在热木星大气中检测到氧化
Elyar Sedaghati1,2,3, Henri M J Boffin1, Ryan J MacDonald4
1European Southern Observatory, Alonso de Córdova 3107, Santiago, Chile.
Nature
|September 15, 2017
概括
研究人员使用传输光谱检测出WASP-19b系外行星大气中的氧化 (TiO). 这一发现推动了对系外行星大气层的研究,
科学领域:
- 外行星科学
- 大气物理
- 光谱学
背景情况:
- 通过在过境过程中过的恒星光来研究系外行星的大气层,从而创建传输光谱.
- 在外行星大气层中检测更重的分子是一项挑战.
- 预计像氧化 (TiO) 这样的金属氧化物会存在于热系外行星的大气中.
研究的目的:
- 在热木星系外行星WASP-19b的大气中检测氧化 (TiO).
- 探究太阳系外行星大气层的组成,
- 确认其他大气物种和雾的存在.
主要方法:
- 外行星WASP-19b在过境期间的传输光谱.
- 广泛覆盖的综合频谱的分析.
- 通过大气模型来解释光谱数据.
主要成果:
- 在WASP-19b的大气中检测到氧化 (TiO),可靠度为7.7σ.
- 强散射雾 (7.4σ) 和 (3.4σ) 的识别.
- 证实系外行星大气中的水 (7.9σ).
结论:
- 在热木星WASP-19b的大气中存在氧化 (TiO).
- 这种检测证明了在系外行星大气中识别更重的分子的能力.
- 这些发现有助于了解太阳系外行星的大气组成和热反转.
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