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- W2140460695 abstract "We present the first detection of molecular gas in the Cartwheel, the prototype of a collisional ring galaxy formed in the head-on encounter of two galaxies. Until now, only very little atomic gas and no CO had been detected in the centre, where gas is theoretically expected to pile up. Using the Swedish ESO Submm Telescope, we detected both 12CO(1-0) and (2-1) line emission towards the central position. The line ratio and the line widths suggest that the CO(2--1) emission is sub-thermal and that the CO(1-0) emission arises within the central 22'' (13 kpc); it is probably associated with the inner ring and nucleus. We infer a mass of molecular gas (H2) of 1.5 to 6 10^9 M_sol, which is significantly higher than the approx. 10^8 M_sol of atomic gas within that region. The low excitation of the gas, whether it is due to a low temperature or a low density, is consistent with the weak star-forming activity observed in the centre of the Cartwheel." @default.
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- W2140460695 date "1998-11-09" @default.
- W2140460695 modified "2023-09-27" @default.
- W2140460695 title "Molecular Gas in The Cartwheel Galaxy" @default.
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