Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.6215d&link_type=abstract
American Astronomical Society, AAS Meeting #211, #62.15; Bulletin of the American Astronomical Society, Vol. 39, p.850
Astronomy and Astrophysics
Astronomy
Scientific paper
We present spatially resolved infrared spectroscopy of both components in the low-mass pre-main-sequence binary GV Tau. High resolution (R=25,000) K and L-band spectroscopy at high signal-to-noise (S/N >100) is used to characterize the stellar properties of the binary and explore the circumstellar environment. Radial velocity variations in the South component over three epochs suggest that it may be a short period spectroscopic binary (SB1) with an unseen low-mass companion. By fitting the resolved photospheric absorption lines to synthetic spectral templates, we measure the effective temperature, surface gravity and vsin i rotational velocity in the South component, and set constraints on these stellar properties in the North. In addition, radial velocities of both stellar components are measured. We observe warm (T=550 K) gaseous HCN absorption in the North that is redshifted 15 km/s with respect to the star. Similar molecular absorption is absent in the southern component, in contrast to the results of the earlier study of Gibb et al. (2007).
Carr Joe
Doppmann Greg
Najita Joan
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