CO-Line Rotation Curves, Deep Potential of Massive Cores, and High-density Molecular Nuclei

  • Yoshiaki Sofue
Conference paper
Part of the Astrophysics and Space Science Proceedings book series (ASSSP)

We review observational studies of central rotation curves of spiral galaxies using the Nobeyama mm-wave interferometer in the CO 2.6-mm line emission. The observed high-accuracy rotation curves show universal characteristics: RCs rise steeply in the nuclei, or they start at finite speed, and are flat toward the galaxy edges. Calculated mass distributions are similar to each other: spiral galaxies generally have a massive core of ~109M in the central 100 pc, bulge, disk and a dark halo. We found extremely high-density, single-peaked molecular gas nuclei in many galaxies, which are embedded in deep gravitational potential of the massive core. Although the molecular nuclei is as dense as that of a giant molecular cloud, the gas is kept gravitationally stable because of the high-velocity rotation.


Rotation Curve Spiral Galaxy Massive Core Central Black Hole Dark Halo 
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  1. 1.
    Sofue, Y. and Rubin, V.: ARAA 39, 137 (2001)CrossRefADSGoogle Scholar
  2. 2.
    Schinnerer, E., Maciejewski, W., Scoville, N.Z., Moustakas, L.A.: ApJ, 575, 826 (2002)CrossRefADSGoogle Scholar
  3. 3.
    Regan, M W., Thornley, M D., Helfer, T T., et al.: ApJ 561, 218 (2001)CrossRefADSGoogle Scholar
  4. 4.
    Schinnerer, E., Eckart, A., & Tacconi, L. J.: ApJ 524, L5 (1999)CrossRefADSGoogle Scholar
  5. 5.
    Sakamoto, K., Okumura, S. K., Ishizuki, S., and Scoville, N. Z.: ApJS 124, 403 (1999)CrossRefADSGoogle Scholar
  6. 6.
    Sofue, Y., Koda, J., Nakanishi, H., et al.: PASJ 55,17 (2003)ADSGoogle Scholar
  7. 7.
    Sofue, Y., Koda, J., Nakanishi, H., Onodera, S.: PASJ 55, 59 (2003)ADSGoogle Scholar
  8. 8.
    Nakanishi, H., et al.: PASJ 57, 965 (2006)Google Scholar
  9. 9.
    Onodera, S. et al.: PASJ 56, 439 (2004)ADSGoogle Scholar
  10. 10.
    Koda, J. and Sofue, Y.: PASJ 58, 299 (2006)ADSGoogle Scholar
  11. 11.
    Ferrarese, L., Freedman, W. L., Hill, R. J., et al.: ApJ. 464, 568 (1996)CrossRefADSGoogle Scholar
  12. 12.
    Takamiya, T, and Sofue, Y.: ApJL 576, L15 (2002)CrossRefADSGoogle Scholar
  13. 13.
    Takamiya, T, and Sofue, Y.: ApJ 534, 670 (2000)CrossRefADSGoogle Scholar
  14. 14.
    Sofue, Y.: PASJ 51, 445 (1999)ADSGoogle Scholar
  15. 15.
    Sofue, Y., Koda, J., Kohno, K., et al.: ApJL 547, L115 (2001)CrossRefADSGoogle Scholar
  16. 16.
    Koda, K., Sofue, Y., Kohno, K., et al.: ApJ 573, 105 (2002)CrossRefADSGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Yoshiaki Sofue
    • 1
  1. 1.Institute of AstronomyUniversity of TokyoMitakaJapan

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