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The evolution of bulges of galaxies in minor fly-by interactions

Published online by Cambridge University Press:  14 May 2020

Ankit Kumar
Affiliation:
Indian Institute of Astrophysics, Bengaluru, 560034, India email: ankit4physics@gmail.com Department of physics, Indian Institute of Science, Bengaluru, 560012, India
Mousumi Das
Affiliation:
Indian Institute of Astrophysics, Bengaluru, 560034, India email: ankit4physics@gmail.com
Sandeep Kumar Kataria
Affiliation:
Indian Institute of Astrophysics, Bengaluru, 560034, India email: ankit4physics@gmail.com Department of physics, Indian Institute of Science, Bengaluru, 560012, India
Corresponding
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Abstract

We investigate the minor interactions of two disk galaxies with mass ratio of 10:1 in fly-by encounters that do not lead to the merging of the galaxies. In our N-body simulations, we vary only the pericenter distances to see the effect of the fly-by on the bulge of the major galaxy over the course of the trajectory. At different time steps of the evolution, we did two-dimensional fittings of disk, bulge and bar to trace the variation in the sersic index of the bulge. Our results suggest that galaxy bulges can become boxy/disky through flyby interactions of galaxies.

Type
Contributed Papers
Copyright
© International Astronomical Union 2020

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References

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