The center-to-limb variation across the Fraunhofer lines of HD 189733; Sampling the stellar spectrum using a transiting planet
The center-to-limb variation across the Fraunhofer lines of HD 189733; Sampling the stellar spectrum using a transiting planet
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HD 189733 的夫琅和费线的中心到肢体的变化;
DOI:
10.1051/0004-6361/201526386
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
Czesla
中科院分区:
文献类型:
--
作者:
Czesla
The center-to-limb variation (CLV) describes the brightness of the stellar disk as a function of the limb angle. Across strong absorption lines, the CLV can vary quite significantly. We obtained a densely sampled time series of high-resolution transit spectra of the active planet host star HD 189733 with UVES. Using the passing planetary disk of the hot Jupiter HD 189733 b as a probe, we study the CLV in the wings of the Ca ii H and K and Na i D1and D2Fraunhofer lines, which are not strongly affected by activity-induced variability. In agreement with model predictions, our analysis shows that the wings of the studied Fraunhofer lines are limb brightened with respect to the (quasi-)continuum. The strength of the CLV-induced effect can be on the same order as signals found for hot Jupiter atmospheres. Therefore, a careful treatment of the wavelength dependence of the stellar CLV in strong absorption lines is highly relevant in the interpretation of planetary transit spectroscopy.
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影响因子:
6.5
作者:
S. Lalitha;B. Fuhrmeister;U. Wolter;J. Schmitt;D. Engels;M. Wieringa
通讯作者:
S. Lalitha;B. Fuhrmeister;U. Wolter;J. Schmitt;D. Engels;M. Wieringa
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
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通讯作者:
T. Barman
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
D. F. Gray;Kevin I. T. Brown
通讯作者:
Kevin I. T. Brown
DOI:
--
发表时间:
1972
期刊:
影响因子:
--
作者:
R. Athay;B. Lites;O. White;J. Brault
通讯作者:
J. Brault
DOI:
10.1086/142826
发表时间:
1924-07
期刊:
The Astrophysical Journal
影响因子:
--
作者:
D. B. McLaughlin
通讯作者:
D. B. McLaughlin