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Wagner, K; Boehle, A; Pathak, P; Kasper, M; Arsenault, R; Jakob, G; Käufl, U; Leveratto, S; Maire, A-L; Pantin, E; Siebenmorgen, R; Zins, G; Absil, O; Ageorges, N; Apai, D; Carlotti, A; Choquet, É; Delacroix, C; Dohlen, K; Duhoux, P; Forsberg, P; Fuenteseca, E; Gutruf, S; Guyon, O; Huby, E; Kampf, D; Karlsson, M; Kervella, P; Kirchbauer, J-P; Klupar, P; Kolb, J; Mawet, D; N'Diaye, M; Orban de Xivry, G; Quanz, S P; Reutlinger, A; Ruane, G; Riquelme, M; Soenke, C; Sterzik, M; Vigan, A; de Zeeuw, T
Nature communications, 02/2021, Letnik: 12, Številka: 1Journal Article, Web Resource
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, α Centauri. Based on 75-80% of the best quality images from 100 h of cumulative observations, we demonstrate sensitivity to warm sub-Neptune-sized planets throughout much of the habitable zone of α 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 α 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.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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