Difficulties in reconciling non-negligible differences between the local and cosmological values of the gravitational coupling in extended Brans-Dicke theories
Recent studies by Solà Peracaula, Gómez-Valent, de Cruz Pérez and Moreno-Pulido (2019,2020) have pointed out the intriguing possibility that Brans-Dicke cosmology with constant vacuum energy density (BD-ΛCDM) may be able to alleviate the H 0 and σ 8 tensions that are found in the framework of the...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
September 2021
|
| In: |
Journal of cosmology and astroparticle physics
Year: 2021, Issue: 9, Pages: 1-22 |
| ISSN: | 1475-7516 |
| DOI: | 10.1088/1475-7516/2021/09/040 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1088/1475-7516/2021/09/040
|
| Author Notes: | Adrià Gómez-Valent and Prajwal Hassan Puttasiddappa |
MARC
| LEADER | 00000caa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1778957021 | ||
| 003 | DE-627 | ||
| 005 | 20220820082414.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 211124s2021 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1088/1475-7516/2021/09/040 |2 doi | |
| 035 | |a (DE-627)1778957021 | ||
| 035 | |a (DE-599)KXP1778957021 | ||
| 035 | |a (OCoLC)1341424014 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 29 |2 sdnb | ||
| 100 | 1 | |a Gómez-Valent, Adrià |d 1990- |e VerfasserIn |0 (DE-588)1204149178 |0 (DE-627)1689290803 |4 aut | |
| 245 | 1 | 0 | |a Difficulties in reconciling non-negligible differences between the local and cosmological values of the gravitational coupling in extended Brans-Dicke theories |c Adrià Gómez-Valent and Prajwal Hassan Puttasiddappa |
| 264 | 1 | |c September 2021 | |
| 300 | |a 22 | ||
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a Computermedien |b c |2 rdamedia | ||
| 338 | |a Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Gesehen am 24.11.2021 | ||
| 520 | |a Recent studies by Solà Peracaula, Gómez-Valent, de Cruz Pérez and Moreno-Pulido (2019,2020) have pointed out the intriguing possibility that Brans-Dicke cosmology with constant vacuum energy density (BD-ΛCDM) may be able to alleviate the H 0 and σ 8 tensions that are found in the framework of the concordance cosmological model (GR-ΛCDM). The fitting analyses presented in these works indicate a preference for values of the effective gravitational coupling appearing in the Friedmann equation, G, about 4-9% larger than Newton's constant (as measured on Earth), and mildly evolving with the expansion of the universe. The signal reaches the ∼ 3.5σ c.l. when the prior on H 0 from SH0ES and the angular diameter distances to strong gravitationally lensed quasars measured by H0LICOW are considered, and the ∼ 3σ c.l. when only the former is included. Thus, the improvement in the description of the cosmological datasets relies on the existence of a mechanism capable of screening the modified gravity effects at those scales where deviations from standard General Relativity (GR) are highly constrained, as in the Solar System. In this paper we explore several extensions of BD-ΛCDM that can leave the cosmological evolution basically unaltered at the background and linear perturbations level, while being able to screen the Brans-Dicke effects inside the regions of interest, leading to standard GR. We search for weak-field solutions around spherical static massive objects with no internal pressure and show that, unfortunately, these mechanisms can only explain very tiny departures of the effective cosmological gravitational coupling from the one measured locally. This might hinder the ability of BD-ΛCDM to alleviate the cosmological tensions. | ||
