How does thermal scattering shape the infrared spectra of cloudy exoplanets? A theoretical framework and consequences for atmospheric retrievals in the JWST era
How does thermal scattering shape the infrared spectra of cloudy exoplanets? A theoretical framework and consequences for atmospheric retrievals in the JWST era
复制标题
热散射如何塑造云状系外行星的红外光谱？
DOI：
10.1093/mnras/stab1854
复制
发表时间：
2020
影响因子：
4.8
通讯作者：
S. Aigrain
中科院分区：
文献类型：
--
作者：
Jake Taylor;V. Parmentier;M. Line;Elspeth K. H. Lee;P. Irwin;S. Aigrain
对系外行星的观测研究表明，云的存在无处不在。目前用来解释云的排放的模拟技术往往需要云凝结种类的先验知识，而且往往没有考虑云的散射效应。我们通过模拟一组具有不同云单次散射反照率(SSA)和温度分布的热木星大气来探索热散射对发射光谱的影响。我们考察了从简单的等温条件到更复杂的结构和物理驱动的云模型的各种情况。我们表明，如果不考虑散射，夜间云的散射将导致亮温低于实际大气温度。我们发现，即使在等温大气中，散射也可以在发射光谱中产生光谱特征。我们确定了当来自云的散射主导光谱形状时，在模拟的JWST光谱的背景下出现的反演简并和偏差。最后，我们提出了一种新的方法来拟合排放反演中的云的SSA谱，使用的技术不需要任何云的化学或物理属性的先验知识。
Observational studies of exoplanets are suggestive of a ubiquitous presence of clouds. The current modelling techniques used in emission to account for the clouds tend to require prior knowledge of the cloud condensing species and often do not consider the scattering effects of the cloud. We explore the effects that thermal scattering has on the emission spectra by modelling a suite of hot Jupiter atmospheres with varying cloud single-scattering albedos (SSAs) and temperature profiles. We examine cases ranging from simple isothermal conditions to more complex structures and physically driven cloud modelling. We show that scattering from nightside clouds would lead to brightness temperatures that are cooler than the real atmospheric temperature if scattering is unaccounted for. We show that scattering can produce spectral signatures in the emission spectrum even for isothermal atmospheres. We identify the retrieval degeneracies and biases that arise in the context of simulated JWST spectra when the scattering from the clouds dominates the spectral shape. Finally, we propose a novel method of fitting the SSA spectrum of the cloud in emission retrievals, using a technique that does not require any prior knowledge of the cloud chemical or physical properties.
登录
查看更多内容
影响因子：
4.8
作者：
Arazi Pinhas;N. Madhusudhan;S. Gandhi;R. MacDonald
通讯作者：
Arazi Pinhas;N. Madhusudhan;S. Gandhi;R. MacDonald
影响因子：
3
作者：
G. Tinetti;P. Drossart;P. Eccleston;P. Hartogh;A. Heske;J. Leconte;G. Micela;M. Ollivier;G. Pilbratt;L. Puig;D. Turrini;B. Vandenbussche;Paulina Wolkenberg;J. Beaulieu;L. A. Buchave;Martin Ferus;M. Griffin;M. Guedel;K. Justtanont;P. Lagage;Pedro Machado;G. Malaguti;Michiel Min;H. Nørgaard-Nielsen;Mirek Rataj;T. Ray;Ignasi Ribas;M. Swain;R. Szabó;Stephanie C. Werner;J. Barstow;Matt Burleigh;James Cho;V. C. du Foresto;A. Coustenis;L. Decin;T. Encrenaz;M. Galand;M. Gillon;R. Helled;J. C. Morales;A. G. Muñoz;A. Moneti;Isabella