Abstract
The origin of Hi at anomalous velocities and at large distances above the disk, detected in a few spiral galaxies, is still a puzzle. To improve on our understanding of this extra-planar gas, we have started a study of a representative sample of nearby edge-on galaxies. In this paper we present the observations and a preliminary analysis of the extra-planar gas of UGC 1281 and NGC 7814. These galaxies were observed with the WSRT for 4 × 12 hours. In the dwarf galaxy UGC 1281, there are clear indications of a gaseous halo. A preliminary analysis of NGC 7814 shows no halo; however, we have detected extra-planar gas, at velocities higher than the maximal rotational velocity, above and below the plane. The origin of this gas is unclear.
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Kamphuis, P., Peletier, R. F., Van Der Kruit, P. C., Oosterloo, T. A., & Sancisi, R. (2007). A study of extra-planar hi gas ngc 7814 and ugc 1281. In Astrophysics and Space Science Proceedings (Vol. 0, pp. 303–306). Springer Science and Business Media B.V. https://doi.org/10.1007/978-1-4020-5573-7_51
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