Advertisement

TWO DIMENSIONAL VELOCITY FIELDS OF LOW SURFACE BRIGHTNESS GALAXIES

  • Rachel Kuzio de Naray
  • Stacy S. McGaugh
  • W.J.G. de Blok
  • Albert Bosma
Part of the Astrophysics and Space Science Proceedings book series (ASSSP)

Abstract

We have obtained high resolution two-dimensional velocity fields from integral field spectroscopy along with derived rotation curves for nine low surface brightness galaxies. This is a positive step forward in terms of both data quality and number of objects studied. We fit NFW and pseudo-isothermal halo models to the observations. We find that the pseudo-isothermal halo better represents the data in most cases than the NFW halo, as the resulting concentrations for the latter are lower than would be expected from CDM. Cusps can clearly be detected by this method when they are present and the data are of high quality. Yet only one of our six best cases is consistent with a cusp.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. de Blok, W.J.G., & Bosma, A. 2002, A.&A., 385, 816ADSGoogle Scholar
  2. de Blok, W.J.G., Bosma, A., & McGaugh, S.S. 2003, MNRAS, 340, 567CrossRefGoogle Scholar
  3. de Blok, W.J.G., McGaugh, S.S., & Rubin, V.C. 2001, AJ, 122, 2396CrossRefADSGoogle Scholar
  4. de Blok, W.J.G., McGaugh, S.S., Bosma, A., & Rubin, V.C. 2001, ApJ, 552, L23CrossRefADSGoogle Scholar
  5. de Blok, W.J.G., & McGaugh, S.S. 1997, MNRAS, 290, 533ADSGoogle Scholar
  6. Klypin, A.A., Kravtsov, A.V., Bullock, J.S., & Primack, J.R. 2001, ApJ, 554, 903CrossRefADSGoogle Scholar
  7. McGaugh, S.S., Barker, M.K. & de Blok, W.J.G. 2003, ApJ, 584, 566CrossRefADSGoogle Scholar
  8. McGaugh, S.S., Rubin, V.C., & de Blok, W.J.G. 2001, AJ, 122, 2381CrossRefADSGoogle Scholar
  9. Moore, B., Quinn, T., Governato, F., Stadel, J., & Lake, G. 1999, MNRAS, 310, 1147CrossRefADSGoogle Scholar
  10. Navarro, J.F., Frenk, C.S., & White, S.D.M. 1997, ApJ, 490, 493CrossRefADSGoogle Scholar
  11. Swaters, R.A., Madore, B.F., van den Bosch, F.C., & Balcells, M. 2003, ApJ, 583, 732CrossRefADSGoogle Scholar
  12. Swaters, R.A., Verheijen, M.A.W., Bershady, M.A., & Andersen, D.R. 2003, ApJ, 587, L13CrossRefADSGoogle Scholar

Copyright information

© Springer 2007

Authors and Affiliations

  • Rachel Kuzio de Naray
    • 1
  • Stacy S. McGaugh
    • 1
  • W.J.G. de Blok
    • 2
  • Albert Bosma
    • 3
  1. 1.Astronomy DepartmentUniversity of MarylandUSA
  2. 2.Research School of Astronomy and AstrophysicsAustralian National UniversityAustralia
  3. 3.Observatoire de MarseilleFrance

Personalised recommendations