The overflowing atmosphere of WASP-121 b High-resolution He I λ10833 transmission spectroscopy with VLT/CRIRES+

被引：0

作者：

Czesla, S. ^{[1
]}

Nail, F. ^{[2
]}

Lavail, A. ^{[3
]}

Cont, D. ^{[4
,5
]}

Nortmann, L. ^{[6
]}

Lesjak, F. ^{[6
]}

Rengel, M. ^{[7
]}

Boldt-Christmas, L. ^{[8
]}

Shulyak, D. ^{[9
]}

Seemann, U. ^{[6
,10
]}

Schneider, P. C. ^{[11
]}

Hatzes, A. ^{[1
]}

Kochukhov, O. ^{[8
]}

Piskunov, N. ^{[8
]}

Reiners, A. ^{[6
]}

Wilson, D. J. ^{[12
]}

Yan, F. ^{[13
]}

机构：

[1] Thuringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg, Germany

[2] Univ Amsterdam, Anton Pannekoek Inst Astron, NL-1090 GE Amsterdam, Netherlands

[3] Univ Toulouse, Inst Rech Astrophys & Planetol, CNRS, IRAP,UMR 5277, 14 Ave Edouard Belin, F-31400 Toulouse, France

[4] Ludwig Maximilians Univ Munchen, Univ Sternwarte, Scheinerstr 1, D-81679 Munich, Germany

[5] Exzellenzcluster ORIGINS, Boltzmannstr 2, D-85748 Garching, Germany

[6] Georg August Univ, Inst Astrophys & Geophys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany

[7] Max Planck Inst Sonnensystemforsch, Justus Von Liebig Weg 3, D-37077 Gottingen, Germany

[8] Uppsala Univ, Dept Phys & Astron, Box 516, S-75120 Uppsala, Sweden

[9] Inst Astrofis Andaluci CSIC, C Glorieta Astron S-N, E-18008 Granada, Spain

[10] European Southern Observ, Munich, Germany

[11] Univ Hamburg, Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany

[12] Univ Colorado Boulder, Lab Atmospher & Space Phys, 600 UCB, Boulder, CO 80303 USA

[13] Univ Sci & Technol China, Dept Astron, Hefei 230026, Peoples R China

来源：

ASTRONOMY & ASTROPHYSICS | 2024年 / 692卷

基金：

中国国家自然科学基金;

关键词：

techniques: spectroscopic; planets and satellites: atmospheres; planets and satellites: individual: WASP-121; X-rays: stars; X-RAY; EXOPLANET ATMOSPHERES; FRAUNHOFER LINES; HOT; SPECTRUM; HELIUM; TAIL; ABSORPTION; EMISSION; HYDROGEN;

D O I：

10.1051/0004-6361/202451003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Transmission spectroscopy is a prime method to study the atmospheres of extrasolar planets. We obtained a high-resolution spectral transit time series of the hot Jupiter WASP-121 b with CRIRES+ to study its atmosphere via transmission spectroscopy of the He I lambda 10833 triplet lines. Our analysis shows a prominent He I lambda 10833 absorption feature moving along with the planetary orbital motion, which shows an observed, transit-averaged equivalent width of approximately 30 m & Aring;, a slight redshift, and a depth of about 2%, which can only be explained by an atmosphere overflowing its Roche lobe. We carried out 3D hydrodynamic modeling to reproduce the observations, which favors asymmetric mass loss with a more pronounced leading tidal tail, possibly also explaining observational evidence for additional absorption stationary in the stellar rest frame. A trailing tail is not detectable. From our modeling, we derived estimates of >= 2 x 10(13 )g s(-1 )for the stellar and 5.4 x 10(12) g s(-1 )for the planetary mass loss rate, which is consistent with X-ray and extreme-ultraviolet (XUV) driven mass loss in WASP-121 b.

引用

页数：14

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