Astrophysical tests of gravity: a screening map of the nearby universe
文献类型：期刊论文
| 作者 | Cabre, Anna1; Vikram, Vinu1; Zhao, Gong-Bo2,3 ; Jain, Bhuvnesh1; Koyama, Kazuya2
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| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
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| 出版日期 | 2012-07-01 |
| 期号 | 7 |
| 关键词 | modified gravity galaxy dynamics galaxy surveys |
| 英文摘要 | Astrophysical tests of modified gravity theories in the nearby universe have been emphasized recently by [10] and [13]. A key element of such tests is the screening mechanism whereby general relativity is restored in massive halos or high density environments like the Milky Way. In chameleon theories of gravity, including all f(R) models, field dwarf galaxies may be unscreened and therefore feel an extra force, as opposed to screened galaxies. The first step to study differences between screened and unscreened galaxies is to create a 3D screening map. We use N-body simulations to test and calibrate simple approximations to determine the level of screening in galaxy catalogs. Sources of systematic errors in the screening map due to observational inaccuracies are modeled and their contamination is estimated. We then apply our methods to create a map out to 200 Mpc in the Sloan Digital Sky Survey footprint using data from the Sloan survey and other sources. In two companion papers this map will be used to carry out new tests of gravity using distance indicators and the disks of dwarf galaxies. We also make our screening map publicly available. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000307079600021 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6075]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Univ Penn, Dept Phys & Astron, Ctr Particle Cosmol, Philadelphia, PA 19104 USA 2.Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England 3.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cabre, Anna,Vikram, Vinu,Zhao, Gong-Bo,et al. Astrophysical tests of gravity: a screening map of the nearby universe[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2012(7). |
| APA | Cabre, Anna,Vikram, Vinu,Zhao, Gong-Bo,Jain, Bhuvnesh,&Koyama, Kazuya.(2012).Astrophysical tests of gravity: a screening map of the nearby universe.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(7). |
| MLA | Cabre, Anna,et al."Astrophysical tests of gravity: a screening map of the nearby universe".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .7(2012). |
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来源：国家天文台
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