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RESONANCES AND EXTENT OF SPIRAL ARMS IN DISK GALAXIES

  • Preben Grosbøl
  • Philippe Héraudeau
Part of the Astrophysics and Space Science Proceedings book series (ASSSP)

Abstract

The distribution of visual matter in 84 spiral galaxies was estimated from NIR Kband maps observed with SOFI/NTT, ESO. Decomposing the maps into standard axisymmetric components (e.g. disk and bulge) and using HI line width data with a maximum disk assumption for the halo, synthetic rotation curves were estimated for each galaxy. The extent of the main spiral pattern measured on the K maps of galaxies was compared with the distance between major resonances (i.e. ILR, 4:1, CR and OLR) as obtained from the synthetic rotation curves assuming that the start of the spiral corresponded to either ILR or CR.

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References

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Copyright information

© Springer 2007

Authors and Affiliations

  • Preben Grosbøl
    • 1
  • Philippe Héraudeau
    • 2
  1. 1.European Southern ObservatoryGermany
  2. 2.Kapteyn Astronomical InstituteGroningenThe Netherlands

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