Probing The Cosmographic Parameters To Distinguish Between Dark Energy And Modified Gravity Models

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dc.contributor.utaustinauthorWang, F. Y.en_US
dc.creatorWang, F. Y.en_US
dc.creatorDai, Z. G.en_US
dc.creatorQi, S.en_US
dc.date.accessioned2016-04-22T19:45:24Z
dc.date.available2016-04-22T19:45:24Z
dc.date.issued2009-11en
dc.description.abstractAims. In this paper we investigate the deceleration, jerk and snap parameters to distinguish between the dark energy and modified gravity models using high redshift gamma-ray bursts (GRBs) and supernovae (SNe). Methods. We first derive the expressions of deceleration, jerk and snap parameters in dark energy and modified gravity models. In order to constrain the cosmographic parameters, we calibrate the GRB luminosity relations without assuming any cosmological models using SNe Ia. Then we constrain the model parameters (including dark energy and modified gravity models) using type Ia supernovae and gamma-ray bursts. Finally we calculate the cosmographic parameters. GRBs can extend the redshift-distance relation up to high redshifts, because they can be detected to high redshifts. Results. We find that the statefinder pair (r,s) could not be used to distinguish between some dark energy and modified gravity models, but these models could be differentiated by the snap parameter. Using the model-independent constraints on cosmographic parameters, we conclude that the Lambda CDM model is consistent with current data.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipNational Natural Science Foundation of China 10233010, 10221001, 10873009en_US
dc.description.sponsorshipNational Basic Research Program of China ( 973 program) 2007CB815404en_US
dc.description.sponsorshipJiangsu Project Innovation for Ph. D. Candidates CX07B-039zen_US
dc.identifierdoi:10.15781/T2HV23
dc.identifier.citationWang, F. Y., Z. G. Dai, and Shi Qi. >Probing the cosmographic parameters to distinguish between dark energy and modified gravity models.> Astronomy & Astrophysics, Vol. 507, No. 1 (Nov., 2009): pp. 53-59.en_US
dc.identifier.doi10.1051/0004-6361/200911998en_US
dc.identifier.issn0004-6361en_US
dc.identifier.urihttp://hdl.handle.net/2152/34389
dc.language.isoEnglishen_US
dc.relation.ispartofserialAstronomy & Astrophysicsen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.subjectgamma rays: burstsen_US
dc.subjectcosmology: cosmological parametersen_US
dc.subjectcosmology:en_US
dc.subjectdistance scaleen_US
dc.subjectgamma-ray burstsen_US
dc.subjecthubble-space-telescopeen_US
dc.subjectequation-of-stateen_US
dc.subjectrelaxeden_US
dc.subjectgalaxy clustersen_US
dc.subjectchaplygin-gas modelen_US
dc.subjectcosmological constanten_US
dc.subjectwmapen_US
dc.subjectobservationsen_US
dc.subjectfuture supernovaen_US
dc.subjectia supernovaeen_US
dc.subjectf(r) gravityen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleProbing The Cosmographic Parameters To Distinguish Between Dark Energy And Modified Gravity Modelsen_US
dc.typeArticleen_US

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