论文标题
Z = 5.7倍增的Starburst SPT0346-52中的多相ISM
Multi-Phase ISM in the z = 5.7 Hyperluminous Starburst SPT0346-52
论文作者
论文摘要
SPT0346-52（Z = 5.7）是South Pole望远镜发现的最强烈的星形星系，其sigma_sfr〜4200 msol yr yr^-1 kpc^-2。在本文中，我们使用尘埃连续体的ALMA观察，[NII] 205微米，[CII] 158微米，[OI] 146微米和未检测到的[NII] 122 micron和[OI] 63微米发射以研究多型型固定层ISMMM MID（ISMM MID）。我们使用像素化的，基于可见性的镜头建模来重建源平面发射。我们还使用光电离心代码的云层对源平面排放进行建模，并找到一个超级金属性系统。我们计算t_dust = 48.3 k和lambda_peak = 80微米，并在所有五行中查看线路缺陷。离子气体比可比的星系密度不高，N_E <32 cm^-3，而[CII] 158发射的约20％来自ISM的电离阶段。我们还计算了ISM几个阶段的质量。我们发现，分子气体在SPT0346-52中主导ISM的质量，其分子气体质量比中性原子气质量高约4倍，比离子化气体质量高约100倍。
SPT0346-52 (z=5.7) is the most intensely star-forming galaxy discovered by the South Pole Telescope, with Sigma_SFR ~ 4200 Msol yr^-1 kpc^-2. In this paper, we expand on previous spatially-resolved studies, using ALMA observations of dust continuum, [NII]205 micron, [CII]158 micron, [OI]146 micron, and undetected [NII]122 micron and [OI]63 micron emission to study the multi-phase interstellar medium (ISM) in SPT0346-52. We use pixelated, visibility-based lens modeling to reconstruct the source-plane emission. We also model the source-plane emission using the photoionization code CLOUDY and find a supersolar metallicity system. We calculate T_dust = 48.3 K and lambda_peak = 80 micron, and see line deficits in all five lines. The ionized gas is less dense than comparable galaxies, with n_e < 32 cm^-3, while ~20% of the [CII]158 emission originates from the ionized phase of the ISM. We also calculate the masses of several phases of the ISM. We find that molecular gas dominates the mass of the ISM in SPT0346-52, with the molecular gas mass ~4x higher than the neutral atomic gas mass and ~100x higher than the ionized gas mass.
