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From clump to disc scales in W3 IRS4 : A case study of the IRAM NOEMA large programme CORE

Mottram, J. C., Beuther, H., Ahmadi, A., Klaassen, P. D., Beltrán, M. T., Csengeri, T., Feng, S., Gieser, C., Henning, Th., Johnston, K. G., and others. (2020) From clump to disc scales in W3 IRS4 : A case study of the IRAM NOEMA large programme CORE. Astronomy and Astrophysics, 636 . ISSN 0004-6361. (doi:10.1051/0004-6361/201834152) (KAR id:81729)

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Context. High-mass star formation typically takes place in a crowded environment, with a higher likelihood of young forming stars affecting and being affected by their surroundings and neighbours, as well as links between different physical scales affecting the outcome. However, observational studies are often focused on either clump or disc scales exclusively.

Methods. We present 1.4 mm continuum and molecular line observations with the IRAM NOEMA interferometer and 30 m telescope, which together probe spatial scales from ~0.3−20′′ (600−40 000 AU or 0.003−0.2 pc at 2 kpc, the distance to W3). As part of our analysis, we used XCLASS to constrain the temperature, column density, velocity, and line-width of the molecular emission lines.

Conclusions. CORE observations allow us to comprehensively link the different structures in the W3 IRS4 region for the first time. Our results argue that the dynamics and environment around the MYSO W3 IRS4 have a significant impact on its evolution. This context would be missing if only high resolution or continuum observations were available.

Item Type: Article
DOI/Identification number: 10.1051/0004-6361/201834152
Uncontrolled keywords: stars formation, stars protostars, HII regions, stars individual W3 IRS4, ISM kinematics and dynamics, ISM abundances
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: James Urquhart
Date Deposited: 16 Jun 2020 11:24 UTC
Last Modified: 18 Jun 2020 10:49 UTC
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