Universität zu Köln

Neufeld, David A., Goldsmith, Paul F., Comito, Claudia and Schmiedeke, Anika (2017). Search for Interstellar LiH in the Milky Way. Astrophys. J., 837 (1). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-4357

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Abstract

We report the results of a sensitive search for the 443.952902 GHz J = 1-0 transition of the lithium hydride (LiH) molecule toward two interstellar clouds in the Milky Way, W49N and Sgr B2 (Main), that has been carried out using the Atacama Pathfinder Experiment telescope. The results obtained toward W49N place an upper limit of 1.9 x 10(-11) (3 sigma) on the LiH abundance, N(LiH)/N(H-2), in a foreground, diffuse molecular cloud along the sight. line to W49N, corresponding to 0.5% of the solar system lithium abundance. Those obtained toward Sgr B2 (Main) place an abundance limit. N(LiH)/N(H-2) < 3.6 x 10(-13) (3 sigma) 13 in the dense gas within the Sgr B2 cloud itself. These limits are considerably smaller that those implied by the tentative detection of LiH reported previously for the z = 0.685 absorber toward B0218+357.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Neufeld, David A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Goldsmith, Paul F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Comito, Claudia UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmiedeke, Anika UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-237109
DOI:	10.3847/1538-4357/aa5ebd
Journal or Publication Title:	Astrophys. J.
Volume:	837
Number:	1
Date:	2017
Publisher:	IOP PUBLISHING LTD
Place of Publication:	BRISTOL
ISSN:	1538-4357
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language LITHIUM HYDRIDE; MOLECULAR CLOUD; EARLY UNIVERSE; SPECTROMETER; CONTINUUM; B0218+357; APEX; NAH Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/23710