Eggen, Lynden-Bell, and Sandage studied the velocities of 221 dwarf stars to formulate a theory about one instance of this process.
Eggen, Lynden-Bell, and Sandage studied the velocities of 221 dwarf stars to formulate a theory about one instance of this process. The seeds for this process are the primordial overdensities reflected in the CMB fluctuations, which serve as nucleation points for this process. This process is the first step of hierarchical structure formation, and its products are cooled through a combination of Compton scattering, free-free emission, recombination, and collision-induced de-excitation. The halo masses for a given redshift for products of this process can be calculated via the Press-Schechter formalism. This process is believed to proceed via the spherical collapse model and results in the formation of the smallest objects capable of exceeding the Jeans criterion for virialization in the early universe. For 10 points, identify this process, which results in the formation of the first gravity-bound structure in the universe, objects which come in dwarf, elliptical, and spiral varieties.
Eggen, Lynden-Bell, and Sandage studied the velocities of 221 dwarf stars to formulate a theory about one instance of this process.
galaxy formation [prompt on "structure formation" before it is mentioned]