arXiv 2607.27395physics.gen-ph

低金属丰度大质量恒星的多重性：BLOeM项目的早期结果

Multiplicity of Massive Stars at Low Metallicity: Early Results from the BLOeM Campaign

T. Shenar, J. Bodensteiner, M. Abdul-Masih, F. Backs, S. R. Berlanas, J. M. Bestenlehner, A. Bobrick, D. M. Bowman, N. Britavskiy, P. A. Crowther, K. Deshmukh, … 展开作者

T. Shenar, J. Bodensteiner, M. Abdul-Masih, F. Backs, S. R. Berlanas, J. M. Bestenlehner, A. Bobrick, D. M. Bowman, N. Britavskiy, P. A. Crowther, K. Deshmukh, M. Fabry, M. Gieles, A. Gilkis, G. González i Torà, G. Gräfener, M. Gull, Y. Götberg, C. Hawcroft, V. Hénault-Brunet, A. Herrero, G. Holgado, R. G. Izzard, S. Janssens, H. Jin, V. M. Kalari, Z. Katabi, A. de Koter, J. Klencki, B. Kubátová, J. Kubát, N. Langer, T. Lechien, D. Lennon, R. Lefever, B. Ludwig, L. Mahy, J. Maíz Apellániz, I. Mandel, A. Mang Román, G. Maravelias, P. Marchant, A. Menon, F. Najarro, A. O'Grady, L. Oskinova, R. Ovadia, L. R. Patrick, D. Pauli, M. Pawlak, M. Bernini Peron, A. Picco, V. Ramachandran, M. Renzo, D. F. Rocha, H. Sana, A. A. C. Sander, T. Sayada, A. Schootemeijer, F. R. N. Schneider, R. Seeburger, K. Sen, S. Shahaf, S. Simón-Díaz, M. Stoop, S. Toonen, F. Tramper, R. Valli, P. Van Daele, J. Th. van Loon, L. van Son, A. Vigna-Gómez, J. I. Villaseñor, J. S. Vink, C. Wang, X. -T. Xu

首次发表 2026-07-31

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中文总结 AI 辅助

该研究针对低金属丰度大质量恒星多重性约束不足的问题，通过BLOeM项目早期光谱监测，发现主序星双星占比超70%，为后续推导低金属丰度恒星初始质量函数奠定基础。

中文摘要 AI 辅助

低金属丰度（Z）的大质量恒星在塑造高红移宇宙中发挥核心作用，但其多重性仍未得到很好的约束。Binarity at Low Metallicity（BLOeM）项目是一项为期两年的调查，使用欧洲南方天文台甚大望远镜的纤维大阵列多元素光谱仪（FLAMES）对小麦哲伦星系中的929颗恒星进行观测，首次对低Z（1/5太阳金属丰度）大质量恒星开展大规模光谱监测。对初始9个 epoch 的分析显示，主序星的固有双星比例很高（>70%），演化天体的比例则急剧下降。对完整数据集的分析将得出轨道解、识别黑洞伴星，并推导低Z下单星和双星的初始质量函数。

英文摘要

Massive stars at low metallicity (Z) play a central role in shaping the high-redshift Universe, yet their multiplicity remains poorly constrained. The Binarity at Low Metallicity (BLOeM) campaign is a two-year survey of 929 stars in the Small Magellanic Cloud with the Fibre Large Array Multi Element Spectrograph (FLAMES) instrument at ESO's Very Large Telescope, providing the first large-scale spectroscopic monitoring of massive stars at low Z (1/5 solar). Analysis of the initial nine epochs reveals high intrinsic binary fractions (>70%) on the main sequence and a steep decline in evolved objects. Analysis of the full dataset will yield orbital solutions, identify black-hole companions, and allow a derivation of the initial mass function for single and binary stars at low Z.

补充信息

备注: 5 pages, 3 figures; published in The Messenger (ESO)
发表信息: The Messenger (ESO), Vol. 196, pp. 15-19 (2026)
DOI: 10.18727/0722-6691/5417