Exoplanet transit variability: bow shocks and winds around HD 189733b
Exoplanet transit variability: bow shocks and winds around HD 189733b
复制标题
系外行星凌日变率:HD 189733b 周围的弓形冲击和风
DOI:
10.1093/mnras/stt1725
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发表时间:
2013
影响因子:
4.8
通讯作者:
Llama J
中科院分区:
文献类型:
--
作者:
Llama J
By analogy with the Solar system, it is believed that stellar winds will form bow shocks around exoplanets. For hot Jupiters the bow shock will not form directly between the planet and the star, causing an asymmetric distribution of mass around the exoplanet and hence an asymmetric transit. As the planet orbits through varying wind conditions, the strength and geometry of its bow shock will change, thus producing transits of varying shape. We model this process using magnetic maps of HD 189733 taken one year apart, coupled with a 3D stellar wind model, to determine the local stellar wind conditions throughout the orbital path of the planet. We predict the time-varying geometry and density of the bow shock that forms around the magnetosphere of the planet and simulate transit light curves. Depending on the nature of the stellar magnetic field, and hence its wind, we find that both the transit duration and ingress time can vary when compared to optical light curves. We conclude that consecutive near-UV transit light curves may vary significantly and can therefore provide an insight into the structure and evolution of the stellar wind.
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DOI:
10.1088/0004-637x/713/2/751
发表时间:
2009
期刊:
The Astrophysical Journal
影响因子:
--
作者:
L. Ibgui;A. Burrows;D. Spiegel
通讯作者:
D. Spiegel
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
A. Vidotto;M. Jardine;J. Morin;J. Donati;P. Lang;A. Russell
通讯作者:
A. Russell
DOI:
10.1088/0004-637x/721/2/923
发表时间:
2010
期刊:
The Astrophysical Journal
影响因子:
--
作者:
D. Lai;C. Helling;E. V. D. van den Heuvel
通讯作者:
E. V. D. van den Heuvel
DOI:
10.1111/j.1365-2966.2010.16715.x
发表时间:
2010
影响因子:
4.8
作者:
R. Fares;J. Donati;C. Moutou;M. Jardine;J. Grießmeier;P. Zarka;E. Shkolnik;D. Bohlender;C. Català;A. C. Cameron
通讯作者:
A. C. Cameron
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
Aline Vidotto;M. Jardine;Christiane Helling
通讯作者:
Christiane Helling