Lockman-SpReSO 项目：远红外星系样本中的星系流
The Lockman-SpReSO project. Galactic flows in a sample of far-infrared galaxies
AI总结：
本文基于 Lockman-SpReSO 项目远红外星系样本，通过测量 Mg II 和 Fe II 等谱线的等值宽度与速度，发现星系流特征与恒星质量及恒星形成率存在显著相关性，并探测到一个候选的徘徊外流类星体。
摘要：
方法：我们对所选样本光谱中存在的 Mg II、Mg I、Fe IIa、Fe IIb 和 Fe IIc 谱线进行了测量，以确定在恒星形成星系中观测到的星系流的等值宽度（EW）和速度。随后，我们利用斯皮尔曼秩相关系数（ρ_s）进行了 10^7 次自助（bootstrap）模拟，以探索其与星系性质的相关性。此外，我们还计算了所测 Fe II 双线的覆盖因子、气体密度和光学深度。结果：我们的分析揭示了 Mg II 谱线的等值宽度与恒星质量 M_*（ρ_s=0.43，4.5σ）和恒星形成率 SFR（ρ_s=0.42，4.4σ）之间存在强相关性。对于 Fe II 谱线，我们观测到其等值宽度与 SFR 之间存在强相关性（ρ_s≈0.65，>3.9σ），而与 M_* 的相关性较弱（ρ_s≈0.35，>1.9σ）。在 Mg II 谱线的速度测量值与天体的 M_*、SFR 或 sSFR 之间未发现显著相关性（ρ_s≈0.1）。然而，我们发现 Fe II 谱线的速度与星系的 SFR 之间存在较强的负相关（ρ_s≈-0.45，约 3σ）。我们的结果与先前的研究一致，但研究对象为远红外选源。最后，我们在红移 z=1.4399 处探测到一个候选的“徘徊外流”（loitering outflow），这是最近发现的 FeLoBAL 类星体的一种亚型，表现出 C III] 发射和低谱线速度（|v|≲200 km/s）。
英文摘要：
Methods. We performed measurements of the \MgII, \MgI, \FeIIa, \FeIIb, and \FeIIc\ spectral lines present in the spectra of the selected sample to determine the EW and velocity of the flows observed in the star-forming galaxies. Subsequently, we conducted $10^7$ bootstrap simulations using Spearman's rank correlation coefficient ($ρ_s$) to explore correlations with galaxy properties. Furthermore, we calculated the covering factor, gas density, and optical depth for the measured \ion{Fe}{II} doublets. Results. Our analysis revealed strong correlations between the EW of \ion{Mg}{II} lines and both $M_{*}$ ($ρ_s=0.43$, 4.5$σ$) and SFR ($ρ_s=0.42$, 4.4$σ$). For the \ion{Fe}{II} lines, we observed strong correlations between the EW and SFR ($ρ_s\sim0.65$, $>3.9σ$), with a weaker correlation for $M_{*}$ ($ρ_s\sim0.35$, $>1.9σ$). No notable correlations were found between velocity measurements of \ion{Mg}{II} line and $M_{*}$, SFR, or sSFR of the objects ($ρ_s\sim0.1)$. However, a negative strong correlation was found between the velocity of the \ion{Fe}{II} lines and the SFR of the galaxies ($ρ_s\sim-0.45$, $\sim3σ$). Our results align with previous studies but studying FIR-selected objects. Finally, we detected a candidate \textit{loitering outflow}, a recently discovered subtype of FeLoBAL quasar, at redshift of $z=1.4399$, exhibiting emission in \ion{C}{III}] and low line velocities ($|v|\lesssim$ 200 km/s).
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
