期刊論文

學年 114
學期 2
出版（發表）日期 2026-02-10
作品名稱 Duration and properties of the embedded phase of star formation in 37 nearby galaxies from PHANGS-JWST
作品名稱（其他語言）
著者 Lise Ramambason; Mélanie Chevance; Jaeyeon Kim; Francesco Belfiore; J. M. Diederik Kruijssen; Andrea Romanelli; Amirnezam Amiri; Médéric Boquien; Ryan Chown; Daniel A. Dale; Simthembile Dlamini; Oleg V. Egorov; Ivan Gerasimov; Simon C. O. Glover; Kathryn Grasha; Hamid Hassani; Hwihyun Kim; Kathryn Kreckel; Hannah Koziol; Adam K. Leroy; José Eduardo Méndez-Delgado; Justus Neumann; Lukas Neumann; Hsi-An Pan; Debosmita Pathak; Karin Sandstrom; Sumit K. Sarbadhicary; Eva Schinnerer; Jiayi Sun; Jessica Sutter; David A. Thilker; Leonardo Ubeda; Tony D. Weinbeck; Bradley C. Whitmore; Thomas G. Williams
單位
出版者
著錄名稱、卷期、頁數 Astronomy & Astrophysics 706(A186) , p. 27
摘要 Light reprocessed by dust grains emitting in the infrared enables the study of the physics at play in dusty embedded regions, where ultraviolet and optical wavelengths are attenuated. Infrared telescopes such as JWST have made it possible to study the earliest feedback phases, when stars are shielded by cocoons of gas and dust. Comprehending this phase is crucial for unravelling the effects of feedback from young stars that leads to their emergence and the dispersal of their host molecular clouds. Here we show that the transition from the embedded to the exposed phase of star formation is short (< 4 Myr) and sometimes almost absent (< 1 Myr) across a sample of 37 nearby star-forming galaxies covering a wide range of morphologies, from massive barred spirals to irregular dwarfs. The short duration of the dust-clearing timescales suggests a predominant role of pre-supernova feedback mechanisms in revealing newborn stars, confirming previous results on smaller samples and allowing, for the first time, a statistical analysis of their dependencies. We find that the timescales associated with mid-infrared emission at 21 μm, tracing a dust-embedded feedback phase, are controlled by a complex interplay between giant molecular cloud properties (masses and velocity dispersions) and galaxy morphology. We report relatively longer durations of the embedded phase of star formation in barred spiral galaxies, while this phase is significantly reduced in low-mass irregular dwarf galaxies. We discuss tentative trends with gas-phase metallicity, which may favor faster cloud dispersal at low metallicities.
關鍵字 methods: statistical; ISM: clouds; dust; extinction; galaxies: star formation; infrared: ISM
語言 en
ISSN
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 是
國別 DEU
公開徵稿
出版型式 ,電子版
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/129218 )