JWST COMPASS: The 3-5 Micron Transmission Spectrum of the Super-Earth L 98-59 c
Nicholas Scarsdale, Nicholas Wogan, Hannah R. Wakeford, Nicole L. Wallack, Natasha E. Batalha, Lili Alderson, Artyom Aguichine, Angie Wolfgang, Johanna Teske, S… 展开作者
Nicholas Scarsdale, Nicholas Wogan, Hannah R. Wakeford, Nicole L. Wallack, Natasha E. Batalha, Lili Alderson, Artyom Aguichine, Angie Wolfgang, Johanna Teske, Sarah E. Moran, Mercedes Lopez-Morales, James Kirk, Tyler Gordon, Peter Gao, Natalie M. Batalha, Munazza K. Alam, Jea Adams Redai
We present a JWST NIRSpec transmission spectrum of the super-Earth exoplanet L 98-59 c. This small (R$_p=1.385\pm0.085$R$_\oplus$, M$_p=2.22\pm0.26$R$_\oplus$), warm (T$_\textrm{eq}=553$K) planet resides in a multi-planet system around a nearby, bright (J = 7.933) M3V star. We find that the transmission spectrum of L 98-59 c is featureless at the precision of our data. We achieve precisions of 22ppm in NIRSpec G395H's NRS1 detector and 36ppm in the NRS2 detector at a resolution R$\sim$200 (30 pixel wide bins). At this level of precision, we are able rule out primordial H$_2$-He atmospheres across a range of cloud pressure levels up to at least $\sim$0.1mbar. By comparison to atmospheric forward models, we also rule out atmospheric metallicities below $\sim$300$\times$ solar at 3$σ$ (or equivalently, atmospheric mean molecular weights below $\sim$10~g/mol). We also rule out pure methane atmospheres. The remaining scenarios that are compatible with our data include a planet with no atmosphere at all, or higher mean-molecular weight atmospheres, such as CO$_2$- or H$_2$O-rich atmospheres. This study adds to a growing body of evidence suggesting that planets $\lesssim1.5$R$_\oplus$ lack extended atmospheres.
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 COMPASS Program: The 3--5$μ$m transmission spectrum of LTT 1445 A b
NASA Ames Research Center(美国国家航空航天局艾姆斯研究中心);Earth and Planets Laboratory, Carnegie Institution for Science(卡内基科学学会地球与行星实验室);University of California, Santa Cruz(加州大学圣克鲁兹分校);SETI Institute(搜寻地外文明研究所);Johns Hopkins University(约翰斯·霍普金斯大学);The Observatories of the Carnegie Institution for Science(卡内基科学学会天文台);Space Telescope Science Institute(太空望远镜科学研究所)
研究LTT 1445 A b大气的最接近岩石类M矮星,利用JWST NIRSpec/G395H在3-5μm范围内获得首个传输光谱,并通过两种数据处理方法得出高精度光谱深度测量,限制大气金属含量。
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)
JWST COMPASS: Insights into the Systematic Noise Properties of NIRSpec/G395H From a Uniform Reanalysis of Seven Transmission Spectra
University of California, Santa Cruz(加州大学圣克鲁兹分校);NASA Ames Research Center(美国国家航空航天局艾姆斯研究中心);Imperial College London(伦敦帝国理工学院);Space Telescope Science Institute(太空望远镜科学研究所);Center for Astrophysics, Harvard & Smithsonian(哈佛与史密森尼天体物理中心);Earth and Planets Laboratory, Carnegie Institution for Science(卡内基科学机构地球与行星实验室);The Observatories of the Carnegie Institution for Science(卡内基科学机构天文台)
The Flying Saucer edge-on disc's Near Infrared silhouette revealed by the JWST JEDIce program
Institut des Sciences Moléculaires d’Orsay, CNRS, Univ. Paris-Saclay(奥尔赛分子科学研究所,法国国家科学研究中心,巴黎萨克雷大学);Physique des Interactions Ioniques et Moléculaires, CNRS, Aix Marseille Université(离子与分子相互作用物理实验室,法国国家科学研究中心,艾克斯-马赛大学);Dept. Chemistry, University of California, Berkeley(加州大学伯克利分校化学系);Jet Propulsion Laboratory, California Institute of Technology(喷气推进实验室,加州理工学院);Astronomy Department, University of Virginia(弗吉尼亚大学天文系);Institute of Astronomy, Department of Physics, National Tsing Hua University(国立清华大学物理天体物理研究所);Leiden Observatory, Leiden University(莱顿大学莱顿天文台);Center for Astrophysics, Harvard & Smithsonian(哈佛史密森尼天体物理中心);Astrophysics & Space Institute, Schmidt Sciences(施密特科学天文与空间研究所);Physikalisch-Meteorologisches Observatorium Davos und Weltstrahlungszentrum(达沃斯物理气象观测站与世界辐射中心);Univ. Grenoble Alpes, CNRS, IPAG(格勒诺布尔阿尔卑斯大学,法国国家科学研究中心,IPAG研究所);Star and Planet Formation Laboratory(恒星与行星形成实验室)
