SIMBAD references

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 H₂mass. The average H₂gas mass for Seyfert 1 galaxies was 3x10⁹ M_☉for CO J= 1 ⟶ 0 and 1x10⁹ M_☉ for CO J= 2 ⟶ 1, while in comparison the H₂gas mass for Seyfert 2 type galaxies was 11x10⁹ M_☉for CO J= 1 ⟶ 0 and 3x10⁹ M_☉CO 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.