Fig. 3
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Pressure broadening γ (solid lines and dots, right ordinate) and shift δ (dashed lines and crosses, left ordinate) below 3 bar: HD-H2 for experimentally determined parameters (black, Sung et al. 2023, ≤ 1 bar) and calculated ones (green, Schaefer & Monchick 1992, for equilibrium ortho/para mixture). HD-He (theoretical) from Thibault et al. (2020, magenta), Schaefer & Monchick (1992, blue), and Stankiewicz et al. (2021, red).
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