The Pre-Main-Sequence Double-Lined Spectroscopic, Binary NTT 155913-2233

Details The Pre-Main-Sequence Double-Lined Spectroscopic, Binary NTT 155913-2233 The Pre-Main-Sequence Double-Lined Spectroscopic, Binary NTT 155913-2233

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...189.4907p&link_type=abstract

American Astronomical Society, 189th AAS Meeting, #49.07; Bulletin of the American Astronomical Society, Vol. 28, p.1338

Astronomy and Astrophysics

Astronomy

3

Scientific paper

Using high resolution, near infrared spectroscopy, we detected the cool secondary component of the visual-light spectroscopic binary in the pre-main-sequence system NTT 155913-2233. We identify approximate spectral types of K5 and M5 for the stars in the now double-lined spectroscopic binary (SB2), and K5 for the tertiary component at 0.29''. We find a mass ratio of 2.1+/-0.24 for the SB2. From the mass function determined by Mathieu (1994) we obtain lower limits for the primary and secondary masses of 1.1+/-0.2 and 0.5+/-0.1, respectively. Using fluxes from our model fit to the data, together with the spectral types and the mass ratio of the components, we are able to plot NTT 155913-2233 as a coeval system only on the Swenson et al. (1994) pre-main-sequence evolutionary tracks.

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