A new cosmological probe using super-massive black hole shadows

被引：23
|
作者：
Qi Jing-Zhao [1 ]
Zhang Xin [1 ,2 ,3 ,4 ]
机构：
[1] Northeastern Univ, Dept Phys, Coll Sci, Shenyang 110819, Peoples R China
[2] Northeastern Univ, Minist Educ, Key Lab Data Analyt & Optimizat Smart Ind, Shenyang 110819, Peoples R China
[3] Peking Univ, Ctr High Energy Phys, Beijing 100080, Peoples R China
[4] Yangzhou Univ, Ctr Gravitat & Cosmol, Yangzhou 225009, Jiangsu, Peoples R China
来源：
CHINESE PHYSICS C | 2020年 / 44卷 / 05期
基金：
中国国家自然科学基金;
关键词：
black hole shadow; cosmological probe; standard ruler; cosmological parameters; the Hubble constant; DISKS;
D O I：
10.1088/1674-1137/44/5/055101
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We study the prospects of using the low-redshift and high-redshift black hole shadows as new cosmological standard rulers for measuring cosmological parameters. We show that, using the low-redshift observation of the black hole shadow of M87(star), the Hubble constant can be independently determined with a precision of about 13% as H-0 = 70 +/- 9 km s(-1) Mpc(-1). The high-redshift observations of super-massive black hole shadows may accurately determine a combination of parameters H-0 and Omega(m), and we show by a simple simulation that combining them with the type Ia supernovae observations would give precise measurements of the cosmological parameters.
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页数：5
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