We use the Cosmic Assembly Deep Near-infrared Extragalactic Legacy Survey data to study the relationship between quenching and the stellar mass surface density within the central radius of 1 kpc (Σ₁) of low-mass galaxies (stellar mass M _* ≲ 10^9.5 M _⊙) at 0.5 ≤ z < 1.5. Our sample is mass complete down to ∼10⁹ M _⊙ at 0.5 ≤ z < 1.0. We compare the mean Σ₁ of star-forming galaxies (SFGs) and quenched galaxies (QGs) at the same redshift and M _*. We find that low-mass QGs have a higher Σ₁ than low-mass SFGs, similar to galaxies above 10¹⁰ M _⊙. The difference of Σ₁ between QGs and SFGs increases slightly with M _* at M _* ≲ 10¹⁰ M _⊙ and decreases with M _* at M _* ≳ 10¹⁰ M _⊙. The turnover mass is consistent with the mass where quenching mechanisms transition from internal to environmental quenching. At 0.5 ≤ z < 1.0, we find that Σ₁ of galaxies increases by about 0.25 dex in the green valley (i.e., the transition region from star forming to fully quenched), regardless of their M _*. Using the observed specific star formation rate gradient in the literature as a constraint, we estimate that the quenching timescale (i.e., time spent in the transition) of low-mass galaxies is a few (∼4) Gyr at 0.5 ≤ z < 1.0. The mechanisms responsible for quenching need to gradually quench star formation in an outside-in way, i.e., preferentially ceasing star formation in outskirts of galaxies while maintaining their central star formation to increase Σ₁. An interesting and intriguing result is the similarity of the growth of Σ₁ in the green valley between low-mass and massive galaxies, which suggests that the role of internal processes in quenching low-mass galaxies is a question worthy of further investigation.

我们使用宇宙大会深近红外河外星系传统的调查数据，研究淬火和恒星质量表面密度之间1个KPC的中心半径范围内（Σ关系₁）的低质量星系（恒星质量中号 _* ≲10 ^9.5 中号 _⊙ ) 在 0.5 ≤ z < 1.5。我们的样本在 0.5 ≤ z < 1.0 时质量完整，低至 ∼10 ⁹ M _⊙。我们比较了相同红移和M _*的恒星形成星系 (SFG) 和淬灭星系 (QG)的平均 Σ ₁。我们发现低质量 QG比低质量 SFG具有更高的 Σ ₁，类似于 10 以上的星系 ¹⁰ 中号 _⊙。QGs 和SFGs 之间Σ ₁的差异在M _* ≲ 10 ¹⁰ M _⊙处随M _*略有增加，在M _* ≳ 10 ¹⁰ M _⊙处随M _*减小。周转质量与淬火机制从内部淬火过渡到环境淬火的质量一致。在 0.5 ≤ z < 1.0 时，我们发现星系的Σ ₁在绿色山谷（即从恒星形成到完全淬灭的过渡区域）增加了大约 0.25 dex，而不管它们的M _* . 使用文献中观察到的特定恒星形成率梯度作为约束，我们估计低质量星系的淬灭时间尺度（即在过渡中花费的时间）在 0.5 ≤ z < 1.0 时为几个（~4）Gyr 。猝灭机制需要从外向内逐渐猝灭恒星的形成，即优先停止星系外围的恒星形成，同时保持其中心恒星的形成，以增加Σ ₁。一个有趣且耐人寻味的结果是低质量星系和大质量星系之间绿色山谷中Σ ₁增长的相似性，这表明内部过程在使低质量星系猝灭中的作用是一个值得进一步研究的问题。