论文标题
百事可乐系外行驶运输调查（PET）I：研究超级地球上的硅酸盐气氛55 CNC E
The PEPSI Exoplanet Transit Survey (PETS) I: Investigating the presence of a silicate atmosphere on the super-Earth 55 Cnc e
论文作者
论文摘要
对系外行星，尤其是其大气的研究可以通过识别特定的大气物种来揭示其进化的关键见解。对于此类大气研究，高分辨率传播光谱已取得了巨大的成功，尤其是对于木星型行星。朝着较小的行星的大气表征，超级地球外星55 CNC E是迄今为止研究的最有希望的陆地系外行星之一。在这里，我们提出了该行星的高分辨率光谱传输观察，并在大型双眼望远镜上使用百事可乐仪器获得。假设在55 CNC E的表面上存在类似地的地壳物种，可能是从中可能起源的硅酸盐蒸气气氛，我们在其传输谱中搜索以吸收各种原子和电离物种，例如Fe，Fe+，Ca，Ca，Ca+，Mg，Mg和K等。没有发现任何研究物种的吸收，我们能够以1.9 x rp的中值设置吸收限。总之，我们找不到在达到几个行星半径的超矿石上广泛延伸硅酸盐的证据。
The study of exoplanets and especially their atmospheres can reveal key insights on their evolution by identifying specific atmospheric species. For such atmospheric investigations, high-resolution transmission spectroscopy has shown great success, especially for Jupiter-type planets. Towards the atmospheric characterization of smaller planets, the super-Earth exoplanet 55 Cnc e is one of the most promising terrestrial exoplanets studied to date. Here, we present a high-resolution spectroscopic transit observation of this planet, acquired with the PEPSI instrument at the Large Binocular Telescope. Assuming the presence of Earth-like crust species on the surface of 55 Cnc e, from which a possible silicate-vapor atmosphere could have originated, we search in its transmission spectrum for absorption of various atomic and ionized species such as Fe , Fe+, Ca , Ca+, Mg and K , among others. Not finding absorption for any of the investigated species, we are able to set absorption limits with a median value of 1.9 x RP. In conclusion, we do not find evidence of a widely extended silicate envelope on this super-Earth reaching several planetary radii.
