宇宙时期快速射电暴主色散测量的红移依赖性

IF 5.9 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-01-09 DOI:10.1088/1475-7516/2025/01/036

Sandeep Kumar Acharya and Paz Beniamini

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引用次数: 0

摘要

我们通过假设局部快速射电暴（frb）色散测量作为一个简单的幂律（∝(1+z)α）变化来约束（静止帧）宿主星系色散测量的红移依赖性。我们同时对已知红移的快速射电暴数据进行了α和主色散的拟合。我们发现α在0到1之间是首选的，这取决于我们的建模选择。目前的数据可以在68%的置信区间内约束|α| > 2。这些限制对我们对星系形成的理解有影响，可以用来为星系和大规模模拟提供信息。

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Redshift dependence of FRB host dispersion measures across cosmic epochs

We constrain the redshift dependence of (rest frame) host galaxy dispersion measures of localized Fast Radio Bursts (FRBs) by assuming it to vary as a simple power law (∝ (1+z)α). We simultaneously fit α as well as the host dispersion measure to the data of FRBs with known redshifts. We find that α between 0 to 1 is preferred depending upon our modelling choices. Current data can constrain |α| ≲ 2 at a 68 percent confidence interval. Such constraints have implications for our understanding of galaxy formation and can be used to inform galaxy and large scale simulations.

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来源期刊

Journal of Cosmology and Astroparticle Physics 地学天文-天文与天体物理

CiteScore

10.20

自引率

23.40%

发文量

632

审稿时长

1 months

期刊介绍： Journal of Cosmology and Astroparticle Physics (JCAP) encompasses theoretical, observational and experimental areas as well as computation and simulation. The journal covers the latest developments in the theory of all fundamental interactions and their cosmological implications (e.g. M-theory and cosmology, brane cosmology). JCAP''s coverage also includes topics such as formation, dynamics and clustering of galaxies, pre-galactic star formation, x-ray astronomy, radio astronomy, gravitational lensing, active galactic nuclei, intergalactic and interstellar matter.