Stellar Disk Truncations: Where Do We Stand?

  • M. Pohlen
  • J. E. Beckman
  • S. Hüttemeister
  • J. H. Knapen
  • P. Erwin
  • R.-J. Dettmar
Part of the Astrophysics and Space Science Library book series (ASSL, volume 319)

Abstract

In the light of several recent developments we revisit the phenomenon of galactic stellar disk truncations. Even 25 years since the first paper on outer breaks in the radial light profiles of spiral galaxies, their origin is still unclear. The two most promising explanations are that these ‘outer edges’ either trace the maximum angular momentum during the galaxy formation epoch, or are associated with global star formation thresholds. Depending on their true physical nature, these outer edges may represent an improved size characteristic (e.g., as compared to D 25) and might contain fossil evidence imprinted by the galaxy formation and evolutionary history. We will address several observational aspects of disk truncations: their existence, not only in normal HSB galaxies, but also in LSB and even dwarf galaxies; their detailed shape, not sharp cut-offs as thought before, but in fact demarcating the start of a region with a steeper exponential distribution of starlight; their possible association with bars; as well as problems related to the line-of-sight integration for edge-on galaxies (the main targets for truncation searches so far). Taken together, these observations currently favour the star-formation threshold model, but more work is necessary to implement the truncations as adequate parameters characterising galactic disks.

Keywords

Dust Prep Erwin 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Barteldrees, A., & Dettmar, R.-J. 1994, AAS, 103, 475Google Scholar
  2. Barton, I. J., & Thompson, L. A. 1997, AJ, 114, 655ADSCrossRefGoogle Scholar
  3. Battaner, E., Florido, E., & Jiménez-Vicente, J. 2002, AA, 388, 213ADSGoogle Scholar
  4. Bell, E. F., & de Jong, R. S., 2000, MNRAS, 312, 497ADSCrossRefGoogle Scholar
  5. Courteau, S. 1996, ApJS, 103, 363ADSCrossRefGoogle Scholar
  6. Davidge, T. J., 2003, AJ, 125, 3046ADSCrossRefGoogle Scholar
  7. de Grijs, R. 1997, PhD Thesis, Rijksuniversiteit Groningen, Netherlands de Grijs, R., Kregel, M., & Wesson, K. H. 2001, MNRAS, 324, 1074Google Scholar
  8. de Jong, R. S. 1996, AA 313, 45ADSGoogle Scholar
  9. Erwin, P, Pohlen, M., & Beckman, J., 2004, in prep.Google Scholar
  10. Ferguson, A. M. N., Wyse, R. F. G., Gallagher, J. S., & Hunter, D. A. 1998, ApJ, 506, L19 Ferguson, A. M. N., & Clark, C. J. 2001, MNRAS, 325, 781Google Scholar
  11. Florido, E., Battaner, E., Guijarro, A., Garzón, F., & Jiménez-Vicente, J. 2001, AA, 378, 82 Freeman K C 1970, ApJ, 160, 811Google Scholar
  12. Hidalgo, S. L., Marín-Franch, A., & Aparicio, A. 2003, AJ, 125, 1247ADSCrossRefGoogle Scholar
  13. Hunter, D. A., 2002, in: Outer Edges of Dwarf Irr Galaxies, Lowell Workshop, Online-Proceedings Kennicutt, R. C., 1989, ApJ, 344, 685Google Scholar
  14. Kregel, M., van der Kruit, R C., & de Grijs, R. 2002, MNRAS, 334, 646 Kregel, M., 2003, PhD Thesis, Rijksuniversiteit Groningen, Netherlands Labbé, I., et al. 2003, ApJL, 591, L95CrossRefGoogle Scholar
  15. Larson, R.B. 1976, MNRAS, 176, 31ADSGoogle Scholar
  16. Martin, C. L., & Kennicutt, R. C., Jr. 2001, ApJ, 555, 301ADSCrossRefGoogle Scholar
  17. Narayan, C. A. & Jog, C. J. 2003, AA, 407, L59ADSGoogle Scholar
  18. Pohlen, M., Dettmar, R.-J., & Lütticke, R. 2000a, AA, 357, LlGoogle Scholar
  19. Pohlen, M., Dettmar, R.-J., Lütticke, R., & Schwarzkopf, U. 2000b, AAS, 144, 405 Pohlen, M., 2001, PhD Thesis, Ruhr-Universität Bochum, GermanyGoogle Scholar
  20. Pohlen, M., Dettmar, R.-J., Lütticke, R., & Aronica, G. 2002, AA, 392, 807 Pohlen, M., Balcells, Lütticke, R., & Dettmar, R.-J. 2004, AA, in press Quinn, R J., Hernquist, L., & Fullagar, D. P. 1993, ApJ, 403, 74Google Scholar
  21. Schaye, J. 2004, ApJ, in press, astro-ph/0205125Google Scholar
  22. Simon, J. D., Bolatto, A. D., Leroy, A., & Blitz, L. 2003, ApJ, 596, 957 Tamm, A. & Tenjes, P. 2003, AA, 403, 529Google Scholar
  23. Toomre, A. 1964, ApJ, 139, 1217ADSCrossRefGoogle Scholar
  24. van den Bosch, F. C. 2001, MNRAS, 327, 1334ADSCrossRefGoogle Scholar
  25. van der Kruit, P. C. 1979, AAS, 38, 15Google Scholar
  26. van der Kruit, E C. 1987, AA, 173, 59ADSGoogle Scholar
  27. van der Kruit, E C. 1988, AA, 192, 117ADSGoogle Scholar
  28. van der Kruit, P. C., Searle, L., 1981a, AA 95, 105ADSGoogle Scholar
  29. van der Kruit, P. C., Searle, L., 1981 b, AA 95, 116Google Scholar
  30. Weiner, B. J., Williams, T. B., van Gorkom, J. H., & Sellwood, J. A. 2001, 546, 916Google Scholar
  31. Zhang, B. & Wyse, R. F. G. 2000, MNRAS, 313, 310ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2004

Authors and Affiliations

  • M. Pohlen
    • 1
  • J. E. Beckman
    • 1
  • S. Hüttemeister
    • 2
  • J. H. Knapen
    • 3
  • P. Erwin
    • 1
  • R.-J. Dettmar
    • 2
  1. 1.Instituto de Astrofísica de CanariasSpain
  2. 2.Astronomisches InstitutRuhr-Universitat BochumGermany
  3. 3.Centre for Astrophysics ResearchUniversity of HertfordshireUK

Personalised recommendations