active binary system MS Ser
J. Sanz-Forcada, D. Montes, M. J. Fernandez-Figueroa +2
We present here a continuation of our ongoing project of multiwavelength optical observations aimed at studying the chromosphere of active binary systems using the information prov…
Finding the most variable stars in the Orion Belt with the All Sky Automated Survey
Jose A. Caballero, M. Cornide, E. de Castro
We look for high-amplitude variable young stars in the open clusters and associations of the Orion Belt. We use public data from the ASAS-3 Photometric V-band Catalogue of the All…
X-ray variability of sigma Orionis young stars with ROSAT
J. A. Caballero, J. Lopez-Santiago, E. de Castro +1
We used the Aladin Virtual Obsrvatory tool and High Resolution Imager ROSAT archival data to search for X-ray variability in scale of days in 23 young stars in the sigma Orionis cl…
Application of the spectral subtraction technique to the CaII H & K and H lines in a sample of chromospherically active binaries
D. Montes, E. De Castro, M. J. Fernandez-Figueroa +1
We present new spectroscopic observations in the Ca~{\sc ii} H \& K line region for a sample of 28 chromospherically active binary systems (RSCVn and BYDra classes), with dif…
The behaviour of the excess CaII H & K and H_epsilon emissions in chromospherically active binaries
D. Montes, M. J. Fernandez-Figueroa, M. Cornide +1
In this work we analyze the behaviour of the excess Ca~{\sc ii} H \& K and H emissions in a sample of 73 chromospherically active binary systems (RSCVn and BYDra classes)…
A high-resolution spectroscopic survey of late-type stars: chromospheric activity, rotation, kinematics, and age
J. Lopez-Santiago, D. Montes, M. C. Galvez-Ortiz +5
Aims: We present a compilation of spectroscopic data from a survey of 144 chromospherically active young stars in the solar neighborhood which may be used to investigate different…
Evidence of a massive planet candidate orbiting the young active K5V star BD+20 1790
M. Hernán-Obispo, M. C. Gálvez-Ortiz, G. Anglada-Escudé +4
BD+20 1790 is a young active, metal-rich, late-type K5Ve star. We have undertaken a study of stellar activity and kinematics for this star over the past few years. Previous results…
The age-mass relation for chromospherically active binaries: III. Lithium depletion in giant components
D. Barrado y Navascues, E. De Castro, M. J. Fernandez-Figueroa +2
We present a study of the lithium abundances of a sample of evolved components of Chromospherically Active Binary Systems. We show that a significant part of them have lithium exce…
Multiwavelength optical observations of chromospherically active binary systems. III. High resolution echelle spectra from Ca II H&K to Ca II IRT
D. Montes, M. J. Fernandez-Figueroa, E. De Castro +3
This is the third paper of a series aimed at studying the chromosphere of active binary systems using the information provided for several optical spectroscopic features. High reso…
Multiwavelength optical observations of two chromospherically active binary systems: V789 Mon and GZ Leo
M. C. Gálvez, D. Montes, M. J. Fernández-Figueroa +2
This paper describes a multiwavelengh optical study of chromospheres in two X-ray/EUV selected active binary stars with strong H_alpha emission, V789 Mon (2RE J0725-002) and GZ Leo…