CLEAR: Paschen-$β$ Star Formation Rates and Dust Attenuation of Low Redshift Galaxies
Nikko J. Cleri, Jonathan R. Trump, Bren E. Backhaus, Ivelina Momcheva, Casey Papovich, Raymond Simons, Benjamin Weiner, Vicente Estrada-Carpenter, Steven L. Fin… 展开作者
Nikko J. Cleri, Jonathan R. Trump, Bren E. Backhaus, Ivelina Momcheva, Casey Papovich, Raymond Simons, Benjamin Weiner, Vicente Estrada-Carpenter, Steven L. Finkelstein, Mauro Giavalisco, Zhiyuan Ji, Intae Jung, Jasleen Matharu, Felix Martinez, Megan R. Sturm
We use \Pab\ (1282~nm) observations from the Hubble Space Telescope ($\HST$) G141 grism to study the star-formation and dust attenuation properties of a sample of 29 low-redshift ($z < 0.287$) galaxies in the CANDELS Ly$α$ Emission at Reionization (CLEAR) survey. We first compare the nebular attenuation from $\Pab/\Ha$ with the stellar attenuation inferred from the spectral energy distribution, finding that the galaxies in our sample are consistent with an average ratio of the continuum attenuation to the nebular gas of 0.44, but with a large amount of excess scatter beyond the observational uncertainties. Much of this scatter is linked to a large variation between the nebular dust attenuation as measured by (space-based) $\Pab$ to (ground-based) $\Ha$ to that from (ground-based) $\Ha/\Hb$. This implies there are important differences between attenuation measured from grism-based / wide-aperture $\Pab$ fluxes and the ground-based / slit-measured Balmer decrement. We next compare star-formation rates (SFRs) from $\Pab$ to those from dust-corrected UV. We perform a survival analysis to infer a census of \Pab\ emission implied by both detections and non-detections. We find evidence that galaxies with lower stellar mass have more scatter in their ratio of \Pab\ to attenuation-corrected UV SFRs. When considering our \Pab\ detection limits, this observation supports the idea that lower mass galaxies experience "burstier" star-formation histories. Together, these results show that \Pab\ is a valuable tracer of a galaxy's SFR, probing different timescales of star-formation and potentially revealing star-formation that is otherwise missed by UV and optical tracers.
FRESCO: Constraining Dust Attenuation and Star-Formation Rates of $z\sim 2$ Star-Forming Galaxies with JWST Paschen and Ground-Based Balmer Emission Line Observations
University of California, Riverside(加州大学河滨分校);University of Geneva(日内瓦大学);Niels Bohr Institute, University of Copenhagen(哥本哈根大学尼尔斯·玻尔研究所);Institute of Science and Technology Austria (ISTA)(奥地利科学技术研究院);Yale University(耶鲁大学);Centro de Astrobiología (CAB), CSIC-INTA(天体生物学中心(CSIC-INTA));University of California, Los Angeles(加州大学洛杉矶分校)
The JWST/AURORA Survey: Multiple Balmer and Paschen Emission Lines for Individual Star-forming Galaxies at z=1.5-4.4. I. A Diversity of Nebular Attenuation Curves and Evidence for Non-Unity Dust Covering Fractions
University of California, Riverside(加州大学河滨分校);University of California, Los Angeles(加州大学洛杉矶分校);University of Kentucky(肯塔基大学);University of Arizona(亚利桑那大学);University College London(伦敦大学学院);Niels Bohr Institute, University of Copenhagen(哥本哈根大学尼尔斯·玻尔研究所);Cosmic Dawn Center (DAWN)(宇宙黎明中心);University of Edinburgh(爱丁堡大学);Max-Planck-Institut für extraterrestrische Physik (MPE)(马克斯·普朗克地外物理研究所)
The AURORA Survey: Multiple Balmer and Paschen Emission Lines for Individual Star-forming Galaxies at z=1.5-4.4. II. Implications for Nebular Dust Corrections, Nebular SFRs, and Differential Reddening
University of California, Riverside(加州大学河滨分校);University of California, Los Angeles(加州大学洛杉矶分校);University of California, Davis(加州大学戴维斯分校);University of Arizona(亚利桑那大学);Max-Planck-Institut für extraterrestrische Physik(马克斯·普朗克地外物理学研究所);California Institute of Technology(加州理工学院);University College London(伦敦大学学院)
High Resolution HST Imaging Survey of Local Star-Forming Galaxies I: Spatially-Resolved Obscured Star Formation with H$α$ and Paschen-$β$ Recombination Lines
Constructing a Hydrogen Line Library for Lyα Emitters at Low Redshifts (z < 0.4): Estimating Dust Extinction and Assessing Paschen line Detectability with SPHEREx
