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Predicción probabilística de la existencia de estrellas Cefeidas en la galaxia
Author(s) -
Alfonso Hernandez,
Domínguez Cárdenas,
Eloy Cruz,
Anderson Flores,
L. E. Garduño Puga,
Itzel Hernandez-Armenta,
Jacqueline Rasgado Blas,
Jurado Jiménez,
N. A. Nava-Moreno,
Fuentes López,
R. R. Santos-Castillo,
A. Torres-Muñoz,
P. Velasco,
A. Torres Campos,
Manuel Gerardo Corona Galindo
Publication year - 2019
Publication title -
revista mexicana de física e
Language(s) - Spanish
Resource type - Journals
SCImago Journal Rank - 0.178
H-Index - 10
eISSN - 2683-2216
pISSN - 1870-3542
DOI - 10.31349/revmexfise.65.34
Subject(s) - humanities , physics , philosophy
Las estrellas Cefeidas han sido de gran relevancia para la determinacion de distancias tanto en la Galaxia como a escala cosmologica. Debido a que, hasta el momento, la mayor parte de las Cefeidas cercanas observadas se encuentran en la vecindad solar, se juzga pertinente un estudio probabilistico sobre su distribucion, no solo en la vecindad solar sino tambien en toda la Via Lactea, pues deben estar jugando un papel importante para mantener la estructura de nuestra Galaxia. Partiendo de 187 Cefeidas observadas en la Via Lactea, se presenta una funcion de densidad de probabilidad normal que sirvio para elaborar un modelo en tres dimensiones que permite encontrar la zona de mas alta concentracion de Cefeidas y de paso, con ella, predecir la existencia de Cefeidas en zonas ceranas a toda la Galaxia. Asmismo, se da a conocer una segunda distribucion de probabilidad, normal tambien, pero en la vecindad del eje galactico, a fin de elaborar otro modelo que permita predecir la existencia de estrellas Cefeidas dentro de la Via Lactea y en la vecindad del sol. ABSTRACT The Cepheid stars have been very relevant for the determination of distances both in the Galaxy and also at cosmological scale. Because, so far, most of the nearby observed Cepheids are in the solar neighborhood, a probabilistic study about their distribution in the solar neighborhood and in the whole Milky Way is pertinent, since they must be playing an important role for keeping the structure of our Galaxy. Starting from the in the Milky Way already 187 observed Cepheids, a normal probability density function for their distribution in the Galaxy is presented, which is used to carry out a model which allows to find the high concentration zone of Cepheids and, in turn, with it, to predict the existence of Cepheids in the neighborhood of the Galaxy. A second model has been done, in order to prognosticate the existence of Cepheids within the milky way and in the neigborhood of the sun.

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