论文标题
伟大的Lyman Continuum泄漏者的物理学
Physics of Prodigious Lyman Continuum Leakers
论文作者
论文摘要
对恒星形成事件的动力学进行分析。结果表明，能够在数百万年内驱动剩余气体到足够高度的星系具有两个基本特性：小尺寸（<1kpc）和高星形形成速率表面密度（Sigma_sfr> 10 msun/yr/yr/yr/kpc2）。对于相关性的参数空间，流出主要是由超新星驱动的，辐射压力显着但尺寸为尺寸。我们的分析为各种观察到的LYC泄漏者提供了统一的物理来源，包括绿色 - 帕斯星系，[SII] - 韦克星系，Lyman-Alpha发射器，并将这两个特征作为共同点。在LYC泄漏器的可验证的物理特性中，我们预测（1）新形成的恒星质量通常在1E8-1E10 MSUN的范围内，除了Ulirgs外，（2）流速速度通常在100-600km/s的范围内，但在ULIRGS中的出现通常超过1E3 km/s的质量，并且均超过1E3 km/s。速度，（3）星系的总体逃逸部分随着红移的增加而增加，因为宇宙学的趋势是星系趋于浓密，并且随着红移的增加而变得更加紧凑。此外，还出现了两个有趣的副产品预测。首先，乌里格（Ulirgs）似乎处于一个参数区域，除非有大型撞击，否则它们应该是巨大的LYC泄漏器。其次，鉴于他们声称的有效半径超过1kpc，Lyman破裂星系（LBGS）不应该是我们模型中杂乱无章的LYC泄漏者。
An analysis of the dynamics of a star formation event is performed. It is shown that galaxies able to drive leftover gas to sufficient altitudes in a few million years are characterized by two basic properties: small sizes (<1kpc) and high star formation rate surface densities (Sigma_SFR > 10 Msun/yr/kpc2). For the parameter space of relevance, the outflow is primarily driven by supernovae with radiation pressure being significant but subdominant. Our analysis provides the unifying physical origin for a diverse set of observed LyC leakers, including the green-peas galaxies, [SII]-weak galaxies, Lyman-alpha emitters, with these two characteristics as the common denominator. Among verifiable physical properties of LyC leakers, we predict that (1) the newly formed stellar masses are are typically in the range of 1e8-1e10 Msun, except perhaps ULIRGs, (2) the outflow velocities are typically in the range typically of 100-600km/s, but may exceed 1e3 km/s in ULIRGs, with a strong positive correlation between the stellar masses formed and the outflow velocities, (3) the overall escape fraction of galaxies is expected to increase with increasing redshift, given the cosmological trend that galaxies become denser and more compact with increasing redshift. In addition, two interesting by-product predictions are also borne out. First, ULIRGs appear to be in a parameter region where they should be prodigious LyC leakers, unless there is a large ram-pressure. Second, Lyman break galaxies (LBGs) are not supposed to be prodigious LyC leakers in our model, given their claimed effective radii exceeding 1kpc.
