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Molecular hydrogen emission from protoplanetary disks: UV and X-ray irradiated disk model with dust evolution

  • T. Montmerle, D. Ehrenreich, A.-M. Lagrange, H. Nomura (a1), Y. Aikawa (a2), M. Tsujimoto (a3), Y. Nakagawa (a2) and T. J. Millar (a1)...

Abstract

We have modelled a detailed physical structure of protoplanetary disks, taking into account X-ray and UV irradiation from a central star, as well as dust size growth and settling towards the disk midplane. In addition, we have calculated the level populations and line emission of molecular hydrogen in the disks. As a result, we reproduce the observed strong H2 line flux if the disks are influenced by strong UV and X-ray irradiation. Also, the dust evolution changes the physical properties of the disk, and thus the H2 line ratios.


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[1] Nomura, H., Aikawa, Y., Tsujimoto, M., Nakagawa, Y., & Millar, T.J., 2007, ApJ, 661, 334
[2] Nomura, H., & Millar, T.J., 2005, A&A, 438, 923

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