论文标题
Lyman连续体逃脱了货物领域的星系和AGN的分数
The Lyman Continuum Escape Fraction of Galaxies and AGN in the GOODS Fields
论文作者
论文摘要
我们介绍了对LYC发射和逃生分数为111个光谱镜验证的星系，并在2.26美元<z <4.3 $中，有或没有AGN。我们从Smith等人那里扩展了ERS样本。 （2018; arxiv：1602.01555）使用WFC3/UVIS F225W，F275W和F336W MOSAICS，在北部和南部田野中有64个星系，我们使用HDUV，Candels和UVUDF数据独立淋上了Mosaics。在111个星系中的17个AGN中，一个在$ m_ {ab} = 23.19 $ mag（s/n $ \ simeq $ 133）和$ galex $ nuv at $ m_ {ab {ab} = 23.77 $ mag（s/n $ \ simeq $ 13）中提供了F275W的LYC检测。我们同时适合此AGN的$ SDS $和$ Chandra $ spectra of此AGN的光谱与积聚磁盘和Comptonization模型，并找到$ f_ {Esc} $值的$ f_ {Esc}^{eSc}^{f275w} \ simeq 28^{+20} {+20}} 30^{+22} _ { - 5} $％。对于剩下的110个星系，我们堆叠图像切口，这些切口使用F225W，F275W和F336W数据捕获其LYC排放量，并结合使用AGN和$ $ GALAXIES，以及带有AGN和所有$ $ agnaxies的星系的组合。我们发现17 AGN的堆栈从$ \ langle z \ rangle \ simeq 2.3-4.3 $中占据主导地位，而没有AGN的所有94个星系，$ \ sim $ 10 $ \ sim $ 10。虽然早期宇宙的IgM可能主要是由大型恒星恢复的，但有证据表明，电离能量的很大一部分来自AGN。
We present our analysis of the LyC emission and escape fraction of 111 spectroscopically verified galaxies with and without AGN from $2.26<z<4.3$. We extended our ERS sample from Smith et al. (2018; arXiv:1602.01555) with 64 galaxies in the GOODS North and South fields using WFC3/UVIS F225W, F275W, and F336W mosaics we independently drizzled using the HDUV, CANDELS, and UVUDF data. Among the 17 AGN from the 111 galaxies, one provided a LyC detection in F275W at $m_{AB}=23.19$ mag (S/N $\simeq$ 133) and $GALEX$ NUV at $m_{AB}=23.77$ mag (S/N $\simeq$ 13). We simultaneously fit $SDSS$ and $Chandra$ spectra of this AGN to an accretion disk and Comptonization model and find $f_{esc}$ values of $f_{esc}^{F275W}\simeq 28^{+20}_{-4}$% and $f_{esc}^{NUV}\simeq 30^{+22}_{-5}$%. For the remaining 110 galaxies, we stack image cutouts that capture their LyC emission using the F225W, F275W, and F336W data of the GOODS and ERS samples, and both combined, as well as subsamples of galaxies with and without AGN, and $all$ galaxies. We find the stack of 17 AGN dominate the LyC production from $\langle z\rangle\simeq 2.3-4.3$ by a factor of $\sim$10 compared to all 94 galaxies without AGN. While the IGM of the early universe may have been reionized mostly by massive stars, there is evidence that a significant portion of the ionizing energy came from AGN.