Chungnam National University(忠南国立大学);Kyungpook National University(庆北国立大学)
Mapping Dust Attenuation at Kiloparsec Scales. IV. A Dust-model Interpretation of Attenuation Curves in Nearby Galaxies
Tsinghua University(清华大学);INAF–Osservatorio Astronomico di Brera(意大利国家天体物理研究所布雷拉天文台);National Astronomical Observatories, Chinese Academy of Sciences(中国科学院国家天文台);The Chinese University of Hong Kong(香港中文大学)
Reproducing the UVJ Color Distribution of Star-forming Galaxies at 0.5 < z < 2.5 with a Geometric Model of Dust Attenuation
我们分析了0.5 < z < 2.5时恒星形成星系的静止坐标系U-V和V-J色的分布。使用恒星星族合成,随机恒星形成的历史,和一个简单的处方的尘埃衰减,占星系的形状和倾角,我们构建了一个模型的星系颜色的分布。只有两个自由参数,这个模型能够再现观测到的星系的颜色作为一个函数的红移和恒星质量非常好。我们的分析表明,在给定的红移和恒星质量下,恒星形成星系的尘埃衰减值范围很广,几乎完全是由于倾斜的影响;如果所有星系都被观察到,它们将显示出非常相似的尘埃衰减。这一结果具有重要意义的解释尘埃衰减测量,紫外和红外光度的治疗,数值模拟和观测之间的比较。
Comparing the Nebular and Stellar Dust Attenuation Curves in Nearby Star-Forming Galaxies
Korea Astronomy and Space Science Institute (KASI)(韩国天文与空间科学研究院);Department of Earth Science Education, Kyungpook National University(庆北国立大学地球科学教育系);Department of Astronomy and Space Science, Chungnam National University(忠南国立大学天文学与空间科学系);Astronomy Program, Department of Physics and Astronomy, Seoul National University(首尔国立大学物理天文学系天文学项目);SNU Astronomy Research Center, Seoul National University(首尔国立大学天文研究中心);Institute for Data Innovation in Science, Seoul National University(首尔国立大学数据创新科学研究院)
Simulations of Dust Content and Attenuation in $z=5-15$ Galaxies
University of Florida(佛罗里达大学);The University of Texas at Austin(德克萨斯大学奥斯汀分校);Niels Bohr Institute, University of Copenhagen(哥本哈根大学尼尔斯·玻尔研究所);University of California, Santa Barbara(加州大学圣塔芭芭拉分校);Harvard-Smithsonian Center for Astrophysics(哈佛-史密森天体物理中心)
The AURORA Survey: Ionizing Photon Production Efficiency with Minimal Nebular Dust Attenuation Systematics
University of California, Los Angeles(加州大学洛杉矶分校);University of California Riverside(加州大学河滨分校);University of Kentucky(肯塔基大学);University of Arizona(亚利桑那大学);The University of Texas at Austin(德克萨斯大学奥斯汀分校);NSF's National Optical-Infrared Astronomy Research Laboratory(美国国家光学-红外天文研究实验室);University of Edinburgh(爱丁堡大学);University College London(伦敦大学学院);Swinburne University of Technology(斯威本科技大学);University of Cambridge(剑桥大学);CNRS, IRAP(法国国家科学研究中心天体物理学研究所)
Variation of the Nebular Dust Attenuation Curve with the Properties of Local Star-forming Galaxies
我们利用SDSS DR 8巡天中位于$z\simeq 0.04-0.1$的$78,340$恒星形成星系样本,计算了星云尘埃的平均衰减曲线及其随星系物理性质的变化。利用前四条低阶巴耳末辐射线(H $α$,H $β$,H $γ$,H $δ$),得到了$0.41\,μ$ m ~ $0.66\,μ$ m范围内的星云衰减曲线,它与银河系消光曲线具有相似的形状和归一化(Milky Way curve)、最近导出的$z\sim2$典型成星星系的SMC曲线和星云衰减曲线。我们将星系划分成恒星质量,气相金属丰度和特定恒星形成率的箱,并推导出这些箱中的星云衰减曲线。这一分析表明,有非常小的变化,在形状的星云尘埃衰减曲线的属性用于bin的星系,并建议一个几乎普遍的形状的星云尘埃衰减曲线至少在星系和我们的样本中考虑的属性范围。
He II Emission from Wolf-Rayet Stars as a Tool for Measuring Dust Reddening
我们校准了一种测量恒星形成星系中尘埃衰减的技术。该技术利用沃尔夫-拉叶星的星风线,这是广泛观察到的星系光谱。He II 1640和4686的特征是复合线,其比例在很大程度上由原子物理学决定。因此,它们可以作为恒星尘埃探测器,就像巴耳末线被用作星云探测器一样。我们测量了银河系和大麦云云中97颗沃尔夫-拉叶星的He II 1640谱线强度。红化校正通量遵循紧密的相关性与固定的比率为7.76的He II 1640至4686线比。尘埃衰减降低了这个比率。我们提供了恒星E(B-V)和几个衰减规律的观测线比之间的关系。结合这种技术与使用的星云巴耳末衰减允许的恒星和星云尘埃衰减星系的测定,并可以探测其在不同的恒星年龄和质量制度的影响,独立于初始质量函数和恒星形成的历史。我们推导出尘埃红化的He II线通量,并将其与Balmer衰减和两个恒星形成星系中紫外线连续谱斜率的红化进行了比较。这三种方法产生的粉尘衰减在误差范围内一致。未来的应用,这种技术允许研究的恒星尘埃衰减相比,星云衰减在一个有代表性的星系样本。
Non-Parametric Attenuation Curves in Local Star-Forming Galaxies: Geometry Effect, Dust Evolution, and ISS
Institute for Astronomy, School of Physics, Zhejiang University(浙江大学物理学院天体物理研究所);Center for Cosmology and Computational Astrophysics, Zhejiang University(浙江大学宇宙学与计算天体物理中心);Purple Mountain Observatory(中国科学院紫金山天文台);Shanghai Astronomical Observatory, Chinese Academy of Sciences(中国科学院上海天文台);Key Lab for Astrophysics(天体物理重点实验室);School of Astronomy and Space Sciences, University of Chinese Academy of Sciences(中国科学院大学天文与空间科学学院);Sterrenkundig Observatorium, Universiteit Gent(根特大学天文台);College of Physics, Hebei Normal University(河北师范大学物理学院);Shijiazhuang Key Laboratory of Astronomy and Space Science / Guoshoujing Institute of Astronomy, Hebei Normal University(河北师范大学石家庄天文与空间科学重点实验室/郭守敬天文研究所);Hebei Key Laboratory of Photophysics Research and Application(河北省光物理研究与应用重点实验室)