Pagano;E. Pascale;G. Piccioni;David Pinfield;Subhajit Sarkar;F. Selsis;J. Tennyson;A. Triaud;O. Venot;I. Waldmann;David Waltham;Gillian S. Wright;J. Amiaux;J. Auguères;M. Berthé;N. Bezawada;G. Bishop;Neil Bowles;Deirdre Coffey;J. Colomé;M. Crook;P. Crouzet;Vania Da Peppo;I. E. Sanz;M. Focardi;M. Frericks;Tom Hunt;R. Kohley;K. Middleton;G. Morgante;R. Ottensamer;E. Pace;Chris Pearson;R. Stamper;K. Symonds;M. Rengel;E. Renotte;P. Ade;L. Affer;Christophe Alard;Nicole F. Allard;F. Altieri;Yves André;Claudio Arena;I. Argyriou;Alan Aylward;C. Baccani;Gáspár Á. Bakos;M. Banaszkiewicz;Mike Barlow;V. Batista;G. Bellucci;S. Benatti;Pernelle Bernardi;Bruno Bézard;M. Błęcka;É. Bolmont;B. Bonfond;R. Bonito;A. Bonomo;J. Brucato;Allan Sacha Brun;I. Bryson;W. Bujwan;S. Casewell;B. Charnay;C. Pestellini;Guo Chen;A. Ciaravella;R. Claudi;R. Clédassou;M. Damasso;M. Damiano;C. Danielski;Pieter Deroo;A. D. di Giorgio;Carsten Dominik;V. Doublier;S. Doyle;René Doyon;Benjamin Drummond;Bastien Duong;S. Eales;Billy Edwards;Maria Farina;E. Flaccomio;Leigh Fletcher;F. Forget;Steve Fossey;Markus Fränz;Yuka Fujii;A. Garcia-Piquer;W. Gear;H. Geoffray;Jean-Claude Gérard;L. Gesa;H. Gomez;Rafał Graczyk;C. Griffith;D. Grodent;M. Guarcello;J. Gustin;K. Hamano;P. Hargrave;Y. Hello;Kevin Heng;E. Herrero;A. Hornstrup;Benoît Hubert;Shigeru Ida;M. Ikoma;N. Iro;Patrick Irwin;C. Jarchow;Jean Jaubert;Hugh R. A. Jones;Queyrel Julien;Shingo Kameda;F. Kerschbaum;P. Kervella;T. Koskinen;M. Krijger;N. Krupp;M. Lafarga;F. Landini;E. Lellouch;G. Leto;A. Luntzer;T. Rank-Lüftinger;Antonio Maggio;J. Maldonado;Jean-Pierre Maillard;Urs Mall;J. Marquette;Stéphane Mathis;P. Maxted;T. Matsuo;A. Medvedev;Yamila Miguel;V. Minier;G. Morello;Alessandro Mura;N. Narita;V. Nascimbeni;N. Nguyen Tong;V. Noce;F. Oliva;E. Pallé;Paul Palmer;M. Pancrazzi;A. Papageorgiou;V. Parmentier;M. Perger;A. Petralia;S. Pezzuto;Ray Pierrehumbert;I. Pillitteri;G. Piotto;G. Pisano;L. Prisinzano;A. Radioti;J. Réess;L. Rezac;M. Rocchetto;A. Rosich;N. Sanna;A. Santerne;G. Savini;G. Scandariato;B. Sicardy;Carles Sierra;G. Sindoni;K. Skup;I. Snellen;M. Sobiecki;L. Soret;A. Sozzetti;A. Stiepen;A. Strugarek;Jake Taylor;William Taylor;L. Terenzi;M. Tessenyi;A. Tsiaras;C. Tucker;Diana Valencia;G. Vasisht;A. Vazan;F. Vilardell;S. Vinatier;S. Viti;Rens Waters;P. Wawer;A. Wawrzaszek;A. Whitworth;Yuk L. Yung;S. Yurchenko;M. Z. Osorio;R. Zellem;T. Zingales;F. Zwart
通讯作者：
