New Observations of Molecular Absorptions toward GV Tau N

Details New Observations of Molecular Absorptions toward GV Tau N New Observations of Molecular Absorptions toward GV Tau N

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..280p.175g&link_type=abstract

The Molecular Universe, Posters from the proceedings of the 280th Symposium of the International Astronomical Union held in Tole

Astronomy and Astrophysics

Astronomy

Scientific paper

We present high-resolution (Δλ/λ˜25,000), near-infrared spectroscopic L-band observations toward T Tauri star GV Tau N. The data were acquired with the NIRSPEC instrument on the Keck II telescope, located on Mauna Kea, HI. We detected strong absorption due to HCN ν_3 that we interpret to be located in the warm molecular layer of a nearly edge-on protoplanetary disk. Our spectra differ significantly from data acquired in 2006 and reported in Gibb et al. (2007). Specifically, the stellar photospheric lines are weaker relative to the continuum, possibly due to increased veiling. Also, we sampled a greater wavelength range than in 2006, surveying nearly the complete L band, and detected lines out to a much higher J, indicating warmer gas than previously reported. We discuss similarities and differences in spectra acquired in 2006 and 2009 and implications for the material in the disk of GV Tau N, including rotational temperatures, abundances, and inferred location.

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