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A possibly solar metallicity atmosphere escaping from HAT-P-32b revealed by Hα and He absorption

文献类型：期刊论文

作者Yan DD(闫冬冬)6,7,8; Guo JH(郭建恒)5,6,7,8; Seon, Kwang-il3,4; López, Manuel2; Czesla, Stefan1; Lampón, Manuel2
刊名ASTRONOMY & ASTROPHYSICS
出版日期2024-06-13
卷号686
关键词hydrodynamics radiative transfer methods: numerical planets and satellites: atmospheres planets and satellites: composition planets and satellites: individual: HAT-P-32b
ISSN号0004-6361
DOI10.1051/0004-6361/202348210
产权排序第1完成单位
文献子类Article
英文摘要This paper presents a hydrodynamic simulation that couples detailed non-local thermodynamic equilibrium (NLTE) calculations of the helium and hydrogen level populations to model the H alpha and He 10830 transmission spectra of the hot Jupiter HAT-P-32b. A Monte Carlo simulation was applied to calculate the number of Ly alpha resonance scatterings, which is the main process for populating H(2). In the examined parameter space, only models with H/He >= 99.5/0.5, (0.5 similar to 3.0) times the fiducial value of F-XUV, and spectral index beta(m) = (0.16 similar to 0.3), can explain the H alpha and He 10830 lines simultaneously. We found a mass-loss rate of similar to(1.0 similar to 3.1) x 10(13) g s(-1), consistent with previous studies. Moreover, we found that the stellar Ly alpha flux should be as high as 4 x 10(5) erg cm(-2) s(-1), indicating high stellar activity during the observation epoch of the two absorption lines. Despite the fact that the metallicity in the lower atmosphere of HAT-P-32b may be super-solar, our simulations tentatively suggest it is close to solar in the upper atmosphere. Understanding the difference in metallicity between the lower and upper atmospheres is essential for future atmospheric characterisations.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
WOS关键词EXTENDED UPPER-ATMOSPHERE ; INTRINSIC LY-ALPHA ; MASS-LOSS RATES ; TRANSMISSION SPECTRUM ; EXOPLANET ATMOSPHERES ; RADIATIVE-TRANSFER ; HELIUM ABSORPTION ; FRAUNHOFER LINES ; NEUTRAL HYDROGEN ; PARTICLE FLUXES
资助项目Strategic Priority Research Program of the 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[12288102]; National Natural Science Foundation of China[42305136]; Natural Science Foundation of Yunnan Province[202201AT070158]; Natural Science Foundation of Yunnan Province[202401CF070041]; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001]; National Research Foundation of Korea (NRF) - Korean government (MSIT)[2020R1A2C1005788]; Korea Astronomy and Space Science Institute - Korea government (MSIT)[2023183000]; DFG[CZ 222/5-1]; Agencia Estatal de Investigacion, MCIN/AEI[PID2022-141216NB-I00]; Agencia Estatal de Investigacion, MCIN/AEI[CEX2021-001131-S]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001246762400011
出版者EDP SCIENCES S A
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences[XDB 41000000] ; National Key R&D Program of China[2021YFA1600400/2021YFA1600402] ; National Natural Science Foundation of China[11973082, 12288102, 42305136] ; Natural Science Foundation of Yunnan Province[202201AT070158, 202401CF070041] ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001] ; National Research Foundation of Korea (NRF) - Korean government (MSIT)[2020R1A2C1005788] ; Korea Astronomy and Space Science Institute - Korea government (MSIT)[2023183000] ; DFG[CZ 222/5-1] ; Agencia Estatal de Investigacion, MCIN/AEI[PID2022-141216NB-I00, CEX2021-001131-S]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/27405]  
专题云南天文台_恒星物理研究组
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany
2.Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, 18008 Granada, Spain;
3.Astronomy and Space Science Major, University of Science and Technology,217, Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea;
4.Korea Astronomy & Space Science Institute,776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of Korea;
5.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, PR China;
6.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, PR China;
7.Key Laboratory for the Structure and Evolution of Celestial Objects, CAS, Kunming 650216, PR China;
8.Yunnan Observatories, Chinese Academy of Sciences, PO Box 110, Kunming 650216, PR China;
推荐引用方式
GB/T 7714		 Yan DD,Guo JH,Seon, Kwang-il,et al. A possibly solar metallicity atmosphere escaping from HAT-P-32b revealed by Hα and He absorption[J]. ASTRONOMY & ASTROPHYSICS,2024,686.
APA 闫冬冬,郭建恒,Seon, Kwang-il,López, Manuel,Czesla, Stefan,&Lampón, Manuel.(2024).A possibly solar metallicity atmosphere escaping from HAT-P-32b revealed by Hα and He absorption.ASTRONOMY & ASTROPHYSICS,686.
MLA 闫冬冬,et al."A possibly solar metallicity atmosphere escaping from HAT-P-32b revealed by Hα and He absorption".ASTRONOMY & ASTROPHYSICS 686(2024).

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来源：云南天文台

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