利用 IGRINS-2 进行近红外光谱以研究全球星团中的多种星际物种
星系天体物理
2025-04-07 v1
摘要
近红外（NIR）光谱的最新进展为研究全球星团（GC）中的多种星际物种提供了新的机会，尤其对于新近发现的位于银河内侧的星团。虽然光谱学传统上在详细的化学丰度研究中发挥着主要作用，但日益增多的高度掩蔽环境中银河系内星团的发现凸显了对稳健 NIR 光谱方法的需求。为评估高分辨率 NIR 光谱在研究多种星际物种中的实用性，我们使用 Gemini-North 望远镜上新近装机的 IGRINS-2 光谱仪对 M5 中的六颗恒星进行观测。我们的 NIR 波段化学丰度测量与来自高分辨率光谱学的测量结果良好一致，Na 和 Mg 等元素的系统偏差较小。此外，测得的化学丰度比率清晰地再现了多种星际物种的独特模式，包括 Na-O 反相关。NIR 光谱能够高精度测量 C、N、O 丰度的能力进一步增强了其研究星体和星团化学性质的潜力。我们的发现表明，IGRINS-2 及类似仪器在深化我们对星团形成、星体化学演化以及银河系演化历史的理解方面具有重要潜力。
引用
@article{arxiv.2504.03017,
title = {Near-Infrared Spectroscopy with IGRINS-2 for Studying Multiple Stellar Populations in Globular Clusters},
author = {Dongwook Lim and Young-Wook Lee and Sol Yun and Young Sun Lee and Sang-Hyun Chun and Heeyoung Oh and Jae-Joon Lee and Chan Park and Sanghyuk Kim and Ueejeong Jeong and Hye-In Lee and Woojin Park and Youngsam Yu and Yunjong Kim and Moo-Young Chun and Jae Sok Oh and Sungho Lee and Jeong-Gyun Jang and Bi-Ho Jang and Hyeon Cheol Seong and Hyun-Jeong Kim and Cynthia B. Brooks and Gregory N. Mace and Hanshin Lee and John M. Good and Daniel T. Jaffe and Kang-Min Kim and In-Soo Yuk and Narae Hwang and Byeong-Gon Park and Hwihyun Kim and Brian Chinn and Francisco Ramos and Pablo Prado and Ruben Diaz and John White and Eduardo Tapia and Andres Olivares and Valentina Oyarzun and Emma Kurz and Hawi Stecher and Carlos Quiroz and Ignacio Arriagada and Thomas L. Hayward and Hyewon Suh and Jen Miller and Siyi Xu and Emanuele Paolo Farina and Charlie Figura and Teo Mocnik and Zachary Hartman and Mark Rawlings and Andrew Stephens and Bryan Miller and Kathleen Labrie and Paul Hirst},
journal= {arXiv preprint arXiv:2504.03017},
year = {2025}
}
备注
12 pages, 7 figures, accepted for publication in JKAS