早期宇宙中一个富尘恒星形成星系的快速分子外流
星系天体物理
2018-09-12 v1
摘要
星系生长效率低下，每个自由落体时间仅有百分之几的可用气体转化为恒星。若反馈过程（如由辐射压、超新星或超大质量黑洞吸积驱动的外流风）加热或驱离气体供应，则可中止恒星形成。我们报道了在红移5.3、即大爆炸后十亿年从一个富尘恒星形成星系出发的分子外流。该外流相对于星系速度可达800 km/s，被分解为多个团块，并以在恒星形成率两倍以内的速率携带质量。我们的结果表明，分子外流能从高红移星系中移除可用作恒星形成的气体的大部分。
引用
@article{arxiv.1809.01676,
title = {Fast Molecular Outflow from a Dusty Star-Forming Galaxy in the Early Universe},
author = {J. S. Spilker and M. Aravena and M. Bethermin and S. C. Chapman and C. -C. Chen and D. J. M. Cunningham and C. De Breuck and C. Dong and A. H. Gonzalez and C. C. Hayward and Y. D. Hezaveh and K. C. Litke and J. Ma and M. Malkan and D. P. Marrone and T. B. Miller and W. R. Morningstar and D. Narayanan and K. A. Phadke and J. Sreevani and A. A. Stark and J. D. Vieira and A. Weiss},
journal= {arXiv preprint arXiv:1809.01676},
year = {2018}
}
备注
Author's version of paper to appear in Science on 7 September 2018