| What do we know about cosmography | |
Zhang MJ(张明建); Li H(李虹) ; Zhang, MJ; Li, H; Xia, JQ
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| 2017 | |
| Source Publication | EUROPEAN PHYSICAL JOURNAL C
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| ISSN | 1434-6044 |
| EISSN | 1434-6052 |
| Volume | 77Issue:7Pages:434 |
| Subtype | Article |
| Abstract | In the present paper, we investigate the cosmographic problem using the bias-variance trade-off. We find that both the z-redshift and the y = z/(1 + z)-redshift can present a small bias estimation. It means that the cosmography can describe the supernova data more accurately. Minimizing risk, it suggests that cosmography up to the second order is the best approximation. Forecasting the constraint from future measurements, we find that future supernova and redshift drift can significantly improve the constraint, thus having the potential to solve the cosmographic problem. We also exploit the values of cosmography on the deceleration parameter and equation of state of dark energy w(z). We find that supernova cosmography cannot give stable estimations on them. However, much useful information was obtained, such as that the cosmography favors a complicated dark energy with varying w( z), and the derivative dw/dz < 0 for low redshift. The cosmography is helpful to model the dark energy. |
| DOI | 10.1140/epjc/s10052-017-5005-4 |
| WOS Keyword | DARK-ENERGY CONSTRAINTS ; EQUATION-OF-STATE ; COSMIC ACCELERATION ; LUMINOSITY DISTANCE ; SUPERNOVA ; REDSHIFT ; UNIVERSE ; DECELERATION ; STATEFINDER ; COSMOLOGY |
| Indexed By | SCI ; SCOPUS ; ADS ; INSPIREHEP |
| Language | 英语 |
| WOS Research Area | Physics |
| WOS Subject | Physics, Particles & Fields |
| WOS ID | WOS:000404488400003 |
| ADS Bibcode | 2017EPJC...77..434Z |
| ADS URL | https://ui.adsabs.harvard.edu/abs/2017EPJC...77..434Z |
| ADS CITATIONS | https://ui.adsabs.harvard.edu/abs/2017EPJC...77..434Z/citations |
| AXRIV CODE | 161 |
| inspireid | 1414583 |
| inspireURL | https://inspirehep.net/record/1414583 |
| Citation statistics |
Cited Times:29 [ADS]
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| Document Type | 期刊论文 |
| Identifier | http://ir.ihep.ac.cn/handle/311005/285479 |
| Collection | 粒子天体物理中心 |
| Affiliation | 中国科学院高能物理研究所 |
| First Author Affilication | Institute of High Energy |
| Recommended Citation GB/T 7714 | Zhang MJ,Li H,Zhang, MJ,et al. What do we know about cosmography[J]. EUROPEAN PHYSICAL JOURNAL C,2017,77(7):434. |
| APA | 张明建,李虹,Zhang, MJ,Li, H,&Xia, JQ.(2017).What do we know about cosmography.EUROPEAN PHYSICAL JOURNAL C,77(7),434. |
| MLA | 张明建,et al."What do we know about cosmography".EUROPEAN PHYSICAL JOURNAL C 77.7(2017):434. |
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