TRIMOR - three-dimensional correlation technique to analyse multi-order spectra of triple stellar systems: application to HD188753

Details TRIMOR - three-dimensional correlation technique to analyse multi-order spectra of triple stellar systems: application to HD188753 TRIMOR - three-dimensional correlation technique to analyse multi-order spectra of triple stellar systems: application to HD188753

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009mnras.399..906m&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 399, Issue 2, pp. 906-913.

Astronomy and Astrophysics

Astronomy

4

Methods: Data Analysis, Techniques: Radial Velocities, Binaries: Spectroscopic, Star: Individual: Hd188753

Scientific paper

This paper presents a new algorithm, TRIMOR, to analyse multi-order spectra of triple systems. The algorithm is an extension of TRICOR, the three-dimensional correlation technique that derives the radial velocities of triple stellar systems from single-order spectra. The combined correlation derived from many orders enables the detection and the measurement of radial velocities of faint tertiary companions. The paper applied TRIMOR to the already available spectra of HD188753, a well-known triple system, yielding the radial velocities of the faintest star in the system. This rendered the close pair of the triple system a double-lined spectroscopic binary, which led to a precise mass ratio and an estimate of its inclination. The close-pair inclination is very close to the inclination of the wide orbit, consistent with the assertion that this triple system has a close to coplanar configuration.

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