Abstract
We found candidate water lines to locate the \(\mathrm {H_2O}\) snowline position through future high-dispersion spectroscopic observations. As a first step, we calculated chemical structures of the disk using the self-consistent physical models of a typical T Tauri disk. We confirmed that the water gas abundance is high not only in the hot disk midplane within the \(\mathrm {H_2O}\) snowline, but also in the outer hot surface and photodesorption region. Next, we calculated the profiles of water lines, and find the lines which are best to locate the position of the \(\mathrm {H_2O}\) snowline. The lines we identified are those with high upper state energies and small Einstein A coefficients. The wavelengths of the candidate water lines range from mid-infrared to sub-millimeter, and they overlap with the wavelength coverages of ALMA and future mid-infrared high dispersion spectrographs (e.g., TMT/MICHI, SPICA). Most contents of this chapter is based on our refereed paper that has been published (Notsu et al. 2016, ApJ, 827, 113).
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Notes
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\(n_{\mathrm {H}}\) is the total gas atomic hydrogen number density.
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Notsu, S. (2020). Modeling Studies I. The Case of the T Tauri Star. In: Water Snowline in Protoplanetary Disks. Springer Theses. Springer, Singapore. https://doi.org/10.1007/978-981-15-7439-9_2
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