论文标题
与Keck/nires的热尘埃星系中的快速流出
Fast Outflows in Hot Dust-Obscured Galaxies with Keck/NIRES
论文作者
论文摘要
我们在红移1.7-4.6的24个热粉尘的星系（热狗）带有凯克/nires的24个热尘埃的星系（热狗）中介绍了休息框的光谱观测。我们的目标是根据其极端红色选择的，是明智的红外调查中最高的亮度来源。在20个具有良好发射的来源中，我们适合密钥[O III]，H $β$，H $α$，[N II]和[S II]诊断线以限制身体状况。 Of the 17 targets with a clear detection of the [O III]$\rm λ$5007A emission line, 15 display broad blueshifted and asymmetric line profiles, with widths ranging from 1000 to 8000 $\rm km\ s^{-1}$ and blueshifts up to 3000 $\rm km\ s^{-1}$.这些运动学为大量离子流出的流出提供了高达$ 8000 \ \ rm m_ \ odot \ yr^{ - 1} $的大量证据，其中位数为$ 150 \ \ rm m_ \ odot \ odot \ odot \ yr^{ - 1} $。多达八个来源显示出与剧烈恒星形成一致的光学发射线比。 Balmer Line Star形态率，未校正为红色，范围从30--1300 $ \ rm m_ \ odot \ yr^{ - 1} $，中位数为$ 50 \ \ rm m_ \ odot \ odot \ yr^yr^{ - 1} $。从中和远红外光度法的SED拟合中的SFR估计表明值明显更高。我们估计中央黑洞的质量为$ 10^{8-10} \ rm \ m_ \ odot $，假设当前的$ \ rm m_ {bh} -cent _*$关系。这些星系中央黑洞的降压仪和估计的质量表明，许多以AGN为主导的热狗在其Eddington限制下积聚或以上。正在进行的恒星形成，大量流出和高爱丁顿比率的结合表明热狗是银河发展的过渡阶段。
We present rest-frame optical spectroscopic observations of 24 Hot Dust-Obscured Galaxies (Hot DOGs) at redshifts 1.7-4.6 with KECK/NIRES. Our targets are selected based on their extreme red colors to be the highest luminosity sources from the WISE infrared survey. In 20 sources with well-detected emission we fit the key [O III], H$β$, H$α$, [N II], and [S II] diagnostic lines to constrain physical conditions. Of the 17 targets with a clear detection of the [O III]$\rm λ$5007A emission line, 15 display broad blueshifted and asymmetric line profiles, with widths ranging from 1000 to 8000 $\rm km\ s^{-1}$ and blueshifts up to 3000 $\rm km\ s^{-1}$. These kinematics provide strong evidence for the presence of massive ionized outflows of up to $8000\ \rm M_\odot\ yr^{-1}$, with a median of $150\ \rm M_\odot\ yr^{-1}$. As many as eight sources show optical emission line ratios consistent with vigorous star formation. Balmer line star-formation rates, uncorrected for reddening, range from 30--1300 $\rm M_\odot\ yr^{-1}$, with a median of $50\ \rm M_\odot\ yr^{-1}$. Estimates of the SFR from SED fitting of mid and far-infrared photometry suggest significantly higher values. We estimate the central black hole masses to be of order $10^{8-10}\rm\ M_\odot$, assuming the present-day $\rm M_{BH}-σ_*$ relation. The bolometric luminosities and the estimated masses of the central black holes of these galaxies suggest that many of the AGN-dominated Hot DOGs are accreting at or above their Eddington limit. The combination of ongoing star formation, massive outflows, and high Eddington ratios suggest Hot DOGs are a transitional phase in galaxy evolution.
