Chromospheric Activity and Orbital Solution of Six New Late-type Spectroscopic Binary Systems

Details Chromospheric Activity and Orbital Solution of Six New Late-type Spectroscopic Binary Systems Chromospheric Activity and Orbital Solution of Six New Late-type Spectroscopic Binary Systems

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ap%26ss.304...59g&link_type=abstract

Astrophysics and Space Science, Volume 304, Issue 1-4, pp. 59-61

Astronomy and Astrophysics

Astrophysics

8

Binary, Cromospheric Activity, Orbital Solution

Scientific paper

We present here the results of our high resolution echelle spectroscopic observations of six recently identified spectroscopic binary systems with late-type stellar components (HD 82159 (BD + 11 2052 A); HIP 63322 (BD + 39 2587); HD 160934 (RE J1738 + 611); HD 89959 (BD + 41 2078); HD 143705 (BD + 29 2752); HD 138157 (OX Ser)). The orbital solution has been obtained using precise radial velocities determined by cross-correlation with radial velocity standard stars as well as previous values reported by other authors. These multiwavelength optical observations allow us to study the chromosphere of these active binary systems using the information provided by several optical spectroscopic features (from Ca II H & K to Ca II IRT lines) that are formed at different heights in the chromosphere. The chromospheric contribution in these lines has been determined using the spectral subtraction technique. In addition, we have determined rotational velocities (vsin i), lithium (Li I λ 6707.8 Å) abundance, and kinematic properties (membership in representative young disk stellar kinematic groups).

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