Model-independent test of the cosmic anisotropy with inverse distance ladder
Abstract If the Universe is endowed with cosmic anisotropy, it will have a preferred direction of expansion. By reconstructing the expansion history using a Gaussian process (GP), researchers can probe the cosmic anisotropy model-independently. In this paper, for the luminosity distance $$d_L(z)$$ d...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-03-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-13994-5 |
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| author | Zong-Fan Yang Da-Wei Yao M. Le Delliou Ke Wang |
| author_facet | Zong-Fan Yang Da-Wei Yao M. Le Delliou Ke Wang |
| author_sort | Zong-Fan Yang |
| collection | DOAJ |
| description | Abstract If the Universe is endowed with cosmic anisotropy, it will have a preferred direction of expansion. By reconstructing the expansion history using a Gaussian process (GP), researchers can probe the cosmic anisotropy model-independently. In this paper, for the luminosity distance $$d_L(z)$$ d L ( z ) reconstruction, we turn to the inverse distance ladder, where type Ia supernovae (SNIa) from the Pantheon+ sample determine relative distances, and strongly gravitationally lensed quasars from the H0LiCOW sample anchor these relative distances with some absolute distance measurements. By isolating the anisotropic information that could be carried by the Hubble constant $$H_0$$ H 0 and obtaining constraints on the intrinsic parameter of SNIa, the absolute magnitude $$M=-19.2522^{+0.0594}_{-0.0649}$$ M = - 19 . 2522 - 0.0649 + 0.0594 (at $$68\%$$ 68 % CL), we find that $$d_L(z)$$ d L ( z ) reconstructions from samples located in different regions of the galactic coordinate system are almost consistent with each other, while only a very weak preference for the cosmic anisotropy is found. |
| format | Article |
| id | doaj-art-1f890cc9a5764cd3a6b50d770bb3b10d |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-1f890cc9a5764cd3a6b50d770bb3b10d2025-08-20T03:40:50ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-03-0185311110.1140/epjc/s10052-025-13994-5Model-independent test of the cosmic anisotropy with inverse distance ladderZong-Fan Yang0Da-Wei Yao1M. Le Delliou2Ke Wang3School of Physical Science and Technology, Lanzhou UniversityBeijing Zhihuo Technology Co., LtdSchool of Physical Science and Technology, Lanzhou UniversityDepartment of Physics, Liaoning Normal UniversityAbstract If the Universe is endowed with cosmic anisotropy, it will have a preferred direction of expansion. By reconstructing the expansion history using a Gaussian process (GP), researchers can probe the cosmic anisotropy model-independently. In this paper, for the luminosity distance $$d_L(z)$$ d L ( z ) reconstruction, we turn to the inverse distance ladder, where type Ia supernovae (SNIa) from the Pantheon+ sample determine relative distances, and strongly gravitationally lensed quasars from the H0LiCOW sample anchor these relative distances with some absolute distance measurements. By isolating the anisotropic information that could be carried by the Hubble constant $$H_0$$ H 0 and obtaining constraints on the intrinsic parameter of SNIa, the absolute magnitude $$M=-19.2522^{+0.0594}_{-0.0649}$$ M = - 19 . 2522 - 0.0649 + 0.0594 (at $$68\%$$ 68 % CL), we find that $$d_L(z)$$ d L ( z ) reconstructions from samples located in different regions of the galactic coordinate system are almost consistent with each other, while only a very weak preference for the cosmic anisotropy is found.https://doi.org/10.1140/epjc/s10052-025-13994-5 |
| spellingShingle | Zong-Fan Yang Da-Wei Yao M. Le Delliou Ke Wang Model-independent test of the cosmic anisotropy with inverse distance ladder European Physical Journal C: Particles and Fields |
| title | Model-independent test of the cosmic anisotropy with inverse distance ladder |
| title_full | Model-independent test of the cosmic anisotropy with inverse distance ladder |
| title_fullStr | Model-independent test of the cosmic anisotropy with inverse distance ladder |
| title_full_unstemmed | Model-independent test of the cosmic anisotropy with inverse distance ladder |
| title_short | Model-independent test of the cosmic anisotropy with inverse distance ladder |
| title_sort | model independent test of the cosmic anisotropy with inverse distance ladder |
| url | https://doi.org/10.1140/epjc/s10052-025-13994-5 |
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