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Hydrodynamical Simulations of the Barred Spiral Galaxy NGC 1365

Published online by Cambridge University Press:  12 April 2016

P. A. B. Lindblad ,
P. O. Lindblad  and
E. Athanassoula
P. A. B. Lindblad
Affiliation:
Stockholm Observatory, S-133 36 Saltsjöbaden, Sweden
P. O. Lindblad
Affiliation:
Stockholm Observatory, S-133 36 Saltsjöbaden, Sweden
E. Athanassoula
Affiliation:
Observatoire de Marseille, 2 Place Le Verrier, F-13248 Marseille Cedex 4, France

Extract

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Several authors have explored the field of gas dynamics in barred systems. One of the aims of these investigations was to compare the model gaseous response, due to some assumed underlying stellar gravitational field, with observed gas density distribution and kinematics of barred galaxies. The gas is known to respond in a highly non-linear way, and therefore should give clues to dynamical parameters like the mass distribution, positions and existence of principal resonances and thereby the pattern speed.

High resolution HI data now exist for NGC 1365 (Jörsäter & van Moorsel 1995), and the kinematical HI data have been combined with optical long slit measurements to obtain the velocity field (Lindblad et al. 1995) used for extracting the rotation curve, representing the axisymmetric forces in NGC 1365, and for comparisons with models. A mosaic image of NGC 1365 in the J-band was used to compute the perturbing potential used in the models.

Type
Part VII. Theory and Observation
Information
International Astronomical Union Colloquium , Volume 157: Barred Galaxies , 1996 , pp. 413 - 415
Copyright
Copyright © Astronomical Society of the Pacific 1996

References

Athanassoula, E. 1992, MNRAS, 259, 328and 345Google Scholar
Jörsäter, S. & van Moorsel, G. 1995, AJ, 110, 2037 Google Scholar
Lindblad, P.A.B., Lindblad, P.O., & Athanassoula, E. 1995, A&A, submittedGoogle Scholar
Lindblad, P.O. & Lindblad, P.A.B. 1994, in The Gaseous and Stellar Disks of the Galaxy, King, I.R., San Francisco: AIP, 29 Google Scholar
Lindblad, P.O., Hjelm, M., Högbom, J., Jörsäter, S., Lindblad, P.A.B., & Santos-Lieo, M. 1995, in preparationGoogle Scholar
Wada, K. 1994, PASJ, 46, 165 Google Scholar