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An Hst Survey of Cores of Early-Type Galaxies

  • John Kormendy
  • Yong-Ik Byun
  • E. A. Ajhar
  • Tod R. Lauer
  • Alan Dressler
  • S. M. Faber
  • Carl Grillmair
  • Karl Gebhardt
  • Douglas Richstone
  • Scott Tremaine
Conference paper
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume 171)

Abstract

Photometry of the central parts of bulges and elliptical galaxies with the Hubble Space Telescope (HST) confirms and extends ground-based results. Most giant ellipticals have cuspy cores: at the “break radius”r b (formerly the core radius r c), the steep outer surface brightness profile turns down to a shallow inner power law \(I(r)\propto r^{-\gamma}\), \(0\leq \gamma \lesssim 0.25\). The corresponding slope of the deprojected profile is derived; the flattest cores allow box orbits to survive. Cores continue to satisfy fundamental plane parameter correlations like those found from the ground. In particular, HST confirms that the luminosity sequence of elliptical galaxies (from cDs to M 32) is physically unrelated to spheroidal galaxies like Fornax. The latter are closely related to late-type dwarfs. Low-luminosity ellipticals do not show cores: \(0.5 \lesssim \gamma \lesssim 1.3\). The most important new result is that global and core properties both show signs of a dichotomy between (i) low-luminosity ellipticals that rotate rapidly, that are nearly isotropic and oblate-spheroidal, that have disky-distorted isophotes, and that are coreless and (ii) giant ellipticals that are essentially nonrotating, anisotropic, and moderately triaxial, that are boxy-distorted, and that have cuspy cores.

