SIMBAD references

2005A&A...432..475D - Astronomy and Astrophysics, volume 432, 475-489 (2005/3-3)

Neutral hydrogen gas in 7 high-inclination spiral galaxies. I. The data.

DAHLEM M., EHLE M., RYDER S.D., VLAJIC M. and HAYNES R.F.

Abstract (from CDS):

High-sensitivity interferometric HI line observations of a small sample of seven galaxies with limiting column densities of a few times 1019cm–2 are presented. A tilted ring model fitting routine was used to determine some global characteristics of the HI distribution and kinematics in the galaxy disks. 4 of the 7 galaxies have low maximum rotation velocities of ≲125km/s, indicating that they are low-mass systems. Visual inspection shows that at least one galaxy, NGC 4700, exhibits signs of extraplanar HI emission. An in-depth search for HI 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 HI line emission near 3 of the 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 visible influence on its gas kinematics, while NGC 4565 might be affected by its interaction with two small companions.

Abstract Copyright:

Journal keyword(s): ISM: general - galaxies: ISM - galaxies: evolution - galaxies: halos - galaxies: starburst - galaxies: kinematics and dynamics

CDS comments: p.476 1934-638 = RORF 1934-638, 0252-712 = RORF 0252-712, 2117-642 = PKS 2117-642, 2311-452 = RORF 2311-452, p.477 0416-188 = RORF 0414-1 89, 1246-075 = RORF 1243-072

Simbad objects: 31

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