Towards a multi-tracer timeline of star formation in the LMC -- I.\ Deriving the lifetimes of H\,{\sc i} clouds
| العنوان: | Towards a multi-tracer timeline of star formation in the LMC -- I.\ Deriving the lifetimes of H\,{\sc i} clouds |
|---|---|
| المؤلفون: | Alexander P. S. Hygate, Jacob L. Ward, J. M. Diederik Kruijssen, Steven N. Longmore, Mélanie Chevance, Andreas Schruba |
| بيانات النشر: | Oxford University Press |
| مصطلحات موضوعية: | Uncertainty principle, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Empirical determination, 01 natural sciences, 7. Clean energy, Phase change, 0103 physical sciences, Gravitational collapse, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, QC, QB, Physics, 010308 nuclear & particles physics, Star formation, Molecular cloud, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Interstellar medium, Formalism (philosophy of mathematics), 13. Climate action, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA) |
| الوصف: | The time-scales associated with the various stages of the star formation process remain poorly constrained. This includes the earliest phases of star formation, during which molecular clouds condense out of the atomic interstellar medium. We present the first in a series of papers with the ultimate goal of compiling the first multi-tracer timeline of star formation, through a comprehensive set of evolutionary phases from atomic gas clouds to unembedded young stellar populations. In this paper, we present an empirical determination of the lifetime of atomic clouds using the Uncertainty Principle for Star Formation formalism, based on the de-correlation of H$\alpha$ and H\,{\sc i} emission as a function of spatial scale. We find an atomic gas cloud lifetime of 48$\substack{+13\\-8}$\,Myr. This timescale is consistent with the predicted average atomic cloud lifetime in the LMC (based on galactic dynamics) that is dominated by the gravitational collapse of the mid-plane ISM. We also determine the overlap time-scale for which both H\,{\sc i} and H$\alpha$ emission are present to be very short ($t_{over} Comment: 17 pages, 8 figures. Accepted for publication in MNRAS |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0035-8711 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ada89f22ccb73252031e3224cb73005 https://researchonline.ljmu.ac.uk/id/eprint/13327/8/staa1977.pdf |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....1ada89f22ccb73252031e3224cb73005 |
| قاعدة البيانات: | OpenAIRE |
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