The interstellar extinction law is important for interpreting observations and inferring the properties of interstellar dust grains. Based on the 993 prism/CLEAR spectra from the James Webb Space Telescope (JWST), we investigate $0.6-5.3\,{\rm μm}$ interstellar dust extinction law. We propose a pair method to obtain the reddening curves based only on JWST observed spectra. Most of the high extinction sources are toward the young star cluster Westerlund 2. The infrared (IR) $1.0-5.3\,{\rm μm}$ reddening curves agree with the power-law $A_λ\propto λ^{-α}$ well. We determine an average value of $α=1.98\pm0.15$, which is consistent with the average value of the Galaxy. We find that $α$ may be variable and independent of $R_{\rm V}$. With the derived $α$, we convert the reddening curves into the extinction curves and establish the non-parameterized $α$-dependent extinction curves in the wavelength range of $0.6-5.3\,{\rm μm}$. At $λ<1\,{\rm μm}$, the derived extinction law is not well described by the parameterized power-law type curve. Our non-parameterized $α$-dependent extinction curves are suitable for the extinction correction of JWST-based photometry and spectra measurements at $0.6-5.3\,{\rm μm}$. We also provide the extinction coefficients for the JWST NIRCam bandpasses with different $α$.
EWOCS-IX: JWST/NIRCam observations of Westerlund 2 - Identification of candidate substellar members
Istituto Nazionale di Astrofisica (INAF) - Osservatorio Astronomico di Palermo(意大利国家天体物理研究所(INAF)- 巴勒莫天文台);Instituto de Astrofísica e Ciências do Espaço, Faculdade de Ciências, Universidade de Lisboa(里斯本大学科学学院空间科学与天体物理研究所);SUPA, School of Physics & Astronomy, University of St Andrews(圣安德鲁斯大学物理与天文学学院);European Southern Observatory(欧洲南方天文台);The University of Texas at Austin, Department of Astronomy(德克萨斯大学奥斯汀分校天文学系);Space Telescope Science Institute(太空望远镜科学研究所);Department of Astronomy, University of Florida(佛罗里达大学天文学系)
Accretion onto the Embedded Protostar L1527 IRS: Insights from JWST NIRSpec and MIRI Observations
University of Virginia(弗吉尼亚大学);National Radio Astronomy Observatory(国家射电天文台);University of Illinois(伊利诺伊大学);University of Toledo(托莱多大学);Leiden Observatory, Universiteit Leiden(莱顿天文台,莱顿大学);Max-Planck Institut für Extraterrestrische Physik(马克斯·普朗克地外物理研究所);Institut de Ciències de l’Espai (ICE-CSIC)(空间科学研究所(西班牙高等科学研究委员会));Institut d’Estudis Espacials de Catalunya (IEEC)(加泰罗尼亚空间研究学院);California Institute of Technology(加州理工学院)
TDCOSMO XXIV. First spatially resolved kinematics of the lens galaxy obtained using JWST-NIRSpec to improve time-delay cosmography
Kavli Institute for Cosmological Physics, University of Chicago(芝加哥大学卡弗里宇宙物理学研究所);Center for Astronomy, Space Science and Astrophysics, Independent University, Bangladesh(孟加拉独立大学天文学、空间科学与天体物理中心);Department of Physics and Astronomy, University of California, Los Angeles(加州大学洛杉矶分校物理与天文系);Technical University of Munich, TUM School of Natural Sciences, Physics Department(慕尼黑工业大学自然科学院物理系);Max Planck Institute for Astrophysics(马克斯·普朗克天体物理学研究所);Space Telescope Science Institute(太空望远镜科学研究所);Sub-Department of Astrophysics, Department of Physics, University of Oxford(牛津大学物理系天体物理子部门)
Simulating and interpreting deep observations in the Hubble Ultra Deep Field with the JWST/NIRSpec low-resolution 'prism'