First Demonstration of Kernel Phase Interferometry on JWST/MIRI: Prospects for Future Planet Searches Around Post Main Sequence Stars
University of California, Irvine(加州大学尔湾分校);University of California, Santa Cruz(加州大学圣克鲁兹分校);University of Texas at Austin(德克萨斯大学奥斯汀分校);University of Arizona(亚利桑那大学)
The Volatile Inventory of 3I/ATLAS as seen with JWST/MIRI
California Institute of Technology(加州理工学院);Space Telescope Science Institute(太空望远镜科学研究所);Eureka Scientific(尤里卡科学);Auburn University(奥本大学);Johns Hopkins University Applied Physics Laboratory(约翰斯·霍普金斯大学应用物理实验室)
JWST/MIRI Finds ISM-like Amorphous Silicates in Interstellar Comet 3I/ATLAS
California Institute of Technology(加州理工学院);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 California San Diego(加利福尼亚大学圣地亚哥分校);Eureka Scientific(尤里卡科学公司);Jet Propulsion Laboratory(喷气推进实验室)
Molecular mapping of an exoplanet with JWST: NH3 detection in the temperate super-Jupiter Epsilon Indi Ab
Institut de Recherche en Astrophysique et Planétologie(天体物理学与行星学研究所在);École polytechnique, Institut Polytechnique de Paris(巴黎综合理工学院,巴黎理工学院);Observatoire de Paris(巴黎天文台)
利用JWST红外光谱和交叉相关技术,对直接成像的温带超级木星Epsilon Indi Ab进行分子测绘,可靠探测到NH3、H2O、CH4,并边缘性探测到CO2,验证了该方法在强恒星污染下的有效性。
The dark and featureless surface of rocky exoplanet LHS 3844 b from JWST mid-infrared spectroscopy
Center for Astrophysics, Harvard & Smithsonian(哈佛-史密松天体物理中心);Max-Planck-Institut für Astronomie(马克斯·普朗克天文学研究所);University of Chicago(芝加哥大学);Jet Propulsion Laboratory, California Institute of Technology(加州理工学院喷气推进实验室);California Institute of Technology(加州理工学院);Peking University(北京大学);The Pennsylvania State University(宾夕法尼亚州立大学);NASA Goddard Space Flight Center(美国国家航空航天局戈达德太空飞行中心)
A Next-Generation Exoplanet Atmospheric Retrieval Framework NEXOTRANS for Emission Spectroscopy: New Constraints and Atmospheric Characterization of WASP-69b Using JWST NIRCam and MIRI Observations
Precise Constraints on the Energy Budget of WASP-121 b from its JWST NIRISS/SOSS Phase Curve
McGill University(麦吉尔大学);University of Michigan(密歇根大学);University of Waterloo(滑铁卢大学);University of Chicago(芝加哥大学);University of British Columbia(不列颠哥伦比亚大学);University of California, Los Angeles(加州大学洛杉矶分校);Johns Hopkins University(约翰斯·霍普金斯大学);University of Victoria(维多利亚大学);Cornell University(康奈尔大学);University of Oxford(牛津大学)
Piercing through the Haze: Characterizing Titan-like terrestrial exoplanets with JWST
Johns Hopkins Applied Physics Laboratory(约翰斯·霍普金斯大学应用物理实验室);University of Wyoming, School of Computing(怀俄明大学计算机学院);NASA Goddard Space Flight Center(美国宇航局戈达德太空飞行中心);NASA Ames Research Center(美国宇航局艾姆斯研究中心);Bay Area Environmental Research Institute(湾区环境研究所)
JWST Reveals Refractory-Rich Water Ice in Interstellar Comet 3I/ATLAS: Evidence for a Continuum of Grain Properties across Protoplanetary Disks
Southwest Research Institute(西南研究院);University of Maryland, College Park(马里兰大学帕克分校);NASA Goddard Space Flight Center(美国宇航局戈达德太空飞行中心);Catholic University of America(美利坚天主教大学);Auburn University(奥本大学);Universität Bern(伯尔尼大学)
The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems II: A 1 to 20 Micron Spectrum of the Planetary-Mass Companion VHS 1256-1257 b