Information content of JWST-NIRSPEC transmission spectra of warm Neptunes
Andrea Guzmán-Mesa, Daniel Kitzmann, Chloe Fisher, Adam J. Burgasser, H. Jens Hoeijmakers, Pablo Márquez-Neila, Simon L. Grimm, Avi M. Mandell, Raphael Sznitman, Kevin Heng
Warm Neptunes offer a rich opportunity for understanding exo-atmospheric chemistry. With the upcoming James Webb Space Telescope (JWST), there is a need to elucidate the balance between investments in telescope time versus scientific yield. We use the supervised machine learning method of the random forest to perform an information content analysis on a 11-parameter model of transmission spectra from the various NIRSpec modes. The three bluest medium-resolution NIRSpec modes (0.7 - 1.27 microns, 0.97 - 1.84 microns, 1.66 - 3.07 microns) are insensitive to the presence of CO. The reddest medium-resolution mode (2.87 - 5.10 microns) is sensitive to all of the molecules assumed in our model: CO, CO2, CH4, C2H2, H2O, HCN and NH3. It competes effectively with the three bluest modes on the information encoded on cloud abundance and particle size. It is also competitive with the low-resolution prism mode (0.6 - 5.3 microns) on the inference of every parameter except for the temperature and ammonia abundance. We recommend astronomers to use the reddest medium-resolution NIRSpec mode for studying the atmospheric chemistry of 800-1200 K warm Neptunes; its corresponding high-resolution counterpart offers diminishing returns. We compare our findings to previous JWST information content analyses that favor the blue orders, and suggest that the reliance on chemical equilibrium could lead to biased outcomes if this assumption does not apply. A simple, pressure-independent diagnostic for identifying chemical disequilibrium is proposed based on measuring the abundances of H2O, CO and CO2.
Atmospheric retrievals suggest the presence of a secondary atmosphere and possible sulfur species on L 98-59 d from JWST NIRSpec G395H transmission spectroscopy
JWST NIRSpec G395H Transmission Spectra of Two Similar Sub-Neptunes in the TOI-125 System
Johns Hopkins University（约翰斯·霍普金斯大学）；Space Telescope Science Institute（太空望远镜科学研究所）；University of Oxford（牛津大学）；Cavendish Laboratory, JJ Thomson Avenue, Cambridge CB3 0HE, UK（剑桥大学卡文迪许实验室）；University of California San Diego（加利福尼亚大学圣地亚哥分校）
Magma ocean interactions can explain JWST observations of the sub-Neptune TOI-270 d
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 Astronomy, University of Maryland（马里兰大学天文学系）；Space Telescope Science Institute（太空望远镜科学研究所）；Department of Astronomy & Astrophysics, University of Chicago（芝加哥大学天文学与天体物理学系）；Kapteyn Astronomical Institute, University of Groningen（格罗宁根大学卡普坦天文研究所）；Earth and Planets Laboratory, Carnegie Institution for Science（卡内基科学学会地球与行星实验室）
Cool, Cloudy Nights on an Ultrahot Neptune: A Panchromatic NIRISS/NIRSpec Transmission Spectrum of LTT 9779 b
University of New Mexico（新墨西哥大学）；Space Telescope Science Institute（太空望远镜科学研究所）；Johns Hopkins University Applied Physics Laboratory（约翰斯·霍普金斯大学应用物理实验室）；University of Kansas（堪萨斯大学）；University of Maryland（马里兰大学）；Universite Cote d’Azur（蔚蓝海岸大学）
JWST/NIRSpec Observations of Salacia-Actaea and Máni: Exploring Population-level Trends among Water-ice-rich Kuiper Belt Objects
Space Telescope Science Institute（太空望远镜科学研究所）；Southwest Research Institute（西南研究院）；Université Lyon 1（里昂第一大学）；Northern Arizona University（北亚利桑那大学）；Association of Universities for Research in Astronomy（天文研究大学协会）；NASA Goddard Space Flight Center（美国宇航局戈达德太空飞行中心）；Université Paris-Saclay（巴黎萨克雷大学）；University of Central Florida（中佛罗里达大学）；University of Oviedo（奥维耶多大学）
A JWST NIRSpec Phase Curve for WASP-121b: Dayside Emission Strongest Eastward of the Substellar Point and Nightside Conditions Conducive to Cloud Formation
JWST COMPASS: NIRSpec/G395H Transmission Observations of the Sub-Neptune HD 15337 c
Carnegie Institution for Science（卡内基科学研究所）；California Institute of Technology（加州理工学院）；University of California, Santa Cruz（加州大学圣克鲁兹分校）；Space Telescope Science Institute（太空望远镜科学研究所）；Cornell University（康奈尔大学）；NASA Ames Research Center（美国国家航空航天局艾姆斯研究中心）
JWST NIRSpec finds no clear signs of an atmosphere on TOI-1685 b
University of Oxford（牛津大学）；Space Telescope Science Institute（太空望远镜科学研究所）；University of Bern（伯尔尼大学）；Ludwig Maximilian University（慕尼黑大学）；ARTORG Center for Biomedical Engineering Research, University of Bern（伯尔尼大学ARTORG生物医学工程研究中心）；University College London（伦敦大学学院）；University of Warwick（华威大学）；Johns Hopkins University（约翰斯·霍普金斯大学）
The Polana-Eulalia Complex with JWST NIRSpec: Connections to Bennu, Ryugu, and Outer Solar System Bodies
Northern Arizona University（北亚利桑那大学）；Space Science Institute（太空科学研究所）；Instituto de Astrofísica de Canarias（加那利天体物理学研究所）；Universidad de La Laguna（拉古纳大学）；Observatório Nacional（国家天文台）；University of Central Florida（中佛罗里达大学）；Space Telescope Science Institute（空间望远镜科学研究所）；IPAC, Caltech（加州理工学院红外处理与分析中心）；Instituto de Ciencias y Tecnologías Espaciales de Asturias (ICTEA)（阿斯图里亚斯空间科学与技术研究所）；Universidad de Oviedo（奥维耶多大学）
JWST COMPASS: A NIRSpec G395H Transmission Spectrum of Radius Valley-Dweller TOI-260 b
Earth and Planets Laboratory, Carnegie Institution for Science（卡内基科学研究所地球与行星实验室）；Space Telescope Science Institute（太空望远镜科学研究所）；Department of Physics and Astronomy, University of New Mexico（新墨西哥大学物理与天文系）；The Observatories of the Carnegie Institution for Science（卡内基科学研究所天文台）；Eureka Scientific, Inc.（尤里卡科学公司）；NASA Ames Research Center（NASA艾姆斯研究中心）；School of Physics, University of Bristol（布里斯托尔大学物理学院）
Information content of JWST transmission spectroscopy of the exoplanet HAT-P-12b from the optical to the mid-infrared
KU Leuven（荷语鲁汶大学）；University of Edinburgh（爱丁堡大学）；SRON Space Research Organisation Netherlands（荷兰空间研究所）；Max-Planck-Institut für Astronomie (MPIA)（马克斯·普朗克天文学研究所）；Leiden University（莱顿大学）；University of Groningen（格罗宁根大学）；Radboud University（拉德堡德大学）；Université Paris-Saclay（巴黎萨克雷大学）；Université Paris Cité（巴黎西岱大学）
