Perturbations of cosmological redshift drift

被引：2

作者：

Bessa, Pedro ^{[1
,2
,3
]}

Durrer, Ruth ^{[1
,2
]}

Stock, Dennis ^{[1
,2
]}

机构：

[1] Univ Geneva, Dept Phys Theor, 24 Quai Ernest Ansermet, CH-1211 Geneva 4, Switzerland

[2] Univ Geneva, Ctr Astroparticle Phys, 24 Quai Ernest Ansermet, CH-1211 Geneva 4, Switzerland

[3] Univ Fed Espirito Santo, PPGCosmo UFES, BR-29075910 Vitoria, Brazil

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2023年 / 11期

基金：

瑞士国家科学基金会;

关键词：

Cosmological perturbation theory in GR and beyond; power spectrum; dark energy theory;

D O I：

10.1088/1475-7516/2023/11/093

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper we calculate the linear perturbations of the cosmological redshift drift. We show explicitly that our expressions are gauge-invariant and compute the power spectrum of the redshift drift perturbations and its correlations with galaxy number counts within linear perturbation theory. Our findings show that the perturbations are small, and that the peculiar velocity and acceleration terms are dominating and cannot be neglected when modeling the full perturbative expression for the redshift drift. We also find that the cross-correlations with galaxy number count fluctuations might increase the detectability of the effect and can help to separate the perturbative effects from the background cosmological redshift drift signal.

引用

页数：22

共 50 条

[1] Closing the cosmological loop with the redshift drift
Martins, C. J. A. P.
Alves, C. S.
Esteves, J.
Lapel, A.
Pereira, B. G.
[J]. SIXTEENTH MARCEL GROSSMANN MEETING, 2023, : 2890 - 2905
[2] Forecast and analysis of the cosmological redshift drift
Lazkoz, Ruth
Leanizbarrutia, Iker
Salzano, Vincenzo
[J]. EUROPEAN PHYSICAL JOURNAL C, 2018, 78 (01):
[3] Cosmological impact of redshift drift measurements
Esteves, J.
Martins, C. J. A. P.
Pereira, B. G.
Alves, C. S.
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2021, 508 (01) : L53 - L57
[4] Forecast and analysis of the cosmological redshift drift
Ruth Lazkoz
Iker Leanizbarrutia
Vincenzo Salzano
[J]. The European Physical Journal C, 2018, 78
[5] Forecasts of redshift drift constraints on cosmological parameters
Alves, C. S.
Leite, A. C. O.
Martins, C. J. A. P.
Matos, J. G. B.
Silva, T. A.
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2019, 488 (03) : 3607 - 3624
[6] Redshift and redshift drift in Λ=0 quasispherical Szekeres cosmological models and the effect of averaging
Mishra, Priti
[J]. PHYSICAL REVIEW D, 2022, 105 (06)
[7] Redshift drift cosmography for model-independent cosmological inference
Heinesen, Asta
[J]. PHYSICAL REVIEW D, 2021, 104 (12)
[8] Redshift drift reconstruction for some cosmological models from observations
Zhang, Ming-Jian
Liu, Wen-Biao
[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS, 2013, 13 (12) : 1397 - 1408
[9] Redshift drift reconstruction for some cosmological models from observations
Ming-Jian Zhang
Wen-Biao Liu
[J]. Research in Astronomy and Astrophysics, 2013, 13 (12) : 1397 - 1408
[10] Anisotropic universe and observational constraint on the dark energy models with the cosmological redshift drift
Hossienkhani, H.
Azimi, N.
Gheysari, S.
Zarei, Z.
[J]. NEW ASTRONOMY, 2021, 84

← 1 2 3 4 5 →