A comparative test of the ΛCDM and Rh = ct cosmologies based on upcoming redshift drift measurements

被引：0

作者：

Melia, F. ^{[1
,2
]}

机构：

[1] Univ Arizona, Appl Math Program, Dept Phys, Tucson, AZ 85721 USA

[2] Univ Arizona, Dept Astron, Tucson, AZ 85721 USA

来源：

EPL | 2024年 / 148卷 / 04期

关键词：

GALAXY CANDIDATES; UNIVERSE; DECELERATION; LUMINOSITY; HORIZON; MODEL;

D O I：

10.1209/0295-5075/ad8fcb

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A measurement of the redshift drift constitutes a model-independent probe of fundamental cosmology. Several approaches are being considered to make the necessary observations, using i) the Extremely Large Telescope (ELT), ii) the Cosmic Accelerometer, and iii) the differential redshift drift methodology. Our focus in this letter is to assess how these upcoming measurements may be used to compare the predictions of Lambda CDM with those of the alternative Friedmann-Lemaitre-Robertson-Walker cosmology known as the R-h = ct universe, and several other models, including modified gravity scenarios. The ELT should be able to distinguish between R-h = ct and the other models at better than 3 sigma for z greater than or similar to 3.6 after 20 years of monitoring, while the Cosmic Accelerometer may be able to achieve the same result with sources at z greater than or similar to 2.6 after only 10 years. Copyright (c) 2024 The author(s)

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