Universität zu Köln

Cernicharo, J., McCarthy, M. C., Gottlieb, C. A., Agundez, M., Prieto, L. Velilla, Baraban, J. H., Changala, P. B., Guelin, M., Kahane, C., Martin-Drumel, M. A., Patel, N. A., Reilly, N. J., Stanton, J. F., Quintana-Lacaci, G., Thorwirth, S. and Young, K. H. (2015). DISCOVERY OF SiCSi IN IRC+10216: A MISSING LINK BETWEEN GAS AND DUST CARRIERS OF Si-C BONDS. Astrophys. J. Lett., 806 (1). BRISTOL: IOP PUBLISHING LTD. ISSN 2041-8213

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Abstract

We report the discovery in space of a disilicon species, SiCSi, from observations between 80 and 350 GHz with the IRAM 30 m radio telescope. Owing to the close coordination between laboratory experiments and astrophysics, 112 lines have now been detected in the carbon-rich star CW Leo. The derived frequencies yield improved rotational and centrifugal distortion constants up to sixth order. From the line profiles and interferometric maps with the Submillimeter Array, the bulk of the SiCSi emission arises from a region of 6. in radius. The derived abundance is comparable to that of SiC2. As expected from chemical equilibrium calculations, SiCSi and SiC2 are the most abundant species harboring a Si-C bond in the dust formation zone and certainly both play a key role in the formation of SiC dust grains.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Cernicharo, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED McCarthy, M. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gottlieb, C. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Agundez, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Prieto, L. Velilla UNSPECIFIED UNSPECIFIED UNSPECIFIED Baraban, J. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Changala, P. B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Guelin, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kahane, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Martin-Drumel, M. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Patel, N. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Reilly, N. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stanton, J. F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Quintana-Lacaci, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Thorwirth, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Young, K. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-401164
DOI:	10.1088/2041-8205/806/1/L3
Journal or Publication Title:	Astrophys. J. Lett.
Volume:	806
Number:	1
Date:	2015
Publisher:	IOP PUBLISHING LTD
Place of Publication:	BRISTOL
ISSN:	2041-8213
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ASTRONOMICAL IDENTIFICATION; SUBMILLIMETER Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/40116