通過分析不同甲烷和水蒸氣豐度下,在可見光和近紅外波段的可探測性,該研究強調了系外行星大氣特徵描述中考慮這兩種物質之間相互影響的重要性。
The protoplanet PDS 70b possesses a carbon-to-oxygen (C/O) ratio similar to its host star, potentially indicating formation primarily from dust and ice aggregates rather than gas, or a late-stage carbon enrichment of the protoplanetary disk.
This research utilizes JWST/MIRI mid-infrared observations to characterize the atmosphere of the exoplanet HD 95086 b and analyze the structure of its circumstellar disk, revealing new insights into the system's properties and the challenges of mid-infrared observations.
The detectability of polycyclic aromatic hydrocarbons (PAHs) in exoplanet atmospheres is significantly influenced by planetary conditions, with planets having temperatures around 1200 K, C/O ratio of 0.55, and solar metallicity being the most promising targets for future observations using JWST.
The first broadband near- to mid-infrared transmission spectrum of the hot super-Earth L 168-9 b, obtained using JWST NIRSpec and MIRI instruments, does not show definitive evidence of atmospheric features but rules out atmospheric metallicities less than 100x solar, suggesting the planet may have lost its primordial hydrogen/helium atmosphere early in its lifetime.
Stellar contamination significantly impacts the analysis of exoplanet atmospheres, often leading to misinterpretations of atmospheric composition and temperature, particularly when using data from instruments lacking optical and UV coverage.
This research paper presents evidence of stellar faculae contaminating the transmission spectrum of exoplanet WASP-69b and highlights the importance of accounting for stellar activity when interpreting exoplanet atmospheric data.
本研究展示了利用喜馬拉雅二米錢德拉望遠鏡上的喜馬拉雅暗天體光譜儀和相機 (HFOSC) 對三顆熱木星進行低分辨率凌日光譜觀測的可行性,並證明了 HFOSC 與紅外觀測數據結合可以更好地約束系外行星大氣參數。
This research demonstrates the capability of the 2m Himalayan Chandra Telescope (HCT) for conducting low-resolution transit spectroscopy of exoplanets, revealing atmospheric characteristics of three hot Jupiters: HAT-P-1b, WASP-127b, and KELT-18b.
본 연구는 HST의 WFC3/UVIS G280 관측 모드를 사용하여 뜨거운 목성 WASP-127b의 자외선에서 근적외선까지의 투과 스펙트럼을 분석하여 대기 에어로졸의 특성과 나트륨 존재 여부를 규명하고자 한다.