Cosmological Constraints using the Void Size Function Data from BOSS DR16
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2025
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866910981556273152 |
|---|---|
| author | Song, Yingxiao Gong, Yan Zhou, Xingchen Miao, Haitao Chan, Kwan Chuen Chen, Xuelei |
| author_facet | Song, Yingxiao Gong, Yan Zhou, Xingchen Miao, Haitao Chan, Kwan Chuen Chen, Xuelei |
| contents | We measure the void size function (VSF) from the Baryon Oscillation Spectroscopic Survey (BOSS DR16) and perform the cosmological constraints. The BOSS DR16 galaxy sample is selected in the redshift range from $z = 0.2$ to 0.8, considering the selection criteria based on galaxy number density. We identify non-spherical voids from this galaxy catalog using the Voronoi tessellation and watershed algorithm without assuming any void shape. We select the void samples based on the void ellipticity, and derive the VSFs in two redshift bins, i.e. $z=0.2-0.5$ and $0.5-0.8$. The VSF model we use is based on the excursion-set theory, including the void linear underdensity threshold $δ_{\rm v}$ and the redshift space distortion (RSD) parameter $B$. The Markov Chain Monte Carlo (MCMC) method is applied to perform the joint constraints on the cosmological and void parameters. We find that the VSF measurement from BOSS DR16 gives $w = -1.263_{-0.396}^{+0.329}$, $Ω_{\rm m} = 0.293_{-0.053}^{+0.060}$, and $σ_8 = 0.897_{-0.192}^{+0.159}$, which can be a good complementary probe to galaxy clustering measurements. Our method demonstrates the potential of using the VSF to study cosmological models, and it can provide a reference for future VSF analysis in the upcoming galaxy spectroscopic surveys. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_07817 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Cosmological Constraints using the Void Size Function Data from BOSS DR16 Song, Yingxiao Gong, Yan Zhou, Xingchen Miao, Haitao Chan, Kwan Chuen Chen, Xuelei Cosmology and Nongalactic Astrophysics We measure the void size function (VSF) from the Baryon Oscillation Spectroscopic Survey (BOSS DR16) and perform the cosmological constraints. The BOSS DR16 galaxy sample is selected in the redshift range from $z = 0.2$ to 0.8, considering the selection criteria based on galaxy number density. We identify non-spherical voids from this galaxy catalog using the Voronoi tessellation and watershed algorithm without assuming any void shape. We select the void samples based on the void ellipticity, and derive the VSFs in two redshift bins, i.e. $z=0.2-0.5$ and $0.5-0.8$. The VSF model we use is based on the excursion-set theory, including the void linear underdensity threshold $δ_{\rm v}$ and the redshift space distortion (RSD) parameter $B$. The Markov Chain Monte Carlo (MCMC) method is applied to perform the joint constraints on the cosmological and void parameters. We find that the VSF measurement from BOSS DR16 gives $w = -1.263_{-0.396}^{+0.329}$, $Ω_{\rm m} = 0.293_{-0.053}^{+0.060}$, and $σ_8 = 0.897_{-0.192}^{+0.159}$, which can be a good complementary probe to galaxy clustering measurements. Our method demonstrates the potential of using the VSF to study cosmological models, and it can provide a reference for future VSF analysis in the upcoming galaxy spectroscopic surveys. |
| title | Cosmological Constraints using the Void Size Function Data from BOSS DR16 |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2501.07817 |