詹姆斯·韦伯太空望远镜(JWST)将能够探测星系中的光发射线,其亮度范围很广,红移z>10。通过这些观测,对星系的关键特性(如恒星形成率和金属丰度)的测量将提供独特的见解,例如,来自恒星和活动星系核(AGN)的反馈在调节星系演化中的作用,AGN和宿主星系的共同演化,恒星形成星系的“主序列”的物理起源以及恒星形成星系对宇宙再电离的贡献。我们提出了一个原始的框架来模拟和分析观测与近红外光谱仪(NIRSpec)上JWST。我们使用的BEAGLE工具(贝叶斯分析的GalerosEds)建立一个半经验的星系光谱目录的基础上的光度光谱能量分布(SED)的辍学星系在哈勃超深场(HUDF)。我们证明,由此产生的星系光谱目录满足不同类型的高红移星系的观测约束,并使用它作为输入,以模拟NIRSpec/棱镜(R~100)的观测。我们发现,一个单一的“深”(~100 ks)的近红外光谱/棱镜指向HUDF将使S/N>3检测的多个光学发射线在~30(~60)星系在z>6(z~4-6)下降到m_F160 W <30 AB MAG。这样的观测将允许测量星系恒星形成率,电离参数和气相金属丰度的1.5倍,质光比在2倍之内,星系年龄在3倍之内,V波段衰减光学深度的精度为0.3。
Breaking Through the Cosmic Fog: JWST/NIRSpec Constraints on Ionizing Photon Escape in Reionization-Era Galaxies
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);Cosmic Dawn Center (DAWN)(宇宙黎明中心(DAWN));Max Planck Institut für Astrophysik(马克斯·普朗克天体物理研究所);Max-Planck-Institut für Astronomie(马克斯·普朗克天文学研究所);The University of Texas at Austin(德克萨斯大学奥斯汀分校)
Source--Line Associations in JWST/NIRSpec Dense-Shutter Spectroscopy
Kavli Institute for Cosmology, University of Cambridge(剑桥大学卡弗里宇宙学研究所);Cavendish Laboratory, University of Cambridge(剑桥大学卡文迪许实验室);Department for Astrophysical and Planetary Science, University of Colorado, Boulder(科罗拉多大学博尔德分校天文与行星科学系);Department of Physics, University of Oxford(牛津大学物理系);Steward Observatory, University of Arizona(亚利桑那大学斯图尔德天文台);Department of Astronomy, The University of Texas at Austin(德克萨斯大学奥斯汀分校天文学系);Cosmic Frontier Center, The University of Texas at Austin(德克萨斯大学奥斯汀分校前沿宇宙中心);Department of Astronomy and Astrophysics, University of California, Santa Cruz(加州大学圣克鲁兹分校天文与天体物理学系)
The BoRG-$JWST$ Survey: Abundance and Mass-to-light Ratio of Luminous $z=7-9$ Galaxies from Independent Sight Lines with NIRSpec
University of California, Los Angeles(加州大学洛杉矶分校);The University of Texas at Austin(德克萨斯大学奥斯汀分校);University of Geneva(日内瓦大学);California Institute of Technology(加州理工学院);National Astronomical Research Institute of Thailand (NARIT)(泰国国家天文研究所);Niels Bohr Institute, University of Copenhagen(哥本哈根大学尼尔斯·玻尔研究所);Max Planck Institut für Astronomie(马克斯·普朗克天体物理研究所);University of Melbourne(墨尔本大学)
Direct T_e-based Metallicities of z=2-9 Galaxies with JWST/NIRSpec: Empirical Metallicity Calibrations Applicable from Reionization to Cosmic Noon
University of Kentucky(肯塔基大学);University of California, Davis(加州大学戴维斯分校);University of California, Los Angeles(加州大学洛杉矶分校);University of Arizona(亚利桑那大学);University of California, Riverside(加州大学河滨分校);Cosmic Dawn Center (DAWN)(宇宙黎明中心);Niels Bohr Institute, University of Copenhagen(哥本哈根大学尼尔斯·玻尔研究所)
The Supermassive Black Hole in the Nearby Spiral Galaxy M81: A Robust Mass from JWST/NIRSpec Stellar Dynamics
University of Michigan(密歇根大学);Vietnam National University – Ho Chi Minh City(越南国立大学胡志明市);University of Oxford(牛津大学);International University, Vietnam National University in Ho Chi Minh City(越南国立大学胡志明市国际大学)
Metal-poor Brown Dwarf Kinematics from JWST NIRSpec Spectroscopy
Northwestern University(西北大学);University of California San Diego(加州大学圣迭戈分校);United States Naval Observatory, Flagstaff Station(美国海军天文台弗拉格斯塔夫站);Stanford University(斯坦福大学);NSF National Optical-Infrared Astronomy Research Laboratory(美国国家光学-红外天文研究实验室);Radcliffe Institute for Advanced Study at Harvard University(哈佛大学拉德克利夫高等研究院);Planétarium de Montréal, Espace pour la Vie(蒙特利尔天文馆,生命空间)
Measuring the Central Dark Mass in NGC 4258 with JWST/NIRSpec Stellar Kinematics
University of Michigan(密歇根大学);University of Science, Vietnam National University in Ho Chi Minh City(越南国立大学胡志明市自然科学大学);University of Oxford(牛津大学);International University, Vietnam National University in Ho Chi Minh City(越南国立大学胡志明市国际大学);International Centre for Interdisciplinary Science and Education(跨学科科学与教育中心)
The AURORA Survey: Tracing Galactic Outflows at $z\gtrsim2.5$ with JWST/NIRSpec NUV Absorption Lines
