2010
DOI: 10.1111/j.1365-2966.2010.17906.x
|View full text |Cite
|
Sign up to set email alerts
|

Vertical gradients of azimuthal velocity in a global thin-disc model of spiral galaxies NGC 2403, NGC 4559, NGC 4302 and NGC 5775

Abstract: We estimate the vertical gradient of rotational velocity for several spiral galaxies in the framework of a global thin‐disc model, using the approximation of quasi‐circular orbits. We obtain gradients having a broad range of values, in agreement with measurements, for galaxies with both low and high gradients. To model the gradient, it suffices to know the rotation curve only. We illustrate, using the example of galaxy NGC 4302 with particularly high gradients, that mass models of galactic rotation curves that… Show more

Help me understand this report
View preprint versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1

Citation Types

0
4
0

Year Published

2012
2012
2020
2020

Publication Types

Select...
6

Relationship

3
3

Authors

Journals

citations
Cited by 6 publications
(4 citation statements)
references
References 11 publications
0
4
0
Order By: Relevance
“…We recently applied our gradient estimation method to six galaxies with available measurements of the vertical gradient of rotation (Jalocha et al 2010; Jałocha et al 2011). We found our predictions of the gradient value to agree within error bars with measurements.…”
Section: Vertical Gradient Of Rotation and Magnetic Fieldmentioning
confidence: 99%
“…We recently applied our gradient estimation method to six galaxies with available measurements of the vertical gradient of rotation (Jalocha et al 2010; Jałocha et al 2011). We found our predictions of the gradient value to agree within error bars with measurements.…”
Section: Vertical Gradient Of Rotation and Magnetic Fieldmentioning
confidence: 99%
“…In the present paper we use microlensing measurements to constrain the disk width and we compare the resulting vertical gradient predictions with the gradient measurements. In our several previous studies, e.g., Jałocha et al (2010Jałocha et al ( , 2011, we modelled spiral galaxies in the approximation of an infinitesimally thin disk. In this framework, we could easily obtain high values of the vertical gradient of rotation, in accord with gradient measurements.…”
Section: Introductionmentioning
confidence: 99%
“…In our several previous studies, e.g., Jałocha et al (2010Jałocha et al ( , 2011, we modeled spiral galaxies in the approximation of an infinitesimally thin disk. In this framework, we easily obtained high values of the vertical gradient of rotation, in accord with gradient measurements.…”
Section: Introductionmentioning
confidence: 99%
“…Yet, because galactic differential rotation probably decreases with distance from the midplane (e.g., Levine et al 2008;Marasco & Fraternali 2011;Jałocha et al 2011, and references therein), we expect field lines to become less tightly wound up, and hence to have a larger pitch angle, at higher altitudes. Note that this is just a qualitative argument, and one should not try to directly link the vertical variation of the pitch angle to that of the rotational velocity.…”
Section: Generalization To Z-dependent Pitch Anglesmentioning
confidence: 99%