AAS Journal Author Series: Griselda Arroyo-Chávez on 2026ApJ..1002..137A

Griselda Arroyo-Chávez (University of Arizona; Instituto de Radioastronomía y Astrofísica) chats about her article on the effects of turbulence, gravity, and the magnetic field in shaping the observed scaling of the specific angular momentum (j) with radius (R) as j ∼ R^(3/2) in molecular structures on scales of ∼0.1−50 pc. By progressively adding these three ingredients and measuring the clump size and specific angular momentum in three smoothed particle hydrodynamics simulations of the formation of giant molecular clouds, they find that the nonmagnetic runs produce elongated clumps that deviate the most from the j–R relation, which is best reproduced by the gravity+turbulence runs. In the purely hydrodynamic case, no dense elongated structures form, suggesting that turbulence alone is insufficient to generate dense filaments, although clumps have j magnitudes consistent with observations. On the Roles of Gravity, Turbulence, and the Magnetic Field in Angular Momentum Transfer within Molecular Clouds https://scixplorer.org/abs/2026ApJ..1... Griselda's web presence: https://astro.arizona.edu/person/gris... The intended audience for the AAS Journal Author Series is active researchers.