Urquhart, J.S., Wells, M. R. A., Pillai, T., Leurini, S., Giannetti, A., Moore, T. J. T., Thompson, M. A., Figura, C., Colombo, D., Yang, A. Y., and others. (2022) ATLASGAL – Evolutionary trends in high-mass star formation. Monthly Notices of the Royal Astronomical Society, 510 (3). pp. 3389-3407. ISSN 0035-8711. (doi:10.1093/mnras/stab3511) (KAR id:92213)
PDF
Author's Accepted Manuscript
Language: English |
|
Download this file (PDF/1MB) |
Preview |
Request a format suitable for use with assistive technology e.g. a screenreader | |
Official URL: https://doi.org/10.1093/mnras%2Fstab3511 |
Abstract
ATLASGAL is a 870-μm dust survey of 420 square degrees of the inner Galactic plane and has been used to identify ∼10 000 dense molecular clumps. Dedicated follow-up observations and complementary surveys are used to characterise the physical properties of these clumps, map their Galactic distribution and investigate the evolutionary sequence for high-mass star formation. The analysis of the ATLASGAL data is ongoing: we present an up-to-date version of the catalogue. We have classified 5007 clumps into four evolutionary stages (quiescent, protostellar, young stellar objects and H II regions) and find similar numbers of clumps in each stage, suggesting a similar lifetime. The luminosity-to-mass (Lbol/Mfwhm) ratio curve shows a smooth distribution with no significant kinks or discontinuities when compared to the mean values for evolutionary stages indicating that the star-formation process is continuous and that the observational stages do not represent fundamentally different stages or changes in the physical mechanisms involved. We compare the evolutionary sample with other star-formation tracers (methanol and water masers, extended green objects and molecular outflows) and find that the association rates with these increases as a function of evolutionary stage, confirming that our clasfication is reliable. This also reveals a high association rate between quiescent sources and molecular outflows, revealing that outflows are the earliest indication that star formation has begun and that star formation is already ongoing in many of the clumps that are dark even at 70 μm.
Item Type: | Article |
---|---|
DOI/Identification number: | 10.1093/mnras/stab3511 |
Uncontrolled keywords: | Surveys: Astronomical Data bases, ISM: evolution, submillimetre: ISM, stars: Formation, stars: early-type, Galaxy: kinematics and dynamics |
Subjects: | Q Science |
Divisions: | Divisions > Division of Natural Sciences > Physics and Astronomy |
Depositing User: | James Urquhart |
Date Deposited: | 08 Dec 2021 13:08 UTC |
Last Modified: | 22 Apr 2022 15:18 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/92213 (The current URI for this page, for reference purposes) |
- Link to SensusAccess
- Export to:
- RefWorks
- EPrints3 XML
- BibTeX
- CSV
- Depositors only (login required):