Universität zu Köln

Sewilo, Marta ORCID: 0000-0003-2248-6032, Indebetouw, Remy, Charnley, Steven B., Zahorecz, Sarolta ORCID: 0000-0001-6149-1278, Oliveira, Joana M., van Loon, Jacco Th., Ward, Jacob L., Chen, C. -H. Rosie, Wiseman, Jennifer, Fukui, Yasuo, Kawamura, Akiko, Meixner, Margaret, Onishi, Toshikazu and Schilke, Peter ORCID: 0000-0003-2141-5689 (2018). The Detection of Hot Cores and Complex Organic Molecules in the Large Magellanic Cloud. Astrophys. J. Lett., 853 (2). BRISTOL: IOP PUBLISHING LTD. ISSN 2041-8213

Full text not available from this repository.

Abstract

We report the first extragalactic detection of the complex organic molecules (COMs) dimethyl ether (CH3OCH3) and methyl formate (CH3OCHO) with the Atacama Large Millimeter/submillimeter Array (ALMA). These COMs, together with their parent species methanol (CH3OH), were detected toward two 1.3 mm continuum sources in the N 113 star-forming region in the low-metallicity Large Magellanic Cloud (LMC). Rotational temperatures (T-rot similar to 130 K) and total column densities (N-rot 10(16) cm(-2)) have been calculated for each source based on multiple transitions of CH3OH. We present the ALMA molecular emission maps for COMs and measured abundances for all detected species. The physical and chemical properties of two sources with COMs detection, and the association with H2O and OH maser emission, indicate that they are hot cores. The fractional abundances of COMs scaled by a factor of 2.5 to account for the lower metallicity in the LMC are comparable to those found at the lower end of the range in Galactic hot cores. Our results have important implications for studies of organic chemistry at higher redshift.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Sewilo, Marta UNSPECIFIED orcid.org/0000-0003-2248-6032 UNSPECIFIED Indebetouw, Remy UNSPECIFIED UNSPECIFIED UNSPECIFIED Charnley, Steven B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zahorecz, Sarolta UNSPECIFIED orcid.org/0000-0001-6149-1278 UNSPECIFIED Oliveira, Joana M. UNSPECIFIED UNSPECIFIED UNSPECIFIED van Loon, Jacco Th. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ward, Jacob L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chen, C. -H. Rosie UNSPECIFIED UNSPECIFIED UNSPECIFIED Wiseman, Jennifer UNSPECIFIED UNSPECIFIED UNSPECIFIED Fukui, Yasuo UNSPECIFIED UNSPECIFIED UNSPECIFIED Kawamura, Akiko UNSPECIFIED UNSPECIFIED UNSPECIFIED Meixner, Margaret UNSPECIFIED UNSPECIFIED UNSPECIFIED Onishi, Toshikazu UNSPECIFIED UNSPECIFIED UNSPECIFIED Schilke, Peter UNSPECIFIED orcid.org/0000-0003-2141-5689 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-197976
DOI:	10.3847/2041-8213/aaa079
Journal or Publication Title:	Astrophys. J. Lett.
Volume:	853
Number:	2
Date:	2018
Publisher:	IOP PUBLISHING LTD
Place of Publication:	BRISTOL
ISSN:	2041-8213
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics I
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language YOUNG STELLAR OBJECTS; INTERSTELLAR-MEDIUM; MASERS; EVOLUTION; REGIONS Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/19797