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arXiv 2102.05159astro-ph.EPastro-ph.SR
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半人马座α星宜居带内低质量行星的成像

Imaging low-mass planets within the habitable zone of α Centauri

K. Wagner, A. Boehle, P. Pathak, M. Kasper, R. Arsenault, G. Jakob, U. Kaufl, S. Leveratto, A. -L. Maire, E. Pantin, R. Siebenmorgen, G. Zins, O. Absil, N. Ageo… 展开作者

K. Wagner, A. Boehle, P. Pathak, M. Kasper, R. Arsenault, G. Jakob, U. Kaufl, S. Leveratto, A. -L. Maire, E. Pantin, R. Siebenmorgen, G. Zins, O. Absil, N. Ageorges, D. Apai, A. Carlotti, É. Choquet, C. Delacroix, K. Dohlen, P. Duhoux, P. Forsberg, E. Fuenteseca, S. Gutruf, O. Guyon, E. Huby, D. Kampf, M. Karlsson, P. Kervella, J. -P. Kirchbauer, P. Klupar, J. Kolb, D. Mawet, M. N'Diaye, G. Orban de Xivry, S. P. Quanz, A. Reutlinger, G. Ruane, M. Riquelme, C. Soenke, M. Sterzik, A. Vigan, T. de Zeeuw

摘要:

巨大的系外行星在广阔的轨道上已经被直接成像在年轻恒星周围。如果中红外线的热背景可以减轻,那么质量较低的系外行星也可以成像。在这里,我们提出了一种基于地面的中红外观测方法,可以对附近恒星周围的低质量温带系外行星进行成像,特别是在最近的恒星系统Alpha Centauri内。基于100小时累积观测中75-80%的最佳质量图像,我们证明了在半人马座阿尔法A的大部分宜居带中对温暖的亚海王星大小的行星的敏感性。这比最先进的系外行星成像质量检测极限更敏感一个数量级。我们还讨论了在半人马座阿尔法A周围可能探测到的系外行星或系外黄道盘。然而,不能排除来源不明的仪器伪影。这些结果证明了用当前和即将到来的望远镜成像岩石可居住区系外行星的可行性。

英文摘要:

Giant exoplanets on wide orbits have been directly imaged around young stars. If the thermal background in the mid-infrared can be mitigated, then exoplanets with lower masses can also be imaged. Here we present a ground-based mid-infrared observing approach that enables imaging low-mass temperate exoplanets around nearby stars, and in particular within the closest stellar system, Alpha Centauri. Based on 75-80% of the best quality images from 100 hours of cumulative observations, we demonstrate sensitivity to warm sub-Neptune-sized planets throughout much of the habitable zone of Alpha Centauri A. This is an order of magnitude more sensitive than state-of-the-art exoplanet imaging mass detection limits. We also discuss a possible exoplanet or exozodiacal disk detection around Alpha Centauri A. However, an instrumental artifact of unknown origin cannot be ruled out. These results demonstrate the feasibility of imaging rocky habitable-zone exoplanets with current and upcoming telescopes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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