Molecular Emission and Absorption in Low-Mass Protostars Observed with the James Webb Space Telescope
The JWST/MIRI-MRS observations reveal a remarkable richness in molecular features across the mid-infrared wavelength range, tracing various warm components in young protostellar systems, from the hot core regions to shocks in the outflows and disk winds. The typical temperatures of the gas-phase molecules of 100-300 K are consistent with both ice sublimation in hot cores as well as high-temperature gas phase chemistry.
中間質量ブラックホストの宿主銀河の光学分光学: 中心ブラックホールの進化
中間質量ブラックホールとその低質量超大質量ブラックホールの対応物は、その宿主銀河と必ずしも共進化しておらず、超エディントン降着が主要な成長メカニズムであることを示唆している。
An All-Sky Metallicity Catalogue Based on Gaia DR3 Spectro-Photometry and the Pristine Survey
The authors have created an all-sky metallicity catalogue by combining Gaia DR3 spectro-photometric information and data from the Pristine narrow-band photometric survey, providing accurate metallicity estimates down to [Fe/H] ∼ -3.5.
Criteria for Identifying and Evaluating Locations for the Cosmic Explorer Gravitational-Wave Observatories
The Cosmic Explorer project is developing criteria to identify and evaluate locations that could potentially host its next-generation gravitational-wave observatories in the United States, considering scientific performance, cost boundaries, and social factors.
Aligned Orbit and Atmospheric Composition of the Hot Jupiter WASP-122b (KELT-14b) Revealed by ESPRESSO Observations
The hot Jupiter WASP-122b (KELT-14b) has an aligned orbit and shows no significant absorption features from atomic or molecular species in its atmosphere.
2024年二元系統中δ Sct型脈動星的目錄
本文介紹了目前最大規模的δ Sct型脈動星在二元系統中的目錄,並分析了這些脈動星的統計特性和相關關係。
Detailed Analysis of Five Candidate Delta Scuti-type Pulsators in Detached Eclipsing Binary Systems
Comprehensive photometric and spectroscopic analysis of five candidate delta Scuti-type pulsators in detached eclipsing binary systems to obtain precise stellar parameters and study the pulsation properties.
No Evidence of Transits Around Barnard's Star in TESS Photometry
Current TESS photometry of Barnard's star does not show any evidence of transits for the recently discovered sub-Earth-mass planet Barnard b.
M83の拡張紫外線ディスクにおける高励起コンパクトな分子クランプ
M83の拡張紫外線ディスクの分子雲は、高密度の星形成クランプを中心に持つ構造を持っている。これらのクランプは、低金属量環境でも CO分子が保護されており、CO(3-2)輝線を強く放射している。
基於JWST NIRCam/光譜觀測的前2Gyr銀河形成歷程:z~4-6.5的H{\alpha}亮度函數
利用JWST NIRCam/光譜觀測,我們在z~4-6.6範圍內發現了1,013個H{\alpha}發射星系,並計算了z~4.45、5.30和6.15三個紅移區間的H{\alpha}亮度函數。這些是首次利用純光譜數據獲得的z>3的H{\alpha}亮度函數,為研究早期銀河形成提供了新的觀測依據。
© 2024 by Linnk AI