JWST 观察 PDS 70 内部圆盘

IF 12.9 1区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Nature Astronomy Pub Date : 2024-09-12 DOI:10.1038/s41550-024-02378-6

Luca Maltagliati

引用次数: 0

摘要

PDS 70 是行星形成方面最令人感兴趣的天体之一，它的尘埃圆盘结构严谨，在其 20 和 34 au 的间隙中嵌入了两颗巨大的吸积原行星。作者分析了 JWST/MIRI 的数据，并将其与 15 年前斯皮策的档案观测数据进行了比较，这些数据在大约 5 和 27 µm 之间重叠。这两个光谱显示出相似的形状，都有一个很强的 10 µm 硅酸盐带和 16 µm 和 19 µm 的沸石带，另外在 23 µm 处还有一个较弱的特征，这在 MIRI 数据中尤为明显。不过，它们显示出明显的通量变化：如果 10 µm 波长峰值的强度与 Spitzer 的 19 µm 波长峰值相似，那么在 MIRI 中则几乎是后者的两倍。然后利用尘埃连续套件（DuCK）拟合模型来确定内盘尘埃的矿物成分。温度在 350 至 500 K 之间、铁含量约为 10%的暖无定形富镁硅酸盐占主导地位，但未检测到其他各种内盘的重要成分--磷灰石。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

A JWST look at the inner PDS 70 disc

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Nature Astronomy Physics and Astronomy-Astronomy and Astrophysics

CiteScore

19.50

自引率

2.80%

发文量

252

期刊介绍： Nature Astronomy, the oldest science, has played a significant role in the history of Nature. Throughout the years, pioneering discoveries such as the first quasar, exoplanet, and understanding of spiral nebulae have been reported in the journal. With the introduction of Nature Astronomy, the field now receives expanded coverage, welcoming research in astronomy, astrophysics, and planetary science. The primary objective is to encourage closer collaboration among researchers in these related areas. Similar to other journals under the Nature brand, Nature Astronomy boasts a devoted team of professional editors, ensuring fairness and rigorous peer-review processes. The journal maintains high standards in copy-editing and production, ensuring timely publication and editorial independence. In addition to original research, Nature Astronomy publishes a wide range of content, including Comments, Reviews, News and Views, Features, and Correspondence. This diverse collection covers various disciplines within astronomy and includes contributions from a diverse range of voices.