SIMBAD references

2008ApJ...685..298D - Astrophys. J., 685, 298-312 (2008/September-3)

Stellar and circumstellar properties of the Pre-Main-Sequence binary GV Tau from infrared spectroscopy.


Abstract (from CDS):

We report spatially resolved spectroscopy of both components of the low-mass pre-main-sequence binary GV Tau. High-resolution spectroscopy in the K and L bands is used to characterize the stellar properties of the binary and to explore the nature of the circumstellar environment. We find that the southern component, GV Tau S, is a radial velocity variable, possibly as a result of an unseen low-mass companion. The strong warm gaseous HCN absorption reported previously by Gibb and coworkers toward GV Tau S was not present during the epoch of our observations. Instead, we detect warm (∼500 K) molecular absorption with similar properties toward the northern infrared companion, GV Tau N. At the epoch of our observations, the absorbing gas toward GV Tau N was approximately at the radial velocity of the GV Tau molecular envelope, but it was redshifted with respect to the star by ∼13 km/s. One interpretation of our results is that GV Tau N is also a binary and that most of the warm molecular absorption arises in a circumbinary disk viewed close to edge-on.

Abstract Copyright:

Journal keyword(s): Stars: Circumstellar Matter - Infrared: Stars - Stars: Formation - Stars: Fundamental Parameters - stars: individual (GV Tau) - Stars: Late-Type - Stars: Low-Mass, Brown Dwarfs - Stars: Pre-Main-Sequence - Techniques: Radial Velocities - Techniques: Spectroscopic

Simbad objects: 8

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