| Issue |
EAS Publications Series
Volume 56, 2012
The Role of the Disk-Halo Interaction in Galaxy Evolution: Outflow vs. Infall?
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|---|---|---|
| Page(s) | 327 - 330 | |
| Section | The Active Disk-Halo Connection: Infall vs. Outflows | |
| DOI | https://doi.org/10.1051/eas/1256054 | |
| Published online | 17 September 2012 | |
The Role of the Disk-Halo Interaction in Galaxy Evolution: Outflow vs. Infall?
Miguel A. de Avillez (ed)
EAS Publications Series, 56 (2012) 327–330
Miguel A. de Avillez (ed)
EAS Publications Series, 56 (2012) 327–330
Ionized gas in the Smith Cloud
Department of Astronomy, University of Wisconsin-Madison, Madison, WI, USA
We present WHAM observations of Hα, [N II], and [S II] in the Smith Cloud. A map of Hα emission from the cloud shows ionized gas coincident with the brightest H I emission, but nearly-as-bright Hα in some regions with faint H I. The ionized mass of the cloud is at least as large as the neutral mass, >106M⊙. Ionized gas in the core of the Smith Cloud has an electron temperature 6000 K < T < 16 000 K. The observed ratio [N II]/Hα = 0.39 ± 0.09 shows that the cloud has a non-primordial nitrogen abundance, 0.1 − 1× solar.
© EAS, EDP Sciences, 2012