G. Tinetti;P. Drossart;P. Eccleston;P. Hartogh;A. Heske;J. Leconte;G. Micela;M. Ollivier;G. Pilbratt;L. Puig;D. Turrini;B. Vandenbussche;Paulina Wolkenberg;J. Beaulieu;L. A. Buchave;Martin Ferus;M. Griffin;M. Guedel;K. Justtanont;P. Lagage;Pedro Machado;G. Malaguti;Michiel Min;H. Nørgaard-Nielsen;Mirek Rataj;T. Ray;Ignasi Ribas;M. Swain;R. Szabó;Stephanie C. Werner;J. Barstow;Matt Burleigh;James Cho;V. C. du Foresto;A. Coustenis;L. Decin;T. Encrenaz;M. Galand;M. Gillon;R. Helled;J. C. Morales;A. G. Muñoz;A. Moneti;Isabella Pagano;E. Pascale;G. Piccioni;David Pinfield;Subhajit Sarkar;F. Selsis;J. Tennyson;A. Triaud;O. Venot;I. Waldmann;David Waltham;Gillian S. Wright;J. Amiaux;J. Auguères;M. Berthé;N. Bezawada;G. Bishop;Neil Bowles;Deirdre Coffey;J. Colomé;M. Crook;P. Crouzet;Vania Da Peppo;I. E. Sanz;M. Focardi;M. Frericks;Tom Hunt;R. Kohley;K. Middleton;G. Morgante;R. Ottensamer;E. Pace;Chris Pearson;R. Stamper;K. Symonds;M. Rengel;E. Renotte;P. Ade;L. Affer;Christophe Alard;Nicole F. Allard;F. Altieri;Yves André;Claudio Arena;I. Argyriou;Alan Aylward;C. Baccani;Gáspár Á. Bakos;M. Banaszkiewicz;Mike Barlow;V. Batista;G. Bellucci;S. Benatti;Pernelle Bernardi;Bruno Bézard;M. Błęcka;É. Bolmont;B. Bonfond;R. Bonito;A. Bonomo;J. Brucato;Allan Sacha Brun;I. Bryson;W. Bujwan;S. Casewell;B. Charnay;C. Pestellini;Guo Chen;A. Ciaravella;R. Claudi;R. Clédassou;M. Damasso;M. Damiano;C. Danielski;Pieter Deroo;A. D. di Giorgio;Carsten Dominik;V. Doublier;S. Doyle;René Doyon;Benjamin Drummond;Bastien Duong;S. Eales;Billy Edwards;Maria Farina;E. Flaccomio;Leigh Fletcher;F. Forget;Steve Fossey;Markus Fränz;Yuka Fujii;A. Garcia-Piquer;W. Gear;H. Geoffray;Jean-Claude Gérard;L. Gesa;H. Gomez;Rafał Graczyk;C. Griffith;D. Grodent;M. Guarcello;J. Gustin;K. Hamano;P. Hargrave;Y. Hello;Kevin Heng;E. Herrero;A. Hornstrup;Benoît Hubert;Shigeru Ida;M. Ikoma;N. Iro;Patrick Irwin;C. Jarchow;Jean Jaubert;Hugh R. A. Jones;Queyrel Julien;Shingo Kameda;F. Kerschbaum;P. Kervella;T. Koskinen;M. Krijger;N. Krupp;M. Lafarga;F. Landini;E. Lellouch;G. Leto;A. Luntzer;T. Rank-Lüftinger;Antonio Maggio;J. Maldonado;Jean-Pierre Maillard;Urs Mall;J. Marquette;Stéphane Mathis;P. Maxted;T. Matsuo;A. Medvedev;Yamila Miguel;V. Minier;G. Morello;Alessandro Mura;N. Narita;V. Nascimbeni;N. Nguyen Tong;V. Noce;F. Oliva;E. Pallé;Paul Palmer;M. Pancrazzi;A. Papageorgiou;V. Parmentier;M. Perger;A. Petralia;S. Pezzuto;Ray Pierrehumbert;I. Pillitteri;G. Piotto;G. Pisano;L. Prisinzano;A. Radioti;J. Réess;L. Rezac;M. Rocchetto;A. Rosich;N. Sanna;A. Santerne;G. Savini;G. Scandariato;B. Sicardy;Carles Sierra;G. Sindoni;K. Skup;I. Snellen;M. Sobiecki;L. Soret;A. Sozzetti;A. Stiepen;A. Strugarek;Jake Taylor;William Taylor;L. Terenzi;M. Tessenyi;A. Tsiaras;C. Tucker;Diana Valencia;G. Vasisht;A. Vazan;F. Vilardell;S. Vinatier;S. Viti;Rens Waters;P. Wawer;A. Wawrzaszek;A. Whitworth;Yuk L. Yung;S. Yurchenko;M. Z. Osorio;R. Zellem;T. Zingales;F. Zwart
影响因子：
4.8
作者：
R. MacDonald;N. Madhusudhan
通讯作者：
R. MacDonald;N. Madhusudhan
DOI：
10.1088/1538-3873/aadbf3
发表时间：
2018-11-01
影响因子：
3.5
作者：
Bean, Jacob L.;Stevenson, Kevin B.;Zingales, Tiziano
通讯作者：
Zingales, Tiziano