Near-Infrared Spectroscopy with IGRINS-2 for Studying Multiple Stellar Populations in Globular Clusters
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| Format: | Preprint |
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2025
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| author | Lim, Dongwook Lee, Young-Wook Yun, Sol Lee, Young Sun Chun, Sang-Hyun Oh, Heeyoung Lee, Jae-Joon Park, Chan Kim, Sanghyuk Jeong, Ueejeong Lee, Hye-In Park, Woojin Yu, Youngsam Kim, Yunjong Chun, Moo-Young Oh, Jae Sok Lee, Sungho Jang, Jeong-Gyun Jang, Bi-Ho Seong, Hyeon Cheol Kim, Hyun-Jeong Brooks, Cynthia B. Mace, Gregory N. Lee, Hanshin Good, John M. Jaffe, Daniel T. Kim, Kang-Min Yuk, In-Soo Hwang, Narae Park, Byeong-Gon Kim, Hwihyun Chinn, Brian Ramos, Francisco Prado, Pablo Diaz, Ruben White, John Tapia, Eduardo Olivares, Andres Oyarzun, Valentina Kurz, Emma Stecher, Hawi Quiroz, Carlos Arriagada, Ignacio Hayward, Thomas L. Suh, Hyewon Miller, Jen Xu, Siyi Farina, Emanuele Paolo Figura, Charlie Mocnik, Teo Hartman, Zachary Rawlings, Mark Stephens, Andrew Miller, Bryan Labrie, Kathleen Hirst, Paul |
| author_facet | Lim, Dongwook Lee, Young-Wook Yun, Sol Lee, Young Sun Chun, Sang-Hyun Oh, Heeyoung Lee, Jae-Joon Park, Chan Kim, Sanghyuk Jeong, Ueejeong Lee, Hye-In Park, Woojin Yu, Youngsam Kim, Yunjong Chun, Moo-Young Oh, Jae Sok Lee, Sungho Jang, Jeong-Gyun Jang, Bi-Ho Seong, Hyeon Cheol Kim, Hyun-Jeong Brooks, Cynthia B. Mace, Gregory N. Lee, Hanshin Good, John M. Jaffe, Daniel T. Kim, Kang-Min Yuk, In-Soo Hwang, Narae Park, Byeong-Gon Kim, Hwihyun Chinn, Brian Ramos, Francisco Prado, Pablo Diaz, Ruben White, John Tapia, Eduardo Olivares, Andres Oyarzun, Valentina Kurz, Emma Stecher, Hawi Quiroz, Carlos Arriagada, Ignacio Hayward, Thomas L. Suh, Hyewon Miller, Jen Xu, Siyi Farina, Emanuele Paolo Figura, Charlie Mocnik, Teo Hartman, Zachary Rawlings, Mark Stephens, Andrew Miller, Bryan Labrie, Kathleen Hirst, Paul |
| contents | Recent advancements in near-infrared (NIR) spectroscopy have opened new opportunities for studying multiple stellar populations in globular clusters (GCs), particularly for newly discovered clusters in the inner Milky Way. While optical spectroscopy has traditionally played a primary role in detailed chemical abundance studies of GCs, the increasing discovery of GCs in highly reddened environments underscores the need for robust NIR spectroscopic methods. To evaluate the utility of high-resolution NIR spectroscopy for studying multiple stellar populations, we observed six stars in M5, a well-studied halo GC, using the recently commissioned IGRINS-2 spectrograph on the Gemini-North telescope. Our chemical abundance measurements in the NIR wavelength range show good agreement with those derived from high-resolution optical spectroscopy, with minor systematic offsets in elements such as Na and Mg. In addition, the measured chemical abundance ratios clearly reproduce the distinctive patterns of multiple stellar populations, including the Na-O anti-correlation. The ability of NIR spectroscopy to measure C, N, and O abundances with high precision further enhances its utility for studying chemical properties of stars and GCs. Our findings demonstrate that IGRINS-2 and similar instruments have significant potential to advance our understanding of GC formation, stellar chemical evolution, and the evolutionary history of the Milky Way. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_03017 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Near-Infrared Spectroscopy with IGRINS-2 for Studying Multiple Stellar Populations in Globular Clusters Lim, Dongwook Lee, Young-Wook Yun, Sol Lee, Young Sun Chun, Sang-Hyun Oh, Heeyoung Lee, Jae-Joon Park, Chan Kim, Sanghyuk Jeong, Ueejeong Lee, Hye-In Park, Woojin Yu, Youngsam Kim, Yunjong Chun, Moo-Young Oh, Jae Sok Lee, Sungho Jang, Jeong-Gyun Jang, Bi-Ho Seong, Hyeon Cheol Kim, Hyun-Jeong Brooks, Cynthia B. Mace, Gregory N. Lee, Hanshin Good, John M. Jaffe, Daniel T. Kim, Kang-Min Yuk, In-Soo Hwang, Narae Park, Byeong-Gon Kim, Hwihyun Chinn, Brian Ramos, Francisco Prado, Pablo Diaz, Ruben White, John Tapia, Eduardo Olivares, Andres Oyarzun, Valentina Kurz, Emma Stecher, Hawi Quiroz, Carlos Arriagada, Ignacio Hayward, Thomas L. Suh, Hyewon Miller, Jen Xu, Siyi Farina, Emanuele Paolo Figura, Charlie Mocnik, Teo Hartman, Zachary Rawlings, Mark Stephens, Andrew Miller, Bryan Labrie, Kathleen Hirst, Paul Astrophysics of Galaxies Recent advancements in near-infrared (NIR) spectroscopy have opened new opportunities for studying multiple stellar populations in globular clusters (GCs), particularly for newly discovered clusters in the inner Milky Way. While optical spectroscopy has traditionally played a primary role in detailed chemical abundance studies of GCs, the increasing discovery of GCs in highly reddened environments underscores the need for robust NIR spectroscopic methods. To evaluate the utility of high-resolution NIR spectroscopy for studying multiple stellar populations, we observed six stars in M5, a well-studied halo GC, using the recently commissioned IGRINS-2 spectrograph on the Gemini-North telescope. Our chemical abundance measurements in the NIR wavelength range show good agreement with those derived from high-resolution optical spectroscopy, with minor systematic offsets in elements such as Na and Mg. In addition, the measured chemical abundance ratios clearly reproduce the distinctive patterns of multiple stellar populations, including the Na-O anti-correlation. The ability of NIR spectroscopy to measure C, N, and O abundances with high precision further enhances its utility for studying chemical properties of stars and GCs. Our findings demonstrate that IGRINS-2 and similar instruments have significant potential to advance our understanding of GC formation, stellar chemical evolution, and the evolutionary history of the Milky Way. |
| title | Near-Infrared Spectroscopy with IGRINS-2 for Studying Multiple Stellar Populations in Globular Clusters |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2504.03017 |