RT Journal Article
T1 Multiwavelength optical observations of two chromospherically active binary systems: v789 mon and gz leo
A1 Gálvez, M. C.
A1 Montes Gutiérrez, David
A1 Fernández Figueroa, María José
A1 Castro Rubio, Elisa De
A1 Cornide Castro-Piñeiro, Manuel
AB This paper describes a multiwavelength 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 (2RE J1101+223). The goal of the study is to determine radial velocities and fundamental stellar parameters in chromospherically active binary systems in order to include them in the activity-rotation and activity-age relations. We carried out high-resolution echelle spectroscopic observations and applied spectral-subtraction technique in order to measure emission excesses due to chromosphere. The detailed study of activity indicators allowed us to characterize the presence of different chromospheric features in these systems and enabled to include them in a larger activity-rotation survey. We computed radial velocities of the systems using cross-correlation with the radial velocity standards. The double-line spectral binarity was confirmed and the orbital solutions improved for both systems. In addition, other stellar parameters such as spectral types, projected rotational velocities (v sin i) and the equivalent width of the lithium Li i λ6707.8Å absorption line were determined.
PB IOP Publishing ltd
SN 0004-6256
YR 2009
FD 2009-04
LK https://hdl.handle.net/20.500.14352/44639
UL https://hdl.handle.net/20.500.14352/44639
LA eng
NO © 2009. The American Astronomical Society. All rights reserved. This work was supported by the Spanish "Programa Nacional de Astronomía y Astrofísica" under grants AYA2005-02750 and AYA2008-00695, and the "Comunidad de Madrid" under PRICIT project S-0505/ESP-0237 (ASTROCAM).
NO Programa Nacional de Astronomía y Astrofísica, España
NO Comunidad de Madrid
NO Ministerio de Ciencia e Innovación (MICINN), España
DS Docta Complutense
RD 4 abr 2025