论文标题
在Z = 1.88的大规模缓慢淬火的镜头静态星系中，最近的恒星形成了
Recent Star-formation in a Massive Slowly-Quenched Lensed Quiescent Galaxy at z=1.88
论文作者
论文摘要
在这封信中，我们重建了MRG-S0851的编队途径，一个巨大的，$ \ log m _*/m_ \ odot = 11.02 \ pm0.04 $，强烈镜头，红色，$ z = 1.883 \ pm0.001 $。 While the global photometry and spatially-resolved outskirts of MRG-S0851 imply an early-formation scenario with a slowly decreasing or constant star-formation history, a joint fit of 2D grism spectroscopy and photometry reveals a more complex scenario: MRG-S0851 is likely to be experiencing a centrally-concentrated rejuvenation in the inner $\sim$1 kpc in the last $ \ sim $ 100进化。我们估计总恒星质量的$ 0.5 \ pm0.1 \％$在此阶段形成。恢复活力的发作被认为是$ z \ sim2 $的大型星系很少见，但是当我们的分析表明，更多复杂的恒星形成历史史的例子可能会隐藏在现有数据中。 By adding a FUV color criterion to the standard U-V/V-J diagnostic, thereby heightening our sensitivity to recent star formation, we show that we can select populations of galaxies with similar spectral energy distributions to that of MRG-S0851, but note that deep follow-up spectroscopic observations and/or spatially resolved analyses are necessary to robustly confirm the rejuvenation of these candidates.将我们的标准与MRG-S0851作为原型，我们估计$ \ sim $ 1 \％以$ 1 <z <2 $ $ 1 <z <2 $的大规模静态星系可能会恢复活力。
In this letter, we reconstruct the formation pathway of MRG-S0851, a massive, $\log M_*/M_\odot=11.02\pm0.04$, strongly lensed, red, galaxy at $z=1.883\pm0.001$. While the global photometry and spatially-resolved outskirts of MRG-S0851 imply an early-formation scenario with a slowly decreasing or constant star-formation history, a joint fit of 2D grism spectroscopy and photometry reveals a more complex scenario: MRG-S0851 is likely to be experiencing a centrally-concentrated rejuvenation in the inner $\sim$1 kpc in the last $\sim$100 Myr of evolution. We estimate $0.5\pm0.1\%$ of the total stellar mass is formed in this phase. Rejuvenation episodes are suggested to be infrequent for massive galaxies at $z\sim2$, but as our analyses indicate, more examples of complex star-formation histories may yet be hidden within existing data. By adding a FUV color criterion to the standard U-V/V-J diagnostic, thereby heightening our sensitivity to recent star formation, we show that we can select populations of galaxies with similar spectral energy distributions to that of MRG-S0851, but note that deep follow-up spectroscopic observations and/or spatially resolved analyses are necessary to robustly confirm the rejuvenation of these candidates. Using our criteria with MRG-S0851 as a prototype, we estimate that $\sim$1\% of massive quiescent galaxies at $1<z<2$ are potentially rejuvenating.
