Modeling the H alpha and He 10830 Transmission Spectrum of WASP-52b | |
Yan DD(闫冬冬)4,5,6; Seon, Kwang-il2,3; Guo JH(郭建恒)4,5,6; Chen, Guo1; Li LF(李立芳)4,5,6 | |
刊名 | ASTROPHYSICAL JOURNAL |
2022-09-01 | |
卷号 | 936期号:2 |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/ac8793 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | Escaping atmosphere has been detected by the excess absorption of Ly alpha, H alpha and He triplet (lambda 10830) lines. Simultaneously modeling the absorption of the H alpha and He lambda 10830 lines can provide useful constraints about the exoplanetary atmosphere. In this paper, we use a hydrodynamic model combined with a non-local thermodynamic model and a new Monte Carlo simulation model to obtain the H(2) and He(2(3) S) populations. The Monte Carlo simulations of Ly alpha radiative transfer are performed with assumptions of a spherical stellar Ly alpha radiation and a spherical planetary atmosphere, for the first time, to calculate the Ly alpha mean intensity distribution inside the planetary atmosphere, necessary in estimating the H(2) population. We model the transmission spectra of the H alpha and He lambda 10830 lines simultaneously in hot Jupiter WASP-52b. We find that models with many different H/He ratios can reproduce the H alpha observations well if the host star has (1) a high X-ray and extreme-ultraviolet (XUV) flux (F (XUV)) and a relatively low X-ray fraction in XUV radiation (beta ( m )) or (2) a low F (XUV) and a high beta ( m ). The simulations of the He lambda 10830 triplet suggest that a high H/He ratio (similar to 98/2) is required to fit the observation. The models that fit both lines well confine F (XUV) to be about 0.5 times the fiducial value and beta ( m ) to have a value around 0.3. The models also suggest that hydrogen and helium originate from the escaping atmosphere, and the mass-loss rate is about 2.8 x 10(11) g s(-1). |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星物理学 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
资助项目 | Strategic Priority Research Program of Chinese Academy of Sciences[XDB 41000000] ; National Key R&D Program of China[2021YFA1600400/2021YFA1600402] ; National Natural Science Foundation of China[11973082] ; National Natural Science Foundation of China[42075122] ; National Natural Science Foundation of China[12122308] ; Natural Science Foundation of Yunnan Province[202201AT070158] ; National Research Foundation of Korea (NRF) - Korean government (MSIT)[2020R1A2C1005788] ; Korea Astronomy and Space Science Institute - Korea government (MSIT)[2022183005] |
WOS关键词 | METASTABLE HELIUM ABSORPTIONS ; 10 830 ANGSTROM ; UPPER-ATMOSPHERE ; RADIATIVE-TRANSFER ; LY-ALPHA ; 3D HYDRODYNAMICS ; WARM NEPTUNE ; X-RAY ; 2 S-3 ; HYDROGEN |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP Publishing Ltd |
WOS记录号 | WOS:000853751500001 |
资助机构 | Strategic Priority Research Program of Chinese Academy of Sciences[XDB 41000000] ; National Key R&D Program of China[2021YFA1600400/2021YFA1600402] ; National Natural Science Foundation of China[11973082, 42075122, 12122308] ; Natural Science Foundation of Yunnan Province[202201AT070158] ; National Research Foundation of Korea (NRF) - Korean government (MSIT)[2020R1A2C1005788] ; Korea Astronomy and Space Science Institute - Korea government (MSIT)[2022183005] |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/25564] |
专题 | 云南天文台_大样本恒星演化研究组 |
通讯作者 | Guo JH(郭建恒) |
作者单位 | 1.Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, People's Republic of China 2.Astronomy and Space Science Major, University of Science and Technology, 217, Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea; 3.Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of Korea; 4.Key Laboratory for the Structure and Evolution of Celestial Objects, CAS, Kunming 650011, People's Republic of China; 5.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, People's Republic of China; 6.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, People's Republic of China; guojh@ynao.ac.cn; |
推荐引用方式 GB/T 7714 | Yan DD,Seon, Kwang-il,Guo JH,et al. Modeling the H alpha and He 10830 Transmission Spectrum of WASP-52b[J]. ASTROPHYSICAL JOURNAL,2022,936(2). |
APA | Yan DD,Seon, Kwang-il,Guo JH,Chen, Guo,&Li LF.(2022).Modeling the H alpha and He 10830 Transmission Spectrum of WASP-52b.ASTROPHYSICAL JOURNAL,936(2). |
MLA | Yan DD,et al."Modeling the H alpha and He 10830 Transmission Spectrum of WASP-52b".ASTROPHYSICAL JOURNAL 936.2(2022). |
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