Por favor, use este identificador para citar o enlazar este ítem: http://repositorio.udec.cl/jspui/handle/11594/9123
Título : Establishing a timeline for the high-mass star formation process.
Autor : Bovino, Stefano; supervisor de grado
Sabatini, Giovanni
Palabras clave : Estrellas de Baja Masa;Estrellas;Formación;Cosmoquímica;Materia Interestelar;Estrellas de Baja Masa;Estrellas;Formación;Cosmoquímica;Materia Interestelar
Fecha de publicación : 2021
Editorial : Universidad de Concepción.
Resumen : In this Thesis we aim to answer a long-standing astrophysical problem, quantifying the timescales of the evolutionary phases characterising the high-mass star formation pro cess. Understanding the details of the formation of massive stars (i.e. M>8-10 M ) is not trivial, since these objects are rare and at a relatively large distance. They also form and evolve very quickly and almost their entire formation takes place deeply embedded in their parental clumps. During the evolution, the chemical composition of massive clump can be heavily affected by the changes in density and temperature induced by the pres ence of massive young stellar objects. Chemical tracers that show a relation between their observed abundances and the different phases of the star formation process are commonly called chemical clocks. In this Thesis, through the comparison of observations of a large sample of massive clumps in different evolutionary stages, and accurate time-dependent chemical models, we estimate the timescales of the different phases over the entire star formation process. In addition, we provide relevant information on the reliability of cru cial chemical clocks, both for the early and the late stages, confirming that the chemistry is a powerful tool to establish a timeline for the high-mass star formation process.
Descripción : Tesis para optar al grado de Doctor en Ciencias Físicas.
URI : http://repositorio.udec.cl/jspui/handle/11594/9123
Aparece en las colecciones: Física - Tesis Doctorado

Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
THESIS ESTABLISHING A TIMELINE.Image.Marked.pdf35,18 MBAdobe PDFVista previa
Visualizar/Abrir


Este ítem está sujeto a una licencia Creative Commons Licencia Creative Commons Creative Commons