论文标题
测试一种间接方法，用于识别高水平Lyman Continuum泄漏的星系
Testing an indirect method for identifying galaxies with high levels of Lyman continuum leakage
论文作者
论文摘要
在SSA22字段中，使用$ z \ 3 $的星系示例，在SSA22字段中检测到的Lyman Continuum（LYC）泄漏，我们尝试验证一种基于H $ epivalent width（eW $ epivalent width（ew $ epivalent）和$β$β$β$β$ efivalement $ equivalements $ f_ \ mathrm {ensrm {ensrm {ensrm {ensrm {ensrm {ensrm {ensrm {ensrm {ensrm {ensrm {ensrm {ensrm {ensrm {ensrm {esc} $）的案例的泄漏。为此，我们介绍Keck/Mosfire H $β$排放线路通量测量在光谱红移上Lyc星系（LCGS）的$ z _ {\ Mathrm {spec}} \ sim 3.3 $，Lyman Break break axecties（lbgs），photmote redshifts $ z _ { 2.7 $ - $ 3.7 $，以及$ z {\ mathrm {phot}}} = 3.1 $的Ly $α$发射器。我们还重新确认光谱红移并测量来自2个LCG和6 lbgs的H $β$发射线通量。对于我们的样本中的LCG，最极端的$ f_ \ mathrm {Esc} $，正如直接检测LYC光子所揭示的那样，我们发现eW（H $β$） - $β$方法给出了$ f_ \ mathrm {esc} $的广泛一致的估计，尽管错误条仍然很大。我们还讨论了基于直接和间接方法的$ f_ \ mathrm {Esc} $测量的组合如何阐明LYC逃生机制和泄漏的各向异性。
Using a sample of galaxies at $z\approx 3$ with detected Lyman Continuum (LyC) leakage in the SSA22 field, we attempt to verify a proposed indirect method for identifying cases with high LyC escape fraction $f_\mathrm{esc}$ based on measurements of the H$β$ equivalent width (EW) and the $β$ slope of the UV continuum. To this end, we present Keck/MOSFIRE H$β$ emission line flux measurements of LyC galaxies (LCGs) at spectroscopic redshifts $z_{\mathrm{spec}} \sim 3.3$, Lyman break galaxies (LBGs) at photometric redshifts $z_{\mathrm{phot}} = 2.7$--$3.7$, and Ly$α$ emitters at $z_{\mathrm{phot}} = 3.1$. We also reconfirm the spectroscopic redshifts and measure the H$β$ emission line fluxes from 2 LCGs and 6 LBGs. For the LCG in our sample with the most extreme $f_\mathrm{esc}$, as revealed by the direct detection of LyC photons, we find that the EW(H$β$)--$β$ method gives a broadly consistent estimate for $f_\mathrm{esc}$, although the error bars remain very large. We also discuss how a combination of $f_\mathrm{esc}$ measurements based on direct and indirect methods can shed light on the LyC escape mechanism and the anisotropy of the leakage.