University of California, Los Angeles(加州大学洛杉矶分校);University of Kentucky(肯塔基大学);University of California, Riverside(加州大学河滨分校);University of Edinburgh(爱丁堡大学);University College London(伦敦大学学院);University of California Davis(加州大学戴维斯分校);Rochester Institute of Technology(罗切斯特理工学院);University of Florida(佛罗里达大学);University of Geneva(日内瓦大学)
The JWST Ultramassive Galaxy Sample -- II. Supermassive Black Hole Masses for 8 Extreme Early-Type Galaxies via Jeans Anisotropic Modelling of High-Resolution Integral-Field NIRSpec Stellar Kinematics
University of Oxford(牛津大学);University of Michigan(密歇根大学);Space Telescope Science Institute(太空望远镜科学研究所)
本研究利用 JAM 建模 JWST 高分辨率 NIRSpec 恒星运动学,测量 8 个超大质量星系的中心黑洞质量,发现其增长具有高度随机性,并填补了极端质量标度关系的空白。
MOCSS: Multi-Object Coronagraphy for JWST/NIRSpec Slitless Spectroscopy
University of Minnesota(明尼苏达大学);Stockholm University(斯德哥尔摩大学);Space Telescope Science Institute(太空望远镜科学研究所);University of Texas at Austin(德克萨斯大学奥斯汀分校);University of Modena & Reggio Emilia(摩德纳与雷焦艾米利亚大学);University College London(伦敦大学学院);Williams College(威廉姆斯学院)
Spatial decomposition of Little Red Dots with JWST/NIRSpec IFU into broad-line red cores and narrow-line blue host galaxies
Massachusetts Institute of Technology(麻省理工学院);University of Hawai‘i(夏威夷大学);Institute of Science and Technology Austria (ISTA)(奥地利科学技术研究所);North Carolina State University(北卡罗来纳州立大学);The University of Texas at Austin(德克萨斯大学奥斯汀分校);Princeton University(普林斯顿大学)
JADES NIRSpec Initial Data Release for the Hubble Ultra Deep Field: Redshifts and Line Fluxes of Distant Galaxies from the Deepest JWST Cycle 1 NIRSpec Multi-Object Spectroscopy
A Single Line-Emitter Identified in an Unbiased Search with JWST/NIRSpec: Multi-Object Coronagraphy for Slitless Spectroscopy
University of Minnesota(明尼苏达大学);Stockholm University(斯德哥尔摩大学);Space Telescope Science Institute(太空望远镜科学研究所);University of Texas at Austin(德克萨斯大学奥斯汀分校);University of Modena & Reggio Emilia(摩德纳与雷焦艾米利亚大学);University College London(伦敦大学学院);Williams College(威廉姆斯学院)
Blowing Star Formation Away in AGN Hosts (BAH) -- III. Serendipitous discovery of a $z\sim2.9$ star-forming galaxy lensed by the galactic bulge of CGCG 012-070 using JWST NIRSpec
First results from the JWST Early Release Science Program Q3D: Turbulent times in the life of a $z \sim 3$ extremely red quasar revealed by NIRSpec IFU
极红类星体,其热光度超过$10^{47}$ erg s $^{-1}$,是一个迷人的高红移群体,在本地宇宙中不存在。它们是超大质量黑洞以爱丁顿极限或以上的速率吸积的最佳候选者,并且它们与迄今为止已知的最快速和最强大的电离气体流出有关。它们也是大质量星系的宿主。在这里,我们提出了第一个积分场单位(IFU)的观测高红移类星体的近红外光谱仪(NIRSpec)上的詹姆斯韦伯太空望远镜(JWST),目标SDSSJ 165202.64 +172852.3,一个非常红的类星体在$z=2.94$。JWST观测揭示了扩展的电离气体-如[OIII] $λ$ 5007所追踪的-在类星体的宿主星系,其流出物和环星系介质中。复杂的形态学和运动学意味着类星体居住在一个非常密集的环境中,在10-15 kpc的投影距离内有几个相互作用的同伴星系。环境的高密度和伴随星系的大速度表明,这个系统可能代表了一个正在形成的星系团的核心。该系统是两个或多个暗物质晕合并的良好候选者,每个暗物质晕的质量为几个$10^{13}$ M $_\odot$,并可能追踪到$z\sim3$处的一个暗物质结。
Probing Direct Contributions of Galaxies and AGN to Cosmic Reionization in a Quasar Field J0226+0302 with JWST NIRCam and NIRSpec
University of Michigan(密歇根大学);Steward Observatory, University of Arizona(亚利桑那大学斯图尔德天文台);Cosmic Dawn Center (DAWN), Niels Bohr Institute, University of Copenhagen(哥本哈根大学尼尔斯·玻尔研究所黎明中心);Kavli IPMU (WPI), UTIAS, The University of Tokyo(东京大学宇宙起源研究核心理论研究中心);Center for Data-Driven Discovery, Kavli IPMU (WPI), UTIAS, The University of Tokyo(东京大学宇宙起源研究核心理论中心数据驱动发现中心);Department of Physics & Astronomy, University of California, Riverside(加州大学河滨分校物理与天文学系)
Early Results from GLASS-JWST. XXV. Electron Density in the Interstellar Medium at $0.7\lesssim z\lesssim 9.3$ with NIRSpec High-resolution Spectroscopy