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<p>Observations by the James Webb Space Telescope (JWST) have led to a series of groundbreaking discoveries that challenge our current understanding of early galaxy formation. A large number of galaxies have been surprisingly identified during the epoch of cosmic dawn, the redshift of <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10509_2025_4467_Article_IEq1.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="86" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <mi>z</mi> <mo>∼</mo> <mn>11</mn> <mo>−</mo> <mn>14</mn> </math></EquationSource> <EquationSource Format="TEX">$z\sim 11-14$</EquationSource> </InlineEquation>, 13.4 to 13.5 billion years ago, far exceeding theoretical predictions. Additionally, many faint AGNs hosting supermassive black holes have been discovered at <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10509_2025_4467_Article_IEq2.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="41" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <mi>z</mi> <mo>&gt;</mo> <mn>4</mn> </math></EquationSource> <EquationSource Format="TEX">$z&gt;4$</EquationSource> </InlineEquation>. What was happening in the early universe? This article provides an overview of these latest findings.</p>

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Early galaxies and supermassive black holes discovered by the James Webb Space Telescope

  • 期刊论文

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  • 发表日期：

    2025年8月18日

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  • Yuichi Harikane

摘要

Observations by the James Webb Space Telescope (JWST) have led to a series of groundbreaking discoveries that challenge our current understanding of early galaxy formation. A large number of galaxies have been surprisingly identified during the epoch of cosmic dawn, the redshift of z ∼ 11 − 14 $z\sim 11-14$ , 13.4 to 13.5 billion years ago, far exceeding theoretical predictions. Additionally, many faint AGNs hosting supermassive black holes have been discovered at z > 4 $z>4$ . What was happening in the early universe? This article provides an overview of these latest findings.