A Few Tens au Scale Physical and Chemical Structures Around Young Low-Mass Protostars

The book "A Few Tens at Scale: Physical and Chemical Structures Around Young Low-Mass Protostars" offers a comprehensive analysis of the kinematic and chemical structures in the disk formation regions around young, low-mass protostars. Based on observations from the Atacama Large Millimeter/submillimeter Array (ALMA), it examines the chemical evolution of molecules in interstellar gas. The author, Yoko Oya, presents detailed results from five sun-like protostars, based on a spatial resolution of a few tens of astronomical units. These findings contribute to the understanding of the physical mechanisms underlying star and planet formation. The book highlights two key results: the significant change in the chemical composition of the gas around the centrifugal barrier of the infalling, rotating envelopes, and the varying chemical composition in the disk formation regions, which depends on the properties of the parent molecular cloud. Additionally, the ALMA observations and physical models used to describe the observed gas structures are discussed in depth.