Polar stellar-spots and grazing planetary transits: possible explanation for the low number of discovered grazing planets
Polar stellar-spots and grazing planetary transits: possible explanation for the low number of discovered grazing planets
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极地恒星斑和放牧行星凌日：发现的放牧行星数量较少的可能解释
DOI：
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
J. Lima
中科院分区：
文献类型：
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作者：
M. Oshagh;Nuno C. Santos;P. Figueira;V. Adibekyan;A. Santerne;Susana C. C. Barros;J. Lima
我们评估了一个物理上可行的解释，通过所有地面和空间为基础的过境调查发现的（近）掠食行星过境的数量很少。我们进行了模拟，以根据其影响参数生成可检测行星的合成分布，并发现应该检测到的（近）掠食行星的数量比检测到的要多。我们对（近）掠食行星数量不足的解释是基于一个简单的假设，即大量的（近）掠食行星过境拥有暗巨极斑的宿主恒星，因此过境光变曲线由于掠食行星和极斑的掩星而消失。我们得出结论，通过评估所需的性质，以使消失的掠食过境光曲线的极点，我们得出结论，他们的属性是兼容的预期性能从观察。
We assess a physically feasible explanation for the low number of discovered (near-)grazing planetary transits through all ground and space based transit surveys. We performed simulations to generate the synthetic distribution of detectable planets based on their impact parameter, and found that a larger number of (near-)grazing planets should have been detected than have been detected. Our explanation for the insufficient number of (near-)grazing planets is based on a simple assumption that a large number of (near-)grazing planets transit host stars which harbor dark giant polar spot, and thus the transit light-curve vanishes due to the occultation of grazing planet and the polar spot. We conclude by evaluating the properties required of polar spots in order to make disappear the grazing transit light-curve, and we conclude that their properties are compatible with the expected properties from observations.
影响因子：
4.8
作者：
S. Barros;G. Boué;G. Boué;G. Boué;N. P. Gibson;D. Pollacco;A. Santerne;F. Keenan;I. Skillen;R. Street
通讯作者：
S. Barros;G. Boué;G. Boué;G. Boué;N. P. Gibson;D. Pollacco;A. Santerne;F. Keenan;I. Skillen;R. Street
自洽全球发电机模型中星黑子的形成：冷恒星上的极地黑子
DOI：
10.1051/0004-6361/201424589
发表时间：
2015
期刊：
arXiv: Solar and Stellar Astrophysics
影响因子：
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作者：
Gastine;Christensen;Reiners
通讯作者：
Reiners