Universität zu Köln

Pabst, C., Higgins, R., Goicoechea, J. R., Teyssier, D., Berne, O., Chambers, E., Wolfire, M., Suri, S. T., Guesten, R., Stutzki, J., Graf, U. U., Risacher, C. and Tielens, A. G. G. M. (2019). Disruption of the Orion molecular core 1 by wind from the massive star theta(1) Orionis C. Nature, 565 (7741). S. 618 - 634. LONDON: NATURE PUBLISHING GROUP. ISSN 1476-4687

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Abstract

Massive stars inject mechanical and radiative energy into the surrounding environment, which stirs it up, heats the gas, produces cloud and intercloud phases in the interstellar medium, and disrupts molecular clouds (the birth sites of new stars(1,2)). Stellar winds, supernova explosions and ionization by ultraviolet photons control the lifetimes of molecular clouds(3-7). Theoretical studies predict that momentum injection by radiation should dominate that by stellar winds(8), but this has been difficult to assess observationally. Velocity-resolved large-scale images in the fine-structure line of ionized carbon ([C II]) provide an observational diagnostic for the radiative energy input and the dynamics of the interstellar medium around massive stars. Here we report observations of a one-square-degree region (about 7 parsecs in diameter) of Orion molecular core 1-the region nearest to Earth that exhibits massive-star formation-at a resolution of 16 arcseconds (0.03 parsecs) in the [C II] line at 1.9 terahertz (158 micrometres). The results reveal that the stellar wind originating from the massive star theta(1) Orionis C has swept up the surrounding material to create a 'bubble' roughly four parsecs in diameter with a 2,600-solar-mass shell, which is expanding at 13 kilometres per second. This finding demonstrates that the mechanical energy from the stellar wind is converted very efficiently into kinetic energy of the shell and causes more disruption of the Orion molecular core 1 than do photo-ionization and evaporation or future supernova explosions.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Pabst, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Higgins, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Goicoechea, J. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Teyssier, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Berne, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chambers, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wolfire, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Suri, S. T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Guesten, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stutzki, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Graf, U. U. UNSPECIFIED UNSPECIFIED UNSPECIFIED Risacher, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tielens, A. G. G. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-158732
DOI:	10.1038/s41586-018-0844-1
Journal or Publication Title:	Nature
Volume:	565
Number:	7741
Page Range:	S. 618 - 634
Date:	2019
Publisher:	NATURE PUBLISHING GROUP
Place of Publication:	LONDON
ISSN:	1476-4687
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language INTERSTELLAR-MEDIUM; STELLAR WINDS; PHOTODISSOCIATION REGIONS; SILCC PROJECT; O STARS; EXTINCTION; NEBULA; RADIATION; EMISSION; IMPACT Multiple languages Multidisciplinary Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15873