The Internal Energy for Molecular Hydrogen in Gravitationally Unstable Protoplanetary Disks
The gas equation of state may be one of the critical factors for the disk instability theory of gas giant planet formation. This Letter addresses the treatment of H sub(2) in hydrodynamic simulations of gravitationally unstable disks. In our discussion, we point out possible consequences of erroneou...
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| Veröffentlicht in: | The Astrophysical journal 2007-02, Vol.656 (2), p.L89-L92 |
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| container_title | The Astrophysical journal |
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| creator | Boley, Aaron C Hartquist, Thomas W Durisen, Richard H Michael, Scott |
| description | The gas equation of state may be one of the critical factors for the disk instability theory of gas giant planet formation. This Letter addresses the treatment of H sub(2) in hydrodynamic simulations of gravitationally unstable disks. In our discussion, we point out possible consequences of erroneous specific internal energy relations, approximate specific internal energy relations with discontinuities, assumptions of constant sub(1). In addition, we consider whether the ortho/para ratio for H sub(2) in protoplanetary disks should be treated dynamically as if the species are in equilibrium. Preliminary simulations indicate that the correct treatment is particularly critical for the study of gravitational instability when T = 30-50 K. |
| doi_str_mv | 10.1086/512235 |
| format | Article |
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| subjects | Astronomy Earth, ocean, space Exact sciences and technology |
| title | The Internal Energy for Molecular Hydrogen in Gravitationally Unstable Protoplanetary Disks |
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