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Fragmentation, rotation and outflows in the high-mass star-forming region IRAS 23033+5951: A case study of the IRAM NOEMA large program CORE

Bosco, F., Beuther, H., Ahmadi, A., Mottram, J.C., Kuiper, R., Linz, H., Maud, L., Winters, J.M., Henning, T., Feng, S., and others. (2019) Fragmentation, rotation and outflows in the high-mass star-forming region IRAS 23033+5951: A case study of the IRAM NOEMA large program CORE. Astronomy & Astrophysics, 629 . ISSN 2329-1273. (doi:10.1051/0004-6361/201935318)

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https://doi.org/10.1051/0004-6361/201935318

Abstract

Context. The formation process of high-mass stars (> 8 M�) is poorly constrained, particularly, the effects of clump fragmentation creating multiple

Aims. We study the fragmentation of dense gas clumps, and trace the circumstellar rotation and outflows by analyzing observations of the highmass (∼ 500 M�) star-forming region IRAS 23033+5951.

we probe the gas and dust emission at an angular resolution of ∼0.4500, corresponding to 1900 au.

higher peak intensity well above a signal-to-noise ratio of 100. Hierarchical fragmentation from large to small spatial scales is discussed. Two

cores are similar to Keplerian but are missing the highest velocity components close to the center of rotation, which is a common phenomena from

19 M�. Rotational temperatures from fitting CH3CN (12K − 11K) spectra are used for estimating the gas temperature and by that the disk stability

stellar object and considering different disk inclination angles, we identify only one candidate disk to be unstable against gravitational instability

Conclusions. The dominant sources cover different evolutionary stages within the same maternal gas clump. The appearance of rotation and

outflows of the cores are similar to those found in low-mass star-forming regions.

Item Type: Article
DOI/Identification number: 10.1051/0004-6361/201935318
Uncontrolled keywords: ISM: individual objects (IRAS 23033+5951) – ISM: kinematics and dynamics – ISM: jets and outflows – stars: circumstellar matter – stars: formation – stars: massive
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: James Urquhart
Date Deposited: 11 Jul 2019 14:09 UTC
Last Modified: 25 Sep 2019 14:45 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/75295 (The current URI for this page, for reference purposes)
Urquhart, J.S.: https://orcid.org/0000-0002-1605-8050
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