用透镜超新星测量宇宙膨胀

IF 1.1 4区物理与天体物理 Q4 PHYSICS, APPLIED

Technical Physics Pub Date : 2023-05-18 DOI:10.1103/physics.16.85

Michael Schirber

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引用次数: 0

摘要

今年是埃德温·哈勃观测到仙女座星云中一颗被称为造父变星的脉动恒星100周年。这颗恒星非常微弱，这意味着它非常遥远，仙女座一定是一个独立的星系——这是我们银河系并不孤单的第一个证据。哈勃继续发现了其他星系，并发现它们都在远离我们——宇宙膨胀的特征就是所谓的哈勃常数。天文学家现在使用了另一颗恒星，一颗爆炸的恒星

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Measuring Cosmic Expansion with a Lensed Supernova

T his year marks the 100th anniversary of Edwin Hubble’s observation of a pulsating star called a Cepheid variable in the Andromeda nebula. The star was surprisingly faint, implying that it was very far away and that Andromeda must be a separate galaxy—the first evidence that our Milky Way is not alone. Hubble went on to uncover other galaxies and found that they were all moving away from us—a cosmic expansion characterized by the so-called Hubble constant. Astronomers have now used another star, an exploding

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来源期刊

Technical Physics 物理-物理：应用

CiteScore

1.30

自引率

14.30%

发文量

139

审稿时长

3-6 weeks

期刊介绍： Technical Physics is a journal that contains practical information on all aspects of applied physics, especially instrumentation and measurement techniques. Particular emphasis is put on plasma physics and related fields such as studies of charged particles in electromagnetic fields, synchrotron radiation, electron and ion beams, gas lasers and discharges. Other journal topics are the properties of condensed matter, including semiconductors, superconductors, gases, liquids, and different materials.