Snapshot of the FIRE-2 merger at a time of 2.87 Gyr with viewing angles of “v1,” which is roughly perpendicular (with an angle of 109°) to the “v0” angle. (Upper) σ _v vs. Σ_mol distribution of GMCs. (Lower) Σ_mol map of the snapshot. We can see that viewing from different angles still gives us high-σ _v measurements, which also suggests that the σ _v we measure is not the velocity dispersion among GMCs along the line of sight. The Σ_mol and σ _v for this snapshot are shown from the “v1” angle.