arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新，休息一下吧，周末愉快~~
arXiv 2307.09503astro-ph.GA
收藏

CEERS关键论文 VIII：z>2处NIRSpec和NIRCam宽场无缝光谱的发射线比率

CEERS Key Paper VIII: Emission Line Ratios from NIRSpec and NIRCam Wide-Field Slitless Spectroscopy at z>2

Bren E. Backhaus, Jonathan R. Trump, Nor Pirzkal, Guillermo Barro, Steven L. Finkelstein, Pablo Arrabal Haro, Raymond C. Simons, Jessica Wessner, Nikko J. Cleri… 展开作者

Bren E. Backhaus, Jonathan R. Trump, Nor Pirzkal, Guillermo Barro, Steven L. Finkelstein, Pablo Arrabal Haro, Raymond C. Simons, Jessica Wessner, Nikko J. Cleri, Michaela Hirschmann, Micaela B. Bagley, David C. Nicholls, Mark Dickinson, Jeyhan S. Kartaltepe, Casey Papovich, Dale D. Kocevski, Anton M. Koekemoer, Laura Bisigello, Anne E. Jaskot, Ray A. Lucas, Intae Jung, Stephen M. Wilkins, L. Y. Aaron Yung, Henry C. Ferguson, Adriano Fontana, Andrea Grazian, Norman A. Grogin, Lisa J. Kewley, Allison Kirkpatrick, Jennifer M. Lotz, Laura Pentericci, Pablo G. Perez-Gonzalez, Swara Ravindranath, Rachel S. Somerville, Guang Yang, Benne W. Holwerda, Peter Kurczynski, Nimish P. Hathi, Caitlin Rose, Kelcey Davis

备注：
16 pages, 11 figures
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

AI总结：

本研究利用JWST的NIRCam WFSS和NIRSpec测量了155个z>2星系的发射线，发现[OIII]/Hb等比率与红移、恒星质量和SFR存在相关性，且与低金属丰度和高电离度模型一致。

摘要：

我们使用詹姆斯·韦伯空间望远镜近红外相机宽场无缝光谱（NIRCam WFSS）和近红外光谱仪（NIRSpec）在宇宙演化早期释放巡天（CEERS）中测量了155个z>2星系的静止系光学发射线。盲测NIRCam光栅观测包含了具有明亮发射线且未被NIRSpec掩模观测的星系样本。我们通过与较低红移的SDSS和CLEAR样本进行比较，研究了Ha、[OIII]/Hb和[NeIII]/[OII]发射线随红移的变化。我们发现[OIII]/Hb与红移存在显著（>3σ）相关性，而[NeIII]/[OII]与红移存在边际（2σ）相关性。我们将[OIII]/Hb和[NeIII]/[OII]与恒星质量和Hb SFR进行了比较。我们发现这两种发射线比率均与Hb SFR相关，且在0<z<9的红移范围内与恒星质量呈反相关。与MAPPINGS V模型的比较表明，这些趋势与低质量和高SFR星系中较低的金属丰度和较高的电离度相一致。我们额外与IllustriousTNG预测进行了比较，发现它们能有效描述我们样本中观测到的最高[OIII]/Hb比率，而无需调用具有显著激波电离分量的MAPPINGS模型。

英文摘要：

We use James Webb Space Telescope Near-Infrared Camera Wide Field Slitless Spectroscopy (NIRCam WFSS) and Near-Infrared spectrograph (NIRSpec) in the Cosmic Evolution Early Release survey (CEERS) to measure rest-frame optical emission-line of 155 galaxies at z>2. The blind NIRCam grism observations include a sample of galaxies with bright emission lines that were not observed on the NIRSpec masks. We study the changes of the Ha, [OIII]/Hb, and [NeIII]/[OII] emission lines in terms of redshift by comparing to lower redshift SDSS and CLEAR samples. We find a significant (>3$σ$) correlation between [OIII]/Hb with redshift, while [NeIII]/[OII] has a marginal (2$σ$) correlation with redshift. We compare [OIII]/Hb and [NeIII]/[OII] to stellar mass and Hb SFR. We find that both emission-line ratios have a correlation with Hb SFR and an anti-correlation with stellar mass across the redshifts 0<z<9. Comparison with MAPPINGS~V models indicates that these trends are consistent with lower metallicity and higher ionization in low-mass and high-SFR galaxies. We additionally compare to IllustriousTNG predictions and find that they effectively describe the highest [OIII]/Hb ratios observed in our sample, without the need to invoke MAPPINGS models with significant shock ionizionation components.

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。

↑