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Dynamical imprint of interstellar gas on persistence of spiral structure in galaxies

Published online by Cambridge University Press:  02 August 2018

Soumavo Ghosh Open the ORCID record for Soumavo Ghosh [Opens in a new window]  and
Chanda J. Jog
Soumavo Ghosh
Affiliation:
Department of Physics, Indian Institute of Science, Bangalore 560012, India email: soumavo@iisc.ac.in; cjjog@iisc.ac.in
Chanda J. Jog
Affiliation:
Department of Physics, Indian Institute of Science, Bangalore 560012, India email: soumavo@iisc.ac.in; cjjog@iisc.ac.in
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Abstract

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The persistence of the spiral structure in disk galaxies has long been debated. In this work, we investigate the dynamical influence of interstellar gas on the persistence of the spiral arms in disk galaxies. We show that the gas helps the spiral arms to survive for longer time-scale (~ a few Gyr). Also, we show that the addition of gas in calculation is necessary for getting a stable density wave corresponding to the observed pattern speed of the spiral arms.

Keywords

galaxies: spiralgalaxies: ISMgalaxies: kinematics and dynamics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S334: Rediscovering our Galaxy , July 2017 , pp. 296 - 297
Copyright
Copyright © International Astronomical Union 2018 

References

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