An Accelerating Universe without Lambda: Delta Gravity Using Monte Carlo

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dc.contributor.authorAlfaro Solís, Jorge Luis
dc.contributor.authorSan Martín Hormazábal, Marco
dc.contributor.authorSureda Hernández, Joaquín Miguel
dc.date.accessioned2022-03-03T14:50:08Z
dc.date.available2022-03-03T14:50:08Z
dc.date.issued2019
dc.description.abstractA gravitational field model based on two symmetric tensors, gμν and g˜μν , is studied, using a Markov Chain Monte Carlo (MCMC) analysis with the most updated catalog of SN-Ia. In this model, new matter fields are added to the original matter fields, motivated by an additional symmetry ( δ˜ symmetry). We call them δ˜ matter fields. This theory predicts an accelerating Universe without the need to introduce a cosmological constant Λ by hand in the equations. We obtained a very good fit to the SN-Ia Data, and with this, we found the two free parameters of the theory called C and L2 . With these values, we have fixed all the degrees of freedom in the model. The last H0 local value measurement is in tension with the CMB Data from Planck. Based on an absolute magnitude MV=−19.23 for the SN, Delta Gravity finds H0 to be 74.47±1.63 km/(s Mpc). This value is in concordance with the last measurement of the H0 local value, 73.83±1.48 km/(s Mpc).
dc.fuente.origenORCID
dc.identifier.doi10.3390/universe5020051
dc.identifier.eissn2218-1997
dc.identifier.urihttp://www.mdpi.com/2218-1997/5/2/51
dc.identifier.urihttps://www.doi.org/10.3390/universe5020051
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/63287
dc.information.autorucInstituto de física ; Alfaro Solís, Jorge Luis ; 0000-0002-2091-1325 ; 49962
dc.information.autorucInstituto de astrofísica ; San Martín Hormazábal, Marco ; 0000-0003-2565-3174 ; 213497
dc.information.autorucInstituto de astrofísica ; Sureda Hernández, Joaquín Miguel ; 0000-0003-2348-8267 ; 213075
dc.issue.numeroNo. 2
dc.language.isoen
dc.nota.accesoContenido completo
dc.pagina.final24
dc.pagina.inicio1
dc.provenancengjara 2022-03-03 11:50:07
dc.relation.isformatofUniverse, vol. 5, no. 2 (2019), pp. 1-24.
dc.revistaUniverse
dc.rightsacceso abierto
dc.subjectAccelerated expansion
dc.subjectCosmological constant
dc.subjectCosmology
dc.subjectDark energy
dc.subjectDelta Gravity
dc.subjectModified gravity
dc.subjectPhantom energy
dc.subjectSupernovae
dc.subject.ddc520
dc.subject.deweyAstronomíaes_ES
dc.subject.otherAstronomía
dc.titleAn Accelerating Universe without Lambda: Delta Gravity Using Monte Carlo
dc.typeartículo
dc.volumenVol. 5
sipa.codpersvinculados49962
sipa.codpersvinculados213497
sipa.codpersvinculados213075
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