低红移Lyman Continuum调查I：新的，多样化的本地Lyman-Continuum发射器

论文标题

低红移Lyman Continuum调查I：新的，多样化的本地Lyman-Continuum发射器

The Low-Redshift Lyman Continuum Survey I: New, Diverse Local Lyman-Continuum Emitters

论文作者

Flury, Sophia R., Jaskot, Anne E., Ferguson, Harry C., Worseck, Gabor, Makan, Kirill, Chisholm, John, Saldana-Lopez, Alberto, Schaerer, Daniel, McCandless, Stephan, Wang, Bingjie, Ford, N. M., Heckman, Timothy, Ji, Zhiyuan, Giavalisco, Mauro, Amorin, Ricardo, Atek, Hakim, Blaizot, Jeremy, Borthakur, Sanchayeeta, Carr, Cody, Castellano, Marco, Cristiani, Stefano, de Barros, Stephane, Dickinson, Mark, Finkelstein, Steven L., Fleming, Brian, Fontanot, Fabio, Garel, Thibault, Grazian, Andrea, Hayes, Matthew, Henry, Alaina, Mauerhofer, Valentin, Micheva, Genoveva, Oey, M. S., Ostlin, Goran, Papovich, Casey, Pentericci, Laura, Ravindranath, Swara, Rosdahl, Joakim, Rutkowski, Michael, Santini, Paola, Scarlata, Claudia, Teplitz, Harry, Thuan, Trinh, Trebitsch, Maxime, Vanzella, Eros, Verhamme, Anne, Xu, Xinfeng

论文摘要

负责宇宙电离的Lyman Continuum（Lyc）光子的起源尚未为且竞争激烈。由于播层间培养基吸收的吸收，无法从回离时期检测LYC光子，这促使了几种间接诊断的发展，以推断出星系促进LYC光子以通过研究下降低换档类似物来恢复宇宙的速率。我们介绍了低红移LYMAN Continuum Remage（LZLCS），其中包括用HST/COS进行Z = 0.2-0.4 66个星系样本的测量值。经过仔细处理FUV光谱后，我们获得了以97.725％置信度检测到的35个Lyman Continuum发射器（LCE），几乎是已知局部LCE的数量。我们估计未检测到的LYC通量上检测到的LYC通量和上限的逃生部分，发现一系列LYC逃生部分高达50％。在35个LZLCS LCES中，有12个LYC逃逸部分大于5％，使具有宇宙学相关的LYC逃生的已知局部LCE数量增加了一倍以上。

The origins of Lyman continuum (LyC) photons responsible for the reionization of the universe are as of yet unknown and highly contested. Detecting LyC photons from the epoch of reionization is not possible due to absorption by the intergalactic medium, which has prompted the development of several indirect diagnostics to infer the rate at which galaxies contribute LyC photons to reionize the universe by studying lower-redshift analogs. We present the Low-redshift Lyman Continuum Survey (LzLCS) comprising measurements made with HST/COS for a z=0.2-0.4 sample of 66 galaxies. After careful processing of the FUV spectra, we obtain a total of 35 Lyman continuum emitters (LCEs) detected with 97.725% confidence, nearly tripling the number of known local LCEs. We estimate escape fractions from the detected LyC flux and upper limits on the undetected LyC flux, finding a range of LyC escape fractions up to 50%. Of the 35 LzLCS LCEs, 12 have LyC escape fractions greater than 5%, more than doubling the number of known local LCEs with cosmologically relevant LyC escape.

下载PDF全文

下载文献需遵守相关版权规定

论文标题