Abstract
The SAURON integral field spectrograph was used to observe the central parts of the galaxy M100. We present here maps of Hβ emission and gas velocity dispersion. We focus on the discovery of a cold (low velocity dispersion) ring of gas, coinciding spatially with enhanced massive star formation as indicated here by Hβ emission and outlining the well known nuclear (pseudo) ring. Our SAURON fields also cover the dustlanes visible in M100’s bar. Here we see cold gas and star formation offset from the leading edge of the dustlanes, indicative of the presence of shocks. This is further strong evidence that the nuclear ring of star formation is formed at the location of the Inner Lindblad resonance(s), fuelled by gas channelled inwards along the dustlanes through shocks.
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Allard, E., Peletier, R., Knapen, J. (2007). A COOL GAS RING IN M100. In: DE JONG, R. (eds) ISLAND UNIVERSES. Astrophysics and Space Science Proceedings. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-5573-7_34
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DOI: https://doi.org/10.1007/978-1-4020-5573-7_34
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