标题： GLASS-JWST的早期结果。 XXVII. 使用NIRISS在宇宙正午透镜场星系中的质量-金属度关系 显示英文标题

标题： Early results from GLASS-JWST. XXVII. The mass-metallicity relation in lensed field galaxies at cosmic noon with NIRISS

摘要： 我们利用GLASS-JWST早期发布科学计划获得的JWST近红外宽场 slitless 光谱，测量了宇宙正午时期的星系质量和金属丰度关系（MZR）。通过结合JWST和前景星团A2744的透镜放大效应，我们将MZR的测量扩展到了高红shift的小质量星系范围。在恒星质量范围为$\log{(M_*/M_\odot)}\in [6.9, 10.0]$的两个宽红shift范围$z=1.8-2.3$和$2.6-3.4$内，识别出包含多种发射线的50个星系样本。在这两个红shift范围内，观测到的MZR斜率分别为$0.223 \pm 0.017$和$0.294 \pm 0.010$，与在更高质量场星系中测量的斜率一致。此外，我们通过比较使用2D前向建模和线轮廓拟合到1D提取光谱的两种方法，评估了形态展宽对发射线测量的影响。结果显示，忽略从光栅光谱推导线流量时的形态展宽效应，平均会导致系统性减少$\sim30\%$的流量。这种差异似乎影响所有线，并未导致流量比和金属丰度测量的显著变化。本次利用JWST数据对形态展宽效应的评估，首次为未来利用宽场 slitless 光谱（如欧几里得卫星、罗曼空间望远镜和中国空间站望远镜）推导星系线流量提供了重要的指导原则。 显示英文摘要

摘要： We present a measurement of the mass-metallicity relation (MZR) at cosmic noon, using the JWST near-infrared wide-field slitless spectroscopy obtained by the GLASS-JWST Early Release Science program. By combining the power of JWST and the lensing magnification by the foreground cluster A2744, we extend the measurements of the MZR to the dwarf mass regime at high redshifts. A sample of 50 galaxies with several emission lines is identified across two wide redshift ranges of $z=1.8-2.3$ and $2.6-3.4$ in the stellar mass range of $\log{(M_*/M_\odot)}\in [6.9, 10.0]$. The observed slope of MZR is $0.223 \pm 0.017$ and $0.294 \pm 0.010$ at these two redshift ranges, respectively, consistent with the slopes measured in field galaxies with higher masses. In addition, we assess the impact of the morphological broadening on emission line measurement by comparing two methods of using 2D forward modeling and line profile fitting to 1D extracted spectra. We show that ignoring the morphological broadening effect when deriving line fluxes from grism spectra results in a systematic reduction of flux by $\sim30\%$ on average. This discrepancy appears to affect all the lines and thus does not lead to significant changes in flux ratio and metallicity measurements. This assessment of the morphological broadening effect using JWST data presents, for the first time, an important guideline for future work deriving galaxy line fluxes from wide-field slitless spectroscopy, such as Euclid, Roman, and the Chinese Space Station Telescope.