Fig. 1
Heat capacity for molecular hydrogen using different ortho:para ratios (see legend for details). θrot = 85.32 K and θvib = 5984.48 K are the rotational and vibrational excitation temperatures, respectively. The black dashed curve represents the raw model from Black & Bodenheimer (1975), and the black solid curve is the modified Black & Bodenheimer (1975) formula (see text).
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