论文标题
部分可观测时空混沌系统的无模型预测
High Resolution HST Imaging Survey of Local Star-Forming Galaxies I: Spatially-Resolved Obscured Star Formation with H$α$ and Paschen-$β$ Recombination Lines
论文作者
论文摘要
我们提供了一个样品，这些样本是从哈勃太空望远镜的宽和窄带光度法观察到的24个局部恒星形成的星系，这是对局部发光和超光红外星系的目标调查的一部分。由于发射管线周围的窄带过滤器H $α$（和[NII]）和PA $β$，我们获得了对每个星系中气体影响的灰尘衰减的可靠估计，与光学balmer降低H $α$/H $β$可以追溯到衰减更高，仅通过$> 1 $ $ $ $ $ $ $ $ 1 $ $ <$α$/h $β$。我们还通过空间分辨的SED拟合程序来推断恒星对恒星的尘埃衰减，该过程使用所有可用的HST成像过滤器。我们使用各种指标来获得每个空间箱的星形形成率（SFR），并发现Pa $β$ traces trace trace trace star形成区域，其中H $α$和光学恒星连续体被严重遮盖。灰尘校正的PA $β$ SFR恢复了24 $ $ M-M-terred SFR，其比例为$ -0.14 \ PM0.32 $ DEX，并从$ 8 \ Mathrm { - } 1000 \，μ\ Mathrm {M} $ infrared Luminusity以$ -0.0.0.04.04的$ -0.04 $ 0.233的$ 8 \ mathrm { - } 1000 \，μ\ Mathrm { - } 1000 \。无论是在空间分辨的和集成的意义上，近红外重组线的休息框架都可以在宇宙时间范围内描绘出恒星形成的更全面的画面，尤其是在最早在抗抗离子时期的星系中，即将在星系中对Paschen系列线排放的观察。
We present a sample of 24 local star-forming galaxies observed with broad- and narrow-band photometry from the Hubble Space Telescope, that are part of the GOALS survey of local luminous and ultra-luminous infrared galaxies. With narrow-band filters around the emission lines H$α$ (and [NII]) and Pa$β$, we obtain robust estimates of the dust attenuation affecting the gas in each galaxy, probing higher attenuation than can be traced by the optical Balmer decrement H$α$/H$β$ alone by a factor of $>1$ mag. We also infer the dust attenuation towards the stars via a spatially-resolved SED-fitting procedure that uses all available HST imaging filters. We use various indicators to obtain the star formation rate (SFR) per spatial bin, and find that Pa$β$ traces star-forming regions where the H$α$ and the optical stellar continuum are heavily obscured. The dust-corrected Pa$β$ SFR recovers the 24$μ$m-inferred SFR with a ratio $-0.14\pm0.32$ dex and the SFR inferred from the $8\mathrm{-}1000\,μ\mathrm{m}$ infrared luminosity at $-0.04\pm0.23$ dex. Both in a spatially-resolved and integrated sense, rest-frame near infrared recombination lines can paint a more comprehensive picture of star formation across cosmic time, particularly with upcoming JWST observations of Paschen-series line emission in galaxies as early as the epoch of reionization.
