Cálculo didáctico de la edad del Universo y la importancia de la constante cosmológica en un modelo FRW

dc.creator	Rafael Hernández Jiménez
dc.creator	Claudia Moreno
dc.creator	Daniel Sánchez Guzmán
dc.creator	Ricardo García Salcedo
dc.date	2011-09-01T00:00:00Z
dc.date.accessioned	2015-07-20T22:21:51Z
dc.date.available	2015-07-20T22:21:51Z
dc.identifier	1870-9095
dc.identifier	https://doaj.org/article/b945f60643f54936b6061b3f0951c82e
dc.identifier.uri	http://evidence.thinkportal.org/handle/123456789/20507
dc.description	Starting with the Friedmann-Robertson-Walker (FRW) cosmological model, we can find an explicit solution for the scale factor a(t) using the baryotropic equation of estat and the Friedmann equation. This barotropic equation describes several types of matter (energy): non-relativistic matter, radiation and vacuum energy (cosmological constant), therefore exists an explicit expression for a=a(t) that at the same time relates to a density of energy ρ=ρ(t) for each component. It is considered that each stage of the Universe was dominated by one type of material, and the expressions that describe the time evolution are independent each other. By using experimental data from [1] the calculations of the age of the Universe for each type of matter are carried out
dc.language	English
dc.language	Spanish
dc.language	Portuguese
dc.publisher	Instituto Politécnico Nacional, Latin American Physics Education Network
dc.relation	http://www.lajpe.org/sep11/LAJPE_556_Ricardo_Garcia_preprint_corr.pdf
dc.relation	https://doaj.org/toc/1870-9095
dc.source	Latin-American Journal of Physics Education, Vol 5, Iss 3, Pp 556-564 (2011)
dc.subject	Cosmological model FRW
dc.subject	Age of the Universe
dc.subject	Cosmological observations.
dc.subject	Special aspects of education
dc.subject	LC8-6691
dc.subject	Education
dc.subject	L
dc.subject	DOAJ:Education
dc.subject	DOAJ:Social Sciences
dc.subject	Special aspects of education
dc.subject	LC8-6691
dc.subject	Education
dc.subject	L
dc.subject	DOAJ:Education
dc.subject	DOAJ:Social Sciences
dc.subject	Special aspects of education
dc.subject	LC8-6691
dc.subject	Education
dc.subject	L
dc.subject	Special aspects of education
dc.subject	LC8-6691
dc.subject	Education
dc.subject	L
dc.subject	Special aspects of education
dc.subject	LC8-6691
dc.subject	Education
dc.subject	L
dc.title	Cálculo didáctico de la edad del Universo y la importancia de la constante cosmológica en un modelo FRW
dc.type	article