Bibcode
Rebolo, R.; Villó, Isidro; Díaz-Sánchez, Anastasio; Pérez-Garrido, Antonio; Jódar, Esther; Pérez-Prieto, J. A.
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 429, Issue 1, p.859-867
Fecha de publicación:
2
2013
Número de citas
51
Número de citas referidas
46
Descripción
We present high-angular-resolution optical I-band imaging of 451 late K
to mid-M nearby stars. These observations have been performed with
Astralux and FastCam using the lucky imaging technique. We found 70
companions with separations between 0.1 and 3.5 arcsec, out of which 28
are new discoveries. We derive a total binary fraction of 20.3+
6.9- 5.2 per cent. Follow-up observations have been
carried out for 16 of these new binaries and all of them were confirmed
as physically associated systems. Parallaxes are available for 70 per
cent of the binary sample, providing reliable estimates of physical
separations. We have measured separations and position angles as an
initial stage for a systematic follow-up aimed to determine orbital
parameters.
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Rafael
Rebolo López