Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004mnras.353.1151s&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 353, Issue 4, pp. 1151-1160.
Astronomy and Astrophysics
Astronomy
2
Ism: Molecules, Galaxies: Seyfert, Radio Lines: Galaxies
Scientific paper
We have used the 15-m Swedish European Southern Observatory (ESO) Submillimetre Telescope (SEST) to observe the J= 1 -> 0 and J= 2 -> 1 transition lines of CO in 30 Southern hemisphere Seyfert galaxies from the extended 12-μm sample of Rush, Malkan & Spinoglio. We detected CO J= 1 -> 0 in 16 out of the 30 Seyfert galaxies and CO J= 2 -> 1 in 17 out of the 30 Seyfert galaxies. From the observed spectra, various CO gas properties have been derived including the luminosity of the CO gas and, using a standard conversion factor, the H2 mass. The average H2 gas mass for Seyfert 1 galaxies was 3 × 109 Msolar for CO J= 1 -> 0 and 1 × 109 Msolar for CO J= 2 -> 1, while in comparison the H2 gas mass for Seyfert 2 type galaxies was 11 × 109 Msolar for CO J= 1 -> 0 and 3 × 109 MsolarCO J= 2 -> 1. From this small sample of Seyfert galaxies, we tentatively support the conclusion that type 2 Seyfert galaxies contain more molecular gas than their type 1 counterparts.
Aalto Susanne
Beswick Rob J.
Booth Roy
Curran Stephen
Pedlar Alan
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