| 700 | 1 | |a Hassan Puttasiddappa, Prajwal |e VerfasserIn |0 (DE-588)1246399164 |0 (DE-627)1778956742 |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Journal of cosmology and astroparticle physics |d London : IOP, 2003 |g (2021), 9, Artikel-ID 040, Seite 1-22 |h Online-Ressource |w (DE-627)361339771 |w (DE-600)2104147-7 |w (DE-576)106869809 |x 1475-7516 |7 nnas |a Difficulties in reconciling non-negligible differences between the local and cosmological values of the gravitational coupling in extended Brans-Dicke theories |
| 773 | 1 | 8 | |g year:2021 |g number:9 |g elocationid:040 |g pages:1-22 |g extent:22 |a Difficulties in reconciling non-negligible differences between the local and cosmological values of the gravitational coupling in extended Brans-Dicke theories |
| 856 | 4 | 0 | |u https://doi.org/10.1088/1475-7516/2021/09/040 |x Verlag |x Resolving-System |z lizenzpflichtig |3 Volltext |
| 951 | |a AR | ||
| 992 | |a 20211124 | ||
| 993 | |a Article | ||
| 994 | |a 2021 | ||
| 998 | |g 1246399164 |a Hassan Puttasiddappa, Prajwal |m 1246399164:Hassan Puttasiddappa, Prajwal |d 130000 |d 130001 |e 130000PH1246399164 |e 130001PH1246399164 |k 0/130000/ |k 1/130000/130001/ |p 2 |y j | ||
| 998 | |g 1204149178 |a Gómez-Valent, Adrià |m 1204149178:Gómez-Valent, Adrià |d 130000 |d 130001 |e 130000PG1204149178 |e 130001PG1204149178 |k 0/130000/ |k 1/130000/130001/ |p 1 |x j | ||
| 999 | |a KXP-PPN1778957021 |e 4005487238 | ||
| BIB | |a Y | ||
| SER | |a journal | ||
| JSO | |a {"recId":"1778957021","language":["eng"],"note":["Gesehen am 24.11.2021"],"type":{"bibl":"article-journal","media":"Online-Ressource"},"title":[{"title_sort":"Difficulties in reconciling non-negligible differences between the local and cosmological values of the gravitational coupling in extended Brans-Dicke theories","title":"Difficulties in reconciling non-negligible differences between the local and cosmological values of the gravitational coupling in extended Brans-Dicke theories"}],"person":[{"role":"aut","roleDisplay":"VerfasserIn","display":"Gómez-Valent, Adrià","given":"Adrià","family":"Gómez-Valent"},{"family":"Hassan Puttasiddappa","given":"Prajwal","display":"Hassan Puttasiddappa, Prajwal","roleDisplay":"VerfasserIn","role":"aut"}],"relHost":[{"recId":"361339771","language":["eng"],"corporate":[{"role":"isb","display":"Institute of Physics","roleDisplay":"Herausgebendes Organ"},{"role":"isb","display":"Scuola Internazionale Superiore di Studi Avanzati","roleDisplay":"Herausgebendes Organ"}],"disp":"Difficulties in reconciling non-negligible differences between the local and cosmological values of the gravitational coupling in extended Brans-Dicke theoriesJournal of cosmology and astroparticle physics","type":{"bibl":"periodical","media":"Online-Ressource"},"note":["Gesehen am 14.07.2021"],"titleAlt":[{"title":"JCAP"}],"part":{"text":"(2021), 9, Artikel-ID 040, Seite 1-22","extent":"22","year":"2021","pages":"1-22","issue":"9"},"pubHistory":["Nachgewiesen 2003 -"],"title":[{"title_sort":"Journal of cosmology and astroparticle physics","title":"Journal of cosmology and astroparticle physics","subtitle":"JCAP ; an IOP and SISSA journal"}],"physDesc":[{"extent":"Online-Ressource"}],"id":{"zdb":["2104147-7"],"eki":["361339771"],"issn":["1475-7516"]},"origin":[{"publisherPlace":"London","dateIssuedDisp":"2003-","dateIssuedKey":"2003","publisher":"IOP"}]}],"physDesc":[{"extent":"22 S."}],"id":{"doi":["10.1088/1475-7516/2021/09/040"],"eki":["1778957021"]},"origin":[{"dateIssuedKey":"2021","dateIssuedDisp":"September 2021"}],"name":{"displayForm":["Adrià Gómez-Valent and Prajwal Hassan Puttasiddappa"]}} | ||
| SRT | |a GOMEZVALENDIFFICULTI2021 | ||