Measuring the Potential Time Variation of the Fine-structure Constant Using LAMOST Quasar Spectra
This research paper investigates the potential time variation of the fine-structure constant (α) using spectra from the Large Sky Area Multi-object Fiber Spectroscopic Telescope (LAMOST) quasar survey, finding no significant evidence for variation and corroborating previous findings from SDSS data.
ALMA-CRISTAL Survey: 적색편이 z=4-6에서 별 형성 은하의 [CII] 방출선 공간적 범위 연구
본 연구는 고 적색편이 은하에서 [CII] 방출선의 공간적 범위가 자외선 및 원적외선 연속체 방출보다 더 넓게 확장되어 있으며, 이는 별 형성 활동과 관련된 광해리 영역뿐만 아니라 확산 중성 매질 및 과거 병합 사건의 영향을 반영할 수 있음을 시사합니다.
ALMA-CRISTALサーベイ: z=4-6における星形成銀河の[CII]輝線の空間的広がり
z=4-6における星形成銀河において、[CII]輝線放射領域は、星形成活動の主要なトレーサーと考えられている紫外線および遠赤外線連続体放射領域よりも空間的に広がっており、その要因として、星形成活動に加えて、拡散中性媒質(原子ガス)の寄与や過去の合体イベントの影響が考えられる。
The ALMA-CRISTAL Survey: Measuring the Size of [CII] Line Emission in Star-Forming Galaxies at Redshift 4-6
Star-forming galaxies at redshifts 4-6 exhibit extended [CII] line emission, exceeding the spatial extent of their UV and FIR continuum emission, suggesting a significant contribution from diffuse neutral gas and potential influence of past mergers.
Synthetic Modeling of Polarized Dust Emission to Constrain Grain Alignment Mechanisms and Dust Properties in Intermediate-Mass Young Stellar Objects Using ALMA Polarization Data
Modeling polarized dust emission from young stellar objects (YSOs) suggests that micron-sized and larger dust grains must contain iron inclusions and experience inelastic relaxation to reproduce the high polarization degrees observed by ALMA. This indicates that grain composition and internal alignment mechanisms are crucial for understanding magnetic field structures in star-forming regions.
Detection of Extended Lyα Emission Around Quasar Pairs at z~3 Using VLT/MUSE
Observations of eight quasar pairs at z~3 reveal extended Lyα nebulae with asymmetric morphologies, suggesting that cool gas in the circumgalactic medium traces the large-scale structure of the universe and the cosmic web filaments.
利用 JWST 望遠鏡直接觀測兩個透鏡星系以限制其豐度
這篇文章展示了利用 JWST 望遠鏡和重力透鏡技術，可以直接測量遙遠星系中微弱的發射線，從而研究早期宇宙中星系的化學豐度和演化。
Direct Measurement of Gas-Phase Abundances in Two Lensed Lyman-Break Galaxies with JWST
This research leverages the capabilities of the JWST and gravitational lensing to directly measure the chemical abundances in two distant galaxies, providing insights into galactic evolution.
Galaxy-wide Outflow in a Compton-thick Quasar at z = 3.5: Insights from Emission and Absorption Analysis with JWST and VLT
The study reveals a powerful galaxy-wide outflow in the Compton-thick quasar GS133 at z = 3.5, providing insights into the feedback mechanisms of active galactic nuclei (AGN) through the analysis of both UV absorption and optical emission lines.
Grain Size Estimation in the Protostellar Disk of TMC-1A Using Multi-Wavelength Observations from ALMA and VLA
Multi-wavelength observations of the Class I protostar TMC-1A using ALMA and VLA reveal two possible grain size populations in the protostellar disk, suggesting either small grains (∼0.12 mm) potentially leading to gravitational instability or the presence of grown grains (∼4 mm) with implications for early planet formation.
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