The Hubble Space Telescope PanCET Program: An Optical to Infrared Transmission Spectrum of HAT-P-32Ab

被引：34

作者：

Alam, Munazza K. ^{[1
]}

Lopez-Morales, Mercedes ^{[1
]}

Nikolov, Nikolay ^{[2
]}

Sing, David K. ^{[3
]}

Henry, Gregory W. ^{[4
]}

Baxter, Claire ^{[5
]}

Desert, Jean-Michel ^{[5
]}

Barstow, Joanna K. ^{[6
]}

Mikal-Evans, Thomas ^{[7
]}

Bourrier, Vincent ^{[8
]}

Lavvas, Panayotis ^{[9
]}

Wakeford, Hannah R. ^{[10
]}

Williamson, Michael H. ^{[4
]}

Sanz-Forcada, Jorge ^{[11
]}

Buchhave, Lars A. ^{[12
]}

Cohen, Ofer ^{[13
]}

Munoz, Antonio Garcia ^{[14
]}

机构：

[1] Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 01238 USA

[2] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA

[3] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[4] Tennessee State Univ, Ctr Excellence Informat Syst, Nashville, TN 37209 USA

[5] Univ Amsterdam, Anton Pannekoek Inst Astron, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands

[6] Open Univ, Sch Phys Sci, Walton Hall, Milton Keynes MK7 6AA, Bucks, England

[7] MIT, Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[8] Observ Univ Geneve, Sauverny, Switzerland

[9] Univ Reims, Grp Spectrometrie Mol & Atmospher, Reims, France

[10] Univ Bristol, Sch Phys, HH Wills Phys Lab, Tyndall Ave, Bristol BS8 1TL, Avon, England

[11] Ctr Astrobiol CSIC INTA, ESAC Campus, Madrid, Spain

[12] Tech Univ Denmark, Natl Space Inst, DTU Space, Elektrovej 328, DK-2800 Lyngby, Denmark

[13] Univ Massachusetts, Lowell Ctr Space Sci & Technol, Lowell, MA 01854 USA

[14] Tech Univ Berlin, EW 801,Hardenbergstr 36, D-10623 Berlin, Germany

来源：

ASTRONOMICAL JOURNAL | 2020年 / 160卷 / 01期

基金：

欧洲研究理事会; 美国国家科学基金会;

关键词：

Exoplanet atmospheres; Exoplanet atmospheric composition; Exoplanets; Hot Jupiters; EXOPLANET HD 189733B; NEAR-ULTRAVIOLET; ATMOSPHERE; CLOUDS; ABUNDANCES; PHOTOMETRY; SCATTERING; WASP-19B; AEROSOLS; ABSENCE;

D O I：

10.3847/1538-3881/ab96cb

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a 0.3-5 mu m transmission spectrum of the hot Jupiter HAT-P-32Ab observed with the Space Telescope Imaging Spectrograph and Wide Field Camera 3 instruments mounted on the Hubble Space Telescope, combined with Spitzer Infrared Array Camera photometry. The spectrum is composed of 51 spectrophotometric bins with widths ranging between 150 and 400 A, measured to a median precision of 215 ppm. Comparisons of the observed transmission spectrum to a grid of 1D radiative-convective equilibrium models indicate the presence of clouds/hazes, consistent with previous transit observations and secondary eclipse measurements. To provide more robust constraints on the planet's atmospheric properties, we perform the first full optical to infrared retrieval analysis for this planet. The retrieved spectrum is consistent with a limb temperature of , a thick cloud deck, enhanced Rayleigh scattering, and similar to 10x solar H2O abundance. We find log(Z/Z<sub) =<i, and compare this measurement with the mass-metallicity relation derived for the solar system.

引用

页数：19

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