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arXiv 2404.01435astro-ph.GA
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Haro 11：空间分辨的莱曼连续谱源

Haro 11: The Spatially Resolved Lyman Continuum Sources

Lena Komarova, M. S. Oey, Svea Hernandez, Angela Adamo, Mattia Sirressi, Claus Leitherer, J. M. Mas-Hesse, Goran Ostlin, Edmund Hodges-Kluck, Arjan Bik, Matthew… 展开作者

Lena Komarova, M. S. Oey, Svea Hernandez, Angela Adamo, Mattia Sirressi, Claus Leitherer, J. M. Mas-Hesse, Goran Ostlin, Edmund Hodges-Kluck, Arjan Bik, Matthew J. Hayes, Anne E. Jaskot, Daniel Kunth, Peter Laursen, Jens Melinder, T. Emil Rivera-Thorsen

备注：
22 pages, 5 figures. Accepted for publication in The Astrophysical Journal
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AI总结：

本文利用 HST/COS 对 Haro 11 三个恒星形成结进行空间分辨观测，发现 LyC 来自结 B 和 C，并揭示内禀电离光度、气体覆盖和 ULXs 对 LyC 逃逸的共同影响。

摘要：

作为距离最近的已确认莱曼连续谱（LyC）发射体，Haro 11 是研究对宇宙再电离至关重要的 LyC 逃逸过程的特殊实验室。我们对其三个恒星形成结的新 HST/COS G130M/1055 观测现在揭示，观测到的 LyC 起源于结 B 和结 C，其 $903 - 912~Å$ 光度分别为 $1.9\pm1.5 \times 10^{40}~\rm erg~s^{-1}$ 和 $0.9\pm0.7 \times 10^{40}~\rm erg~s^{-1}$。我们推导出结 B 和结 C 的局部逃逸分数分别为 $f_{\rm{esc, 912}} = 3.4\pm2.9\\%$ 和 $5.1\pm4.3\\%$。我们的 Starburst99 模型显示，每个结中的主导星族年龄约为 $\sim1-4$ Myr，质量为 $1-2\times10^7 \rm~M_\odot$，其中最年轻的星族位于结 B。因此，LyC 探测最强的结具有最高的 LyC 产生率。然而，由于更高的中性气体覆盖，结 B 中的 LyC 逃逸可能不如结 C 高效。因此，我们的结果强调了内禀电离光度而不仅仅是逃逸分数对 LyC 探测的重要性。类似地，Ly$α$ 逃逸分数与 LyC 通量并不一致相关，窄 Ly$α$ 红峰也不一致相关。然而，观测到的高 Ly$α$ 光度和低 Ly$α$ 峰速度分离确实与更高的 LyC 逃逸相关。另一个见解来自未被探测到的结 A，它驱动了 Haro 11 的 Green Pea 性质。其密度受限条件表明 LyC 逃逸具有高度各向异性。最后，两个泄漏 LyC 的结 B 和 C 都拥有超亮 X 射线源（ULXs）。虽然恒星在 LyC 发射中强烈主导于 ULXs，但这种有趣的巧合强调了揭示吸积体在 LyC 逃逸和再电离中的作用的重要性。

英文摘要：

As the nearest confirmed Lyman continuum (LyC) emitter, Haro 11 is an exceptional laboratory for studying LyC escape processes crucial to cosmic reionization. Our new HST/COS G130M/1055 observations of its three star-forming knots now reveal that the observed LyC originates in Knots B and C, with $903 - 912~Å$ luminosities of $1.9\pm1.5 \times 10^{40}~\rm erg~s^{-1}$ and $0.9\pm0.7 \times 10^{40}~\rm erg~s^{-1}$, respectively. We derive local escape fractions $f_{\rm{esc, 912}} = 3.4\pm2.9\%$ and $5.1\pm4.3\%$ for Knots B and C, respectively. Our Starburst99 modeling shows dominant populations on the order of $\sim1-4$ Myr and $1-2\times10^7 \rm~M_\odot$ in each knot, with the youngest population in Knot B. Thus, the knot with the strongest LyC detection has the highest LyC production. However, LyC escape is likely less efficient in Knot B than in Knot C due to higher neutral gas covering. Our results therefore stress the importance of the intrinsic ionizing luminosity, and not just the escape fraction, for LyC detection. Similarly, the Ly$α$ escape fraction does not consistently correlate with LyC flux, nor do narrow Ly$α$ red peaks. High observed Ly$α$ luminosity and low Ly$α$ peak velocity separation, however, do correlate with higher LyC escape. Another insight comes from the undetected Knot A, which drives the Green Pea properties of Haro 11. Its density-bounded conditions suggest highly anisotropic LyC escape. Finally, both of the LyC-leaking Knots, B and C, host ultra-luminous X-ray sources (ULXs). While stars strongly dominate over the ULXs in LyC emission, this intriguing coincidence underscores the importance of unveiling the role of accretors in LyC escape and reionization.

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。

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