Universität zu Köln

Fayolle, Edith C., Oberg, Karin I., Jorgensen, Jes K., Altwegg, Kathrin, Calcutt, Hannah ORCID: 0000-0003-3393-294X, Mueller, Holger S. P., Rubin, Martin ORCID: 0000-0001-6549-3318, van der Wiel, Matthijs H. D., Bjerkeli, Per ORCID: 0000-0002-7993-4118, Bourke, Tyler L., Coutens, Audrey ORCID: 0000-0003-1805-3920, van Dishoeck, Ewine F., Drozdovskaya, Maria N., Garrod, Robin T., Ligterink, Niels F. W., Persson, Magnus V. and Wampfler, Susanne F. (2017). Protostellar and cometary detections of organohalogens. Nat. Astron., 1 (10). S. 703 - 709. LONDON: NATURE PUBLISHING GROUP. ISSN 2397-3366

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Abstract

Organohalogens, a class of molecules that contain at least one halogen atom bonded to carbon, are abundant on the Earth where they are mainly produced through industrial and biological processes(1). Consequently, they have been proposed as biomarkers in the search for life on exoplanets(2). Simple halogen hydrides have been detected in interstellar sources and in comets, but the presence and possible incorporation of more complex halogen-containing molecules such as organohalogens into planet-forming regions is uncertain(3,4). Here we report the interstellar detection of two isotopologues of the organohalogen CH3Cl and put some constraints on CH3F in the gas surrounding the low-mass protostar IRAS 16293-2422, using the Atacama Large Millimeter/submillimeter Array (ALMA). We also find CH3Cl in the coma of comet 67P/Churyumov-Gerasimenko (67P/C-G) by using the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) instrument. The detections reveal an efficient pre-planetary formation pathway of organohalogens. Cometary impacts may deliver these species to young planets and should thus be included as a potential abiotical production source when interpreting future organohalogen detections in atmospheres of rocky planets.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Fayolle, Edith C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Oberg, Karin I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jorgensen, Jes K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Altwegg, Kathrin UNSPECIFIED UNSPECIFIED UNSPECIFIED Calcutt, Hannah UNSPECIFIED orcid.org/0000-0003-3393-294X UNSPECIFIED Mueller, Holger S. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rubin, Martin UNSPECIFIED orcid.org/0000-0001-6549-3318 UNSPECIFIED van der Wiel, Matthijs H. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bjerkeli, Per UNSPECIFIED orcid.org/0000-0002-7993-4118 UNSPECIFIED Bourke, Tyler L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Coutens, Audrey UNSPECIFIED orcid.org/0000-0003-1805-3920 UNSPECIFIED van Dishoeck, Ewine F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Drozdovskaya, Maria N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Garrod, Robin T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ligterink, Niels F. W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Persson, Magnus V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wampfler, Susanne F. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-216906
DOI:	10.1038/s41550-017-0237-7
Journal or Publication Title:	Nat. Astron.
Volume:	1
Number:	10
Page Range:	S. 703 - 709
Date:	2017
Publisher:	NATURE PUBLISHING GROUP
Place of Publication:	LONDON
ISSN:	2397-3366
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language STAR-FORMATION; IRAS-16293-2422; DISCOVERY; SPECTRUM; FLUORIDE; CHLORIDE; INSIGHT; PLANETS; CLOUDS; RATIOS Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/21690