Vertical Velocity Dispersion of the Ionized Gas In NGC 3938

Bibcode
2001Ap&SS.276..445J
DOI
10.1023/A:1017559619544
Jimenez-Vicente, J.; Battaner, E.; Porcel, C.; Rozas, M.; Castañeda, H.
Bibliographical reference

Astrophysics and Space Science, v. 276, Issue 2/4, p. 445-449 (2001).

Advertised on:
3
2001
Journal
Astrophysics and Space Science
Number of authors
5
IAC number of authors
1
Citations
0
Refereed citations
0
Description
We have studied the kinematics of the ionized gas in the nearly face-on galaxy NGC 3938 by means of observations made with the Fabry-Perot interferometer TAURUS II at the William Herschel Telescope, using the H_α line. We have been able to produce high-resolution velocity and velocity-dispersion maps which allow us to make a detailed study of the kinematics of the ionized gas. In particular we have found that the vertical velocity dispersion is constant with galactocentric radius, as has already been found for the atomic and molecular gas in this galaxy. This suggests the existence of several heating mechanisms in the disc acting simultaneously to produce the observed behaviour.
Type
Non-refereed

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