Identification of carbon dioxide in an exoplanet atmosphere.
Identification of carbon dioxide in an exoplanet atmosphere.
复制标题
DOI：
10.1038/s41586-022-05269-w
复制
发表时间：
2023-03
期刊：
影响因子：
64.8
通讯作者：
Zieba, Sebastian
中科院分区：
文献类型：
--
作者：
Ahrer, Eva-Maria;Alderson, Lili;Batalha, Natalie M.;Batalha, Natasha E.;Bean, Jacob L.;Beatty, Thomas G.;Bell, Taylor J.;Benneke, Bjorn;Berta-Thompson, Zachory K.;Carter, Aarynn L.;Crossfield, Ian J. M.;Espinoza, Nestor;Feinstein, Adina D.;Fortney, Jonathan J.;Gibson, Neale P.;Goyal, Jayesh M.;Kempton, Eliza M-R;Kirk, James;Kreidberg, Laura;Lopez-Morales, Mercedes;Line, Michael R.;Lothringer, Joshua D.;Moran, Sarah E.;Mukherjee, Sagnick;Ohno, Kazumasa;Parmentier, Vivien;Piaulet, Caroline;Rustamkulov, Zafar;Schlawin, Everett;Sing, David K.;Stevenson, Kevin B.;Wakeford, Hannah R.;Allen, Natalie H.;Birkmann, Stephan M.;Brande, Jonathan;Crouzet, Nicolas;Cubillos, Patricio E.;Damiano, Mario;Desert, Jean-Michel;Gao, Peter;Harrington, Joseph;Hu, Renyu;Kendrew, Sarah;Knutson, Heather A.;Lagage, Pierre-Olivier;Leconte, Jeremy;Lendl, Monika;MacDonald, Ryan J.;May, E. M.;Miguel, Yamila;Molaverdikhani, Karan;Moses, Julianne, I;Murray, Catriona Anne;Nehring, Molly;Nikolov, Nikolay K.;de la Roche, D. J. M. Petit Dit;Radica, Michael;Roy, Pierre-Alexis;Stassun, Keivan G.;Taylor, Jake;Waalkes, William C.;Wachiraphan, Patcharapol;Welbanks, Luis;Wheatley, Peter J.;Aggarwal, Keshav;Alam, Munazza K.;Banerjee, Agnibha;Barstow, Joanna K.;Blecic, Jasmina;Casewell, S. L.;Changeat, Quentin;Chubb, K. L.;Colon, Knicole D.;Coulombe, Louis-Philippe;Daylan, Tansu;De Val-Borro, Miguel;Decin, Leen;Dos Santos, Leonardo A.;Flagg, Laura;France, Kevin;Fu, Guangwei;Munoz, A. Garcia;Gizis, John E.;Glidden, Ana;Grant, David;Heng, Kevin;Henning, Thomas;Hong, Yu-Cian;Inglis, Julie;Iro, Nicolas;Kataria, Tiffany;Komacek, Thaddeus D.;Krick, Jessica E.;Lee, Elspeth K. H.;Lewis, Nikole K.;Lillo-Box, Jorge;Lustig-Yaeger, Jacob;Mancini, Luigi;Mandell, Avi M.;Mansfield, Megan;Marley, Mark S.;Mikal-Evans, Thomas;Morello, Giuseppe;Nixon, Matthew C.;Ceballos, Kevin Ortiz;Piette, Anjali A. A.;Powell, Diana;Rackham, Benjamin, V;Ramos-Rosado, Lakeisha;Rauscher, Emily;Redfield, Seth;Rogers, Laura K.;Roman, Michael T.;Roudier, Gael M.;Scarsdale, Nicholas;Shkolnik, Evgenya L.;Southworth, John;Spake, Jessica J.;Steinrueck, Maria E.;Tan, Xianyu;Teske, Johanna K.;Tremblin, Pascal;Tsai, Shang-Min;Tucker, Gregory S.;Turner, Jake D.;Valenti, Jeff A.;Venot, Olivia;Waldmann, Ingo P.;Wallack, Nicole L.;Zhang, Xi;Zieba, Sebastian
二氧化碳 (CO2) 是一种重要的化学物质，广泛存在于行星大气中。在系外行星中，二氧化碳是金属富集度（即比氦重的元素，也称为“金属丰度”）的指标，也是热气巨星原始大气形成过程的指标。它也是最有希望在类地系外行星的次生大气中探测到的物种之一。之前用斯皮策太空望远镜对凌日行星进行的光度测量已经给出了二氧化碳存在的暗示，但由于缺乏明确的光谱识别，尚未得出明确的检测结果。在此，我们展示了通过 JWST 获得的透射光谱观测结果，作为早期释放科学计划的一部分，对气态巨行星 WASP-39b 大气中的二氧化碳进行了检测。本研究中使用的数据波长范围为 3.0–5.5 微米，并在 4.3 微米处显示出显着的 CO2 吸收特征（26 西格玛显着性）。整个光谱与一维十倍太阳金属丰度模型很好地匹配，该模型假设辐射-对流-热化学平衡并具有中等云不透明度。这些模型预测，除了二氧化碳之外，大气中还应该含有水、一氧化碳和硫化氢，但甲烷含量很少。此外，我们还尝试性地检测到 4.0 微米附近的小吸收特征，这些模型未重现该特征。詹姆斯·韦伯太空望远镜的透射光谱观测显示，在气态巨行星 WASP-39b 的大气中检测到了二氧化碳。
Carbon dioxide (CO2) is a key chemical species that is found in a wide range of planetary atmospheres. In the context of exoplanets, CO2 is an indicator of the metal enrichment (that is, elements heavier than helium, also called ‘metallicity’), and thus the formation processes of the primary atmospheres of hot gas giants. It is also one of the most promising species to detect in the secondary atmospheres of terrestrial exoplanets. Previous photometric measurements of transiting planets with the Spitzer Space Telescope have given hints of the presence of CO2, but have not yielded definitive detections owing to the lack of unambiguous spectroscopic identification. Here we present the detection of CO2 in the atmosphere of the gas giant exoplanet WASP-39b from transmission spectroscopy observations obtained with JWST as part of the Early Release Science programme. The data used in this study span 3.0–5.5 micrometres in wavelength and show a prominent CO2 absorption feature at 4.3 micrometres (26-sigma significance). The overall spectrum is well matched by one-dimensional, ten-times solar metallicity models that assume radiative–convective–thermochemical equilibrium and have moderate cloud opacity. These models predict that the atmosphere should have water, carbon monoxide and hydrogen sulfide in addition to CO2, but little methane. Furthermore, we also tentatively detect a small absorption feature near 4.0 micrometres that is not reproduced by these models. Transmission spectroscopy observations from the James Webb Space Telescope show the detection of carbon dioxide in the atmosphere of the gas giant exoplanet WASP-39b.
登录
查看更多内容
影响因子：
4.9
作者：
Fischer, Patrick D.;Knutson, Heather A.;Vidal-Madjar, Alfred
通讯作者：
Vidal-Madjar, Alfred
影响因子：
4.9
作者：
Fortney, JJ;Marley, MS;Freedman, R
通讯作者：
Freedman, R
影响因子：
7.9
作者：
Fu, Guangwei;Deming, Drake;Fraine, Jonathan
通讯作者：
Fraine, Jonathan
影响因子：
3.5
作者：
Deming, D.;Seager, S.;Ennico, K.
通讯作者：
Ennico, K.
影响因子：
6.5
作者：
Drummond, B.;Tremblin, P.;Goyal, J.
通讯作者：
Goyal, J.