Planetary eclipse mapping of CoRoT-2a - Evolution, differential rotation, and spot migration

Planetary eclipse mapping of CoRoT-2a - Evolution, differential rotation, and spot migration
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CoRoT-2a 的行星食测绘 - 演化、差分自转和点偏移

DOI:
10.1051/0004-6361/200913914
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发表时间:
2010
影响因子:
6.5
通讯作者:
J. H. M. M.
J. H. M. M.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Czesla;Wolter;Schmitt;J. H. M. M.

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CoRoT-2的光变曲线显示了由恒星黑子引起的行星凌日轮廓的大量旋转调制和变形。我们一致地模拟了整个光变曲线,包括旋转调制和凌日,延伸到大约30个恒星旋转和79个凌日。利用凌日路径下的高分辨率,给出并分析了在非食面和食面截面上的光斑分布及其演化,测得食面截面上的平均表面亮度比非食面截面上的平均表面亮度低(5±1)%。采用太阳黑子对比度,黑子在整个表面的覆盖率达到19%,在日食段最高接近40%。过境路径下的特征,即靠近赤道的特征,以接近4.55天的周期旋转。在无食部分的特征中,发现了明显更高的自转周期,这表明差异自转ΔΩ> 0.1。两个表面部分的斑点和非斑点区域集中在大约180°分开的优选的边缘上。
The lightcurve of CoRoT-2 shows substantial rotational modulation and deformations of the planet's transit profiles caused by starspots. We consistently model the entire lightcurve, including both rotational modulation and transits, stretching over approximately 30 stellar rotations and 79 transits. The spot distribution and its evolution on the noneclipsed and eclipsed surface sections are presented and analyzed, making use of the high resolution achievable under the transit path. We measure the average surface brightness on the eclipsed section to be (5±1)% lower than on the noneclipsed section. Adopting a solar spot contrast, the spot coverage on the entire surface reaches up to 19% and a maximum of almost 40% on the eclipsed section. Features under the transit path, i.e. close to the equator, rotate with a period close to 4.55 days. Significantly higher rotation periods are found for features on the noneclipsed section indicating a differential rotation ofΔΩ> 0.1. Spotted and unspotted regions in both surface sections concentrate on preferred longitudes separated by roughly 180°.
凌日系外行星 CoRoT-2b 的二次日食
DOI: 10.1051/0004-6361/200912505
发表时间: 2009
影响因子: 6.5
作者:
R. Alonso;T. Guillot;T. Mazeh;T. Mazeh;S. Aigrain;A. Alapini;P. Barge;A. Hatzes;F. Pont
通讯作者: F. Pont
DOI: --
发表时间: 2008
期刊:
影响因子: --
作者:
R. Alonso;M. Auvergne;A. Baglin;M. Ollivier;C. Moutou;D. Rouan;H. Deeg;S. Aigrain;J. Almenara;M. Barbieri;P. Barge;W. Benz;P. Bord'e;F. Bouchy;R. Reza;M. Deleuil;R. Dvorak;A. Erikson;M. Fridlund;M. Gillon;P. Gondoin;T. Guillot;A. Hatzes;G. H'ebrard;P. Kabáth;L. Jorda;H. Lammer;A. L'eger;A. Llebaria;B. Loeillet;P. Magain;M. Mayor;T. Mazeh;M. Patzold;F. Pepe;F. Pont;D. Queloz;H. Rauer;Avi Shporer;J. Schneider;B. Stecklum;S. Udry;G. Wuchterl
通讯作者: G. Wuchterl
DOI: 10.1051/0004-6361:200810591
发表时间: 2009-01-01
影响因子: 6.5
作者:
Lanza, A. F.;Pagano, I.;Weiss, W. W.
通讯作者: Weiss, W. W.
DOI: 10.1051/0004-6361/200912454
发表时间: 2009-06
影响因子: 6.5
作者:
S. Czesla;K. Huber;U. Wolter;S. Schröter;J. Schmitt
通讯作者: S. Czesla;K. Huber;U. Wolter;S. Schröter;J. Schmitt
DOI: 10.1051/0004-6361:200809433
发表时间: 2008
影响因子: 6.5
作者:
F. Bouchy;D. Queloz;M. Deleuil;B. Loeillet;A. Hatzes;S. Aigrain;R. Alonso;M. Auvergne;A. Baglin;P. Barge;W. Benz;P. Bordé;H. Deeg;R. Reza;R. Dvorak;A. Erikson;M. Fridlund;P. Gondoin;T. Guillot;G. Hébrard;L. Jorda;H. Lammer;A. L'eger;A. Llebaria;P. Magain;M. Mayor;C. Moutou;M. Ollivier;M. Pätzold;F. Pepe;F. Pont;H. Rauer;D. Rouan;J. Schneider;A. Triaud;S. Udry;G. Wuchterl
通讯作者: G. Wuchterl