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Date and Time of the Query: 2019-05-24 T05:48:45 PDT
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For refcode 2005A&A...432..475D:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2005A&A...432..475D Neutral hydrogen gas in 7 high-inclination spiral galaxies I. The data M. Dahlem, M. Ehle, S. D. Ryder, M. Vlajic and R. F. Haynes Received 16 July 2004 / Accepted 16 November 2004 High-sensitivity interferometric H I line observations of a small sample of seven galaxies with limiting column densities of a fewtimes 10^19^ cm^-2^ are presented. A tilted ring model fitting routine was used to determine some global characteristics of the H I distribution and kinematics in the galaxy disks. 4 of the 7 galaxies have low maximum rotation velocities of ~< 125 km s^-1^, indicating that they are low-mass systems.Visual inspection shows that at least one galaxy, NGC 4700, exhibits signs of extraplanar H I emission. An in-depth search for H I gas in the galaxy halos and the determination of halo gas properties, based on three-dimensional modeling, will follow in a separate publication. Companion galaxies were detected in H I line emission near 3 ofthe 7 sample galaxies: NGC 1511, NGC 4565 and NGC 4700.One of these, NGC 1511, is found to be strongly interacting and is therefore not suitable for a study of the dependence of its halo properties on the level of star formation activity in the underlying disk. In the case of NGC 4700 the companion galaxy has no visibleinfluence on its gas kinematics, while NGC 4565 might be affected by its interaction with two small companions. Keywords: ISM: general, galaxies: ISM, galaxies: evolution, galaxies: halos, galaxies: starburst, galaxies: kinematics and dynamics
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