In this letter we present the first systematic spectroscopic measurements of the Near-InfraRed (NIR) hydrogen recombination lines Paschen alpha ($Pa_α$ $λ= 1.875 μm$) and Brackett beta ($Br_β$ $λ= 2.626 μm$), produced by pre-main-sequence (PMS) stars. These stars, consisting of T Tauri and Herbig AeBe stars are located in the massive Galactic star-formation region NGC 3603. The measurements were obtained from JWST NIRSpec, using multi-object spectroscopy (MOS) mode. Utilising existing empirical relations between $L_{acc}$ and $L_{Br_γ}$, we have used our new measurements to formulate, for the first time, an empirical relationship between the accretion luminosity $L_{acc}$ of the stars, and the line luminosities $L_{line}$ of both $Pa_α$ and $Br_β$. These relationships are: $\log_{10}( \frac{L_{acc}}{L_{\odot}}) = 1.42 (\pm 0.18) \times \log_{10}( \frac{L_{Pa_α}}{L_{\odot}}) + 3.33 (\pm 0.42)$ and $\log_{10}( \frac{L_{acc}}{L_{\odot}}) = 1.47 (\pm 0.18) \times \log_{10}( \frac{L_{Br_β}}{L_{\odot}}) + 4.60 (\pm 0.57)$. These new relationships are key for roughly estimating the accretion rates for large samples of PMS stars with JWST.
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）
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）
High-precision atmospheric characterization of a Y dwarf with JWST NIRSpec G395H spectroscopy: isotopologue, C/O ratio, metallicity, and the abundances of six molecular species
JWST/NIRSpec Spectra for Three Ultracool Brown Dwarfs Detected in Extragalactic Surveys: Further Evidence for Phosphine Absorption
Steward Observatory, University of Arizona（亚利桑那大学斯图尔德天文台）；School of Physics, Trinity College Dublin, University of Dublin（都柏林大学三一学院物理系）；Department of Astronomy and Astrophysics, University of California, San Diego（加州大学圣地亚哥分校天体物理学与天文学系）；Monta Vista High School（蒙塔维塔高中）；The Department of Astronomy & Astrophysics, The Pennsylvania State University（宾夕法尼亚州立大学天体物理学与天文学系）；Department of Planetary Sciences, Lunar & Planetary Laboratory, University of Arizona（亚利桑那大学月球与行星实验室行星科学系）；School of Earth and Space Exploration, Arizona State University（亚利桑那州立大学地球与空间探索学院）；Department of Physics and Astronomy, University of Manitoba（曼尼托巴大学物理与天文学系）
JWST MEP - A World Under Spotty Starlight: Detection of CO2 and H2O in the Hot Saturn WASP-52b with JWST NIRSpec G395H
University of Virginia（弗吉尼亚大学）；University of Michigan（密歇根大学）；University of St Andrews（圣安德鲁斯大学）；Space Telescope Science Institute（太空望远镜科学研究所）；Johns Hopkins University（约翰斯·霍普金斯大学）；European Southern Observatory（欧洲南方天文台）
JWST Observations of SN 2024ggi II: NIRSpec Spectroscopy and CO Modeling at 285 and 385 Days Past the Explosion
Florida State University（佛罗里达州立大学）；University of Hawai’i at Manoa（夏威夷大学马诺阿分校）；Space Telescope Science Institute（太空望远镜科学研究所）；Carnegie Institution for Science（卡内基科学学会）；Planetary Science Institute（行星科学研究所）；Hamburger Sternwarte（汉堡天文台）；Las Campanas Observatory, Carnegie Observatories（卡内基天文台拉斯坎帕纳斯观测站）；Michigan State University（密歇根州立大学）
JWST/NIRSpec Detects Warm CO Emission in the Terrestrial-Planet Zone of HD 131488
Gemini Observatory/NSF’s NOIRLab（吉米尼天文台/美国国家光学红外天文实验室）；European Space Agency (ESA), European Space Astronomy Centre (ESAC)（欧洲空间局（ESA），欧洲空间天文中心（ESAC））；Clemson University（克莱姆森大学）；Space Telescope Science Institute（太空望远镜科学研究所）；Johns Hopkins University（约翰斯·霍普金斯大学）；NSF’s NOIRLab（美国国家科学基金会下属的国家光学红外天文实验室）；Trinity College Dublin, the University of Dublin（都柏林三一学院，都柏林大学）；University of Colorado Boulder（科罗拉多大学博尔德分校）；NASA Goddard Space Flight Center（美国宇航局戈达德太空飞行中心）
JWST/NIRSpec 发现 HD 131488 地球行星带中温暖 CO 气体，通过 UV 荧光检测稀薄气体，揭示了尘埃盘中新的气体存在。
The Dyn-Atmo Survey: JWST/NIRSpec spectroscopy of dynamical benchmark GJ 758 B
Space Telescope Science Institute（太空望远镜科学研究所）；European Space Agency (ESA)（欧洲空间局）；Amherst College（阿默斯特学院）；American Museum of Natural History（美国自然历史博物馆）；University of Texas at Austin（德克萨斯大学奥斯汀分校）；Smith College（史密斯学院）；Northwestern University（西北大学）
The JWST weather report from the nearest brown dwarfs II: Consistent variability mechanisms over 7 months revealed by 1-14 $μ$m NIRSpec + MIRI monitoring of WISE 1049AB
