The Evolution of Population III Objects

Details The Evolution of Population III Objects The Evolution of Population III Objects

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990rmxaa..21..322d&link_type=abstract

Revista Mexicana de Astronomia y Astrofisica, 21, 322

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RESUMEN. Estudiamos el enfriamiento y colapso de las perturbaciones iso- termicas de masa M % Mj (masa de Jeans en la era de recombinaci6n) y M « Mj tomando en consideraci5n la expansi6n del Universo, presi6n, arrastre de fotones, enfriamiento de fotones (calentamiento), fotoioni- zaci6n, ionizaci5n por colisiones y la formaci6n y enfriamiento de mo- leculas de hidr6geno. Tambien estudiamos el efecto de no-esfericidad, rotaci6n y campos magneticos en el colapso de M % Mj debido a perturbaciones residuales que sobreviven para N « Mj. ABSTRACT. We study the cooling and collapse of isothermal perturbations of mass N % Nj (Jeans mass at recombination era) and N « NJ taking into account the expansion of the Universe, pressure, photon-drag, photon -cooling (heating), photoionization, collisional ionization and the formation and cooling of hydrogen molecules. We also study the effect of the nonsphericity, rotation and magnetic fields in the collapse of N % NJ. The formation of protostars from the fragmentation of clouds of mass M % MJ due to the residual perturbations that survive for N « NJ is also investigated. K ok : HYDRODYNANICS - STARS-POPULATION III

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