EDP Sciences Journals List
Advanced Search
Subscriber Authentication Point
Home All issues Volume 398/2 Article
Free access article

Issue A&A
Volume 398, Number 2, February I 2003
Page(s) L11 - L13
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20021849



A&A 398, L11-L13 (2003)
DOI: 10.1051/0004-6361:20021849

Letter

The millimeter-wave spectrum and the dipole moment of vinylacetylene

S. Thorwirth and H. Lichau

I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
(Received 20 November 2002 / Accepted 15 December 2002 )

Abstract
The pure rotational spectrum of the hydrocarbon vinylacetylene (1-butene-3-yne, ${\rm H_2C=CH-C\equiv CH}$) in its ground vibrational state has been investigated from 80 to 165 GHz, covering the rotational quantum numbers $ 8 \le J \le 18 $ and $ 0 \le K_{a} \le 17 $, in order to provide accurate rest frequencies for radioastronomical searches. Moreover, quantum chemical calculations of the dipole moment components  $\mu_{a}$ and  $\mu_{b}$ have been performed leading to the result $\mu_{a}\approx0.4$ D. The value for the dipole moment component  $\mu_{b}$ is very low and lies in the range of several thousandth to a few hundredth of a Debeye.


Key words: molecular data -- methods: laboratory -- techniques: spectroscopic -- stars: AGB and post-AGB

Offprint request: S. Thorwirth, sven@ph1.uni-koeln.de


Tables at the CDS



© ESO 2003


What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.
  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.