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Novel methods to measure the gravitational constant in space
| dc.contributor.author | Armano, M. |
| dc.contributor.author | Audley, H. |
| dc.contributor.author | Baird, J. |
| dc.contributor.author | Binetruy, P. |
| dc.contributor.author | Born, M. |
| dc.contributor.author | Bortoluzzi, D. |
| dc.contributor.author | Ramos Castro, Juan José |
| dc.contributor.other | Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica |
| dc.date.accessioned | 2020-01-14T16:27:43Z |
| dc.date.available | 2020-01-14T16:27:43Z |
| dc.date.issued | 2019-09-20 |
| dc.identifier.citation | Armano, M. [et al.]. Novel methods to measure the gravitational constant in space. "Physical review D", 20 Setembre 2019, vol. 100, núm. 6, p. 062003-1-062003-13. |
| dc.identifier.issn | 2470-0010 |
| dc.identifier.uri | http://hdl.handle.net/2117/174788 |
| dc.description.abstract | We present two novel methods, tested by LISA Pathfinder, to measure the gravitational constant G for the first time in space. Experiment 1 uses electrostatic suspension forces to measure a change in acceleration of a test mass due to a displaced source mass. Experiment 2 measures a change in relative acceleration between two test masses due to a slowly varying fuel tank mass. Experiment 1 gave a value of G=6.71±0.42(×10-11)¿¿m3¿s-2¿kg-1 and experiment 2 gave 6.15±0.35(×10-11)¿¿m3¿s-2¿kg-1, both consistent with each other to 1s and with the CODATA 2014 recommended value of 6.67408±0.00031(×10-11)¿¿m3¿s-2¿kg-1 to 2s. We outline several ideas to improve the results for a future experiment, and we suggest that a measurement in space would isolate many terrestrial issues that could be responsible for the inconsistencies between recent measurements. |
| dc.language.iso | eng |
| dc.publisher | American Physical Society (APS) |
| dc.subject | Àrees temàtiques de la UPC::Física::Astronomia i astrofísica |
| dc.subject.lcsh | Astrophysics |
| dc.subject.other | General physics |
| dc.subject.other | Gravitation |
| dc.subject.other | Cosmology and astrophysics |
| dc.subject.other | Laboratory studies of gravity |
| dc.title | Novel methods to measure the gravitational constant in space |
| dc.type | Article |
| dc.subject.lemac | Astrofísica |
| dc.identifier.doi | 10.1103/PhysRevD.100.062003 |
| dc.description.peerreviewed | Peer Reviewed |
| dc.relation.publisherversion | https://journals.aps.org/prd/abstract/10.1103/PhysRevD.100.062003 |
| dc.rights.access | Open Access |
| local.identifier.drac | 25892262 |
| dc.description.version | Postprint (published version) |
| dc.relation.projectid | info:eu-repo/grantAgreement/MINECO//ESP2013-47637-P/ES/DESARROLLO Y EXPLOTACION DE LA MISION LISA PATHFINDER Y CONTRIBUCIONES AL UNIVERSO GRAVITATORIO Y STE-QUEST/ |
| dc.relation.projectid | info:eu-repo/grantAgreement/MINECO//ESP2015-67234-P/ES/DE LISA PATHFINDER A LA MISION L3 DE ESA: HACIA LA ASTRONOMIA DE ONDAS GRAVITATORIAS DESDE EL ESPACIO/ |
| local.citation.author | Armano, M.; Audley, H.; Baird, J.; Binetruy, P.; Born, M.; Bortoluzzi, D.; Ramos, J. |
| local.citation.publicationName | Physical review D |
| local.citation.volume | 100 |
| local.citation.number | 6 |
| local.citation.startingPage | 062003-1 |
| local.citation.endingPage | 062003-13 |
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