A Reliable Calibration of H II Galaxies Hubble Diagram with Cosmic Chronometers and Artificial Neural Network

被引：5

作者：

Zhang, Jian-Chen ^{[1
,2
,3
,4
]}

Jiao, Kang ^{[1
,2
,5
]}

Zhang, Tingting ^{[6
]}

Zhang, Tong-Jie ^{[1
,2
,4
]}

Yu, Bo ^{[4
,7
,8
]}

机构：

[1] Beijing Normal Univ, Inst Frontiers Astron & Astrophys, Beijing 102206, Peoples R China

[2] Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China

[3] Dezhou Univ, Coll Comp & Informat Engn, Dezhou 253023, Peoples R China

[4] Dezhou Univ, Inst Astron Sci, Dezhou 253023, Peoples R China

[5] Alma Mater Studiorum Univ Bologna, Dipartimento Fis & Astron Augusto Righi, Via Piero Gobetti 93-2, I-40129 Bologna, Italy

[6] PLA Army Engn Univ, Coll Command & Control Engn, Nanjing 210000, Peoples R China

[7] Dezhou Univ, Sch Math & Big Data, Dezhou 253023, Peoples R China

[8] Dezhou Univ, Inst Biophys, Shandong Prov Key Lab Biophys, Dezhou 253023, Peoples R China

来源：

ASTROPHYSICAL JOURNAL | 2022年 / 936卷 / 01期

基金：

美国国家科学基金会;

关键词：

INDEPENDENT COSMOLOGICAL CONSTRAINTS; LUMINOUS RED GALAXIES; PRECISION COSMOLOGY; PARAMETERS; SUPERNOVAE; CONSTANT; LAMBDA;

D O I：

10.3847/1538-4357/ac85aa

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The L-sigma relation of H II galaxies (HIIGx) calibrated by a distance indicator is a reliable standard candle for measuring the Hubble constant H-0. The most straightforward calibration technique anchors them with the first tier of distance ladders from the same galaxies. Recently another promising method that uses the cosmological model-independent cosmic chronometers as a calibrator has been proposed. We promote this technique by removing the assumptions about the cosmic flatness and using a nonparametric artificial neural network for the data reconstruction process. We observe a correlation between the cosmic curvature density parameter and the slope of the L-sigma relation, thereby improving the reliability of the calibration. Using the calibrated HIIGx Hubble diagram, we obtain a Type Ia supernovae Hubble diagram free of the conventional assumption about H-0. Finally we get a value of H-0 = 65.9(-2.9)(+3.0) km s(-1) Mpc(-1), which is compatible with the latest Planck 18 measurement.

引用

页数：8

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