论文标题
MOSDEF调查：校准H $α$星形形成率与无线电连续体光度之间的关系，$ 1.4 <z <2.6 $
The MOSDEF Survey: Calibrating the relationship between H$α$ star-formation rate and radio continuum luminosity at $1.4 < z < 2.6$
论文作者
论文摘要
低红移星系的恒星形成速率（SFR）和它们的无线电连续体光度之间观察到的经验关系提供了一种潜在的方法，可以在高红移星系中测量SFR，而不受灰尘遮盖的影响。在这项研究中，我们使用尘埃校正的H $α$ SFR进行了高红移的SFR-Radio Continuum关系中的红移演化的首次测试。我们的样本包括Mosfire深层进化场（MOSDEF）调查的178个星系，$ 1.4 <z <2.6 $，带有静止光谱光谱和1.5 GHz无线电连续观测，来自Karl G. Jansky非常大的阵列（VLA）商品北面。使用堆叠分析，我们将观察到的无线电连续仪与尘埃校正的H $α$ SFR预测的无线电连续亮度进行比较，假设$ z \ sim0 $关系范围。当将无线电连续体堆叠为尘埃校正的H $α$ SFR的函数以及将光谱和无线电连续体堆叠起来时，我们没有发现具有红移系统进化的证据。我们得出的结论是，SFR和无线电连续体光度之间的本地校准关系仍然有效为$ z \ sim 2 $。
The observed empirical relation between the star-formation rates (SFR) of low-redshift galaxies and their radio continuum luminosity offers a potential means of measuring SFR in high redshift galaxies that is unaffected by dust obscuration. In this study, we make the first test for redshift evolution in the SFR-radio continuum relation at high redshift using dust-corrected H$α$ SFR. Our sample consists of 178 galaxies from the MOSFIRE Deep Evolution Field (MOSDEF) Survey at $1.4 < z < 2.6$ with rest-frame optical spectroscopy and deep 1.5 GHz radio continuum observations from the Karl G. Jansky Very Large Array (VLA) GOODS North field. Using a stacking analysis we compare the observed radio continuum luminosities with those predicted from the dust-corrected H$α$ SFR assuming a range of $z\sim0$ relations. We find no evidence for a systematic evolution with redshift, when stacking the radio continuum as a function of dust-corrected H$α$ SFR and when stacking both optical spectroscopy and radio continuum as a function of stellar mass. We conclude that locally calibrated relations between SFR and radio continuum luminosity remain valid out to $z\sim 2$.
