Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-28T14:02:07.699Z Has data issue: false hasContentIssue false
  • English
  • Français

Surfing on the bar: the formation of anti-truncated stellar disk profiles

Published online by Cambridge University Press:  21 March 2017

Jakob Herpich ,
Gregory S. Stinson ,
Aaron A. Dutton ,
Rix Hans-Walter  and
Marie Martig
Jakob Herpich
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany email: [email protected]
Gregory S. Stinson
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany email: [email protected]
Aaron A. Dutton
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany email: [email protected] New York University Abu Dhabi, PO Box 129188, Abu Dhabi, UAE
Rix Hans-Walter
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany email: [email protected]
Marie Martig
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The stellar radial profiles of disk galaxies are often observed to be truncated, or anti-truncated in the galaxies’ outskirts. As of now, the literature about galaxy formation lacks a model for the formation of observed anti-truncated stellar disks which is based on secular processes. We present an attempt to fill this gap. We were able to model anti-truncated disks in numerical SPH simulations of the formation of isolated galaxies. We will show that the stars in the outskirts of the simulated galactic disk are on very eccentric orbits but were formed on circular orbits at much smaller radii. We argue that a strong central bar is the main driver of the formation of such a disk configuration. The model predicts that such outer stellar disks should show very slow rotation, but high radial dispersion. If confirmed, their existence would constitute galaxy disks of qualitatively very new kinematic properties.

Keywords

galaxies: evolutiongalaxies: kinematics and dynamicsmethods: n-body simulations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S321: Formation and Evolution of Galaxy Outskirts , March 2016 , pp. 78 - 80
Copyright
Copyright © International Astronomical Union 2017 

References

Binney, J. & Tremaine, S. 2008, Galactic dynamics, 2nd ed., Princeton University Press, Princeton, NJ CrossRefGoogle Scholar
Borlaff, A., Eliche-Moral, M. C., Rodríguez-Pérez, C., Querejeta, M., Tapia, T., Pérez-González, P. G., Zamorano, J., Gallego, J., & Beckman, J. 2014, A&A, 570, A103 Google Scholar
de Vaucouleurs, G. 1957, AJ 62 96–82Google Scholar
de Vaucouleurs, G. 1958, ApJ, 128, 465 CrossRefGoogle Scholar
Dutton, A. A. 2009, MNRAS 396 121–140 Google Scholar
Erwin, P., Beckman, J. E., & Pohlen, M. 2005, ApJ (Letters), 626, L81–L84 Google Scholar
Freeman, K. C. 1970, ApJ, 160, 811 Google Scholar
Herpich, J., Stinson, G. S., Dutton, A. A., Rix, H.-W., Martig, M., Roškar, R., Macciò, A. V., Quinn, T. R., Wadsley, J. 2015, MNRAS 448 L99–L103 CrossRefGoogle Scholar
Kazantzidis, S., Zentner, A. R., Kravtsov, A. V., Bullock, J. S., & Debattista, V. P. 2009, ApJ 700 1869–1920 Google Scholar
Minchev, I., Famaey, B., Quillen, A. C., Di Matteo, P., Combes, F., Vlajić, M., Erwin, P., & Bland-Hawthorn, J. 2012, A&A, 548, A126 Google Scholar
Pohlen, M., Beckman, J. E., Hüttemeister, S., Knapen, J. H., Erwin, P., & Dettmar, R.-J. 2004, in: Block, D. L.; Puerari, I.; Freeman, K. C.; Groess, R. & Block, E. K. (eds.), Penetrating Bars Through Masks of Cosmic Dust, 319, 713 Google Scholar
Roediger, J. C., Courteau, S., Sánchez-Blázquez, P., & McDonald, M. 2012, ApJ, 758, 41 CrossRefGoogle Scholar
Roškar, R., Debattista, V. P., Stinson, G. S., Quinn, T. R., Kaufmann, T., & Wadsley, J. 2008, ApJ (Letters), 675, L65–L68 Google Scholar
van der Kruit, P. C. 1979, A&AS 38 15–38 Google Scholar
Younger, J. D., Cox, T. J., Seth, A. C., & Hernquist, L. 2007, ApJ 670 269–278 Google Scholar