Keywords

Galaxies Nuclei — Galaxies Photometry — Galaxies Structure 

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References

  1. Bender, R.: 1987, Mitt. Astr. Gesellschaft, No. 70, 226Google Scholar
  2. Bender, R.: 1988, Astr. Ap. 193, L7ADSGoogle Scholar
  3. Bender, R., Burstein, D., & Faber, S. M.: 1993, Ap. J. 411, 153ADSCrossRefGoogle Scholar
  4. Bender, R., Burstein, D., Faber, S. M.: 1994, in Panchromatic View of Galaxies — Their Evolutionary Puzzle, ed. G. Hensler et al., Edit. Frontières: Gif-sur-Yvette, 99Google Scholar
  5. Bender, R., et al.: 1989, Astr. Ap. 217, 35ADSGoogle Scholar
  6. Binggeli, B.: 1987, in Nearly Normal Galaxies: From the Planck Time to the Present, ed. S. M. Faber, Springer-Verlag: New York, 195CrossRefGoogle Scholar
  7. Binggeli, B.: 1994a, in ESO/OHP Workshop on Dwarf Galaxies, ed. G. Meylan & P. Prugniel, ESO: Garching, 13Google Scholar
  8. Binggeli, B.: 1994b, in Panchromatic View of Galaxies — Their Evolutionary Puzzle, ed. G. Hensler et al., Editions Frontières: Gif-sur-Yvette, 173Google Scholar
  9. Binggeli, B., & Cameron, L. M.: 1991, Astr. Ap. 252, 27ADSGoogle Scholar
  10. Binggeli, B., Sandage, A., & Tammann, G. A.: 1988, Ann. Rev. Astr. Ap. 26, 509ADSCrossRefGoogle Scholar
  11. Binney, J.: 1976, M. N. R. A. S. 177, 19ADSGoogle Scholar
  12. Binney, J.: 1978a, M. N. R. A. S. 183, 501ADSGoogle Scholar
  13. Binney, J.: 1978b, Comments Ap. 8, 27ADSGoogle Scholar
  14. Binney, J., & de Vaucouleurs, G.: 1981, M. N. R. A. S. 194, 679ADSGoogle Scholar
  15. Byun, Y.-I., et al.: 1995, A. J., in preparationGoogle Scholar
  16. Crane, P., et al.: 1993, A. J. 106, 1371ADSCrossRefGoogle Scholar
  17. Da Costa, G. S.: 1992, in IAU Symposium 149, The Stellar Populations of Galaxies, ed. B. Barbuy & A. Renzini, Kluwer: Dordrecht, 191CrossRefGoogle Scholar
  18. Davies, R. L., et al.: 1983, Ap. J. 266, 41ADSCrossRefGoogle Scholar
  19. de Zeeuw, T.: 1995, in IAU Symposium 171, New Light on Galaxy Evolution, ed. R. L. Davies & R. Bender, Kluwer: Dordrecht, in pressGoogle Scholar
  20. Djorgovski, S., de Carvalho, R., & Han, M.-S. 1988: in The Extragalactic Distance Scale, ed. S. van den Bergh & C. J. Pritchet, ASP: San Francisco, 329Google Scholar
  21. Djorgovski, S. G., Pahre, M. A., & de Carvalho, R. R.: 1995, in Fresh Views of Elliptical Galaxies, ed. A. Buzzoni et al., ASP: San Francisco, in pressGoogle Scholar
  22. Djorgovski, S., & Santiago, B.X.: 1993, ESO/EIPC Workshop: Structure, Dynamics, and Chemical Evolution of Early-Type Galaxies, ed. J. Danziger et al., ESO: Garching, 59Google Scholar
  23. Faber, S. M., et al.: 1987, in Nearly Normal Galaxies: From the Planck Time to the Present, ed. S. M. Faber, Springer-Verlag: New York, 175CrossRefGoogle Scholar
  24. Faber, S. M., et al.: 1995, A. J., in preparationGoogle Scholar
  25. Ferguson, H. C., & Binggeli, B.: 1994, Astr. Ap. Rev. 6, 67ADSGoogle Scholar
  26. Ferguson, H. C., & Sandage, A.: 1991, A. J. 101, 765ADSCrossRefGoogle Scholar
  27. Ferrarese, L., et al.: 1994, A. J. 108, 1598ADSCrossRefGoogle Scholar
  28. Forbes, D. A.: 1994, A. J. 107, 2017ADSCrossRefGoogle Scholar
  29. Forbes, D. A., Franx, M., & Illingworth, G. D.: 1994, Ap. J. 428, L49ADSCrossRefGoogle Scholar
  30. Forbes, D. A., Franx, M., & Illingworth, G. D.: 1995, A. J. 109, 1988ADSCrossRefGoogle Scholar
  31. Gebhardt, K., et al.: 1995, A. J., in preparationGoogle Scholar
  32. Grillmair, C. J., et al.: 1994, A. J. 108, 102ADSCrossRefGoogle Scholar
  33. Ichikawa, S.-I., et al.: 1988, A. J. 96, 62ADSCrossRefGoogle Scholar
  34. Ichikawa, S.-I., Wakamatsu, K.-I., & Okamura, S.: 1986, Ap. J. Suppl. 60, 475ADSCrossRefGoogle Scholar
  35. Illingworth, G.: 1977, Ap. J. 218, L43ADSCrossRefGoogle Scholar
  36. Jaffe, W., et al.: 1994, A. J. 108, 1567ADSCrossRefGoogle Scholar
  37. Kormendy, J.: 1982, in Morphology and Dynamics of Galaxies, Twelfth Saas-Fee Course, eds. L. Martinet & M. Mayor, Geneva Observatory: Sauverny, 113Google Scholar
  38. Kormendy, J.: 1984, Ap. J. 287, 577ADSCrossRefGoogle Scholar
  39. Kormendy, J.: 1985a, Ap. J. 292, L9ADSCrossRefGoogle Scholar
  40. Kormendy, J.: 1985b, Ap. J. 295, 73ADSCrossRefGoogle Scholar
  41. Kormendy, J.: 1987a, in IAU Symposium 127, Structure and Dynamics of Elliptical Galaxies, ed. T. de Zeeuw, Reidel: Dordrecht, 17CrossRefGoogle Scholar
  42. Kormendy, J.: 1987b, in Nearly Normal Galaxies: From the Planck Time to the Present, ed. S. M. Faber, Springer-Verlag: New York, 163CrossRefGoogle Scholar
  43. Kormendy, J., & Bender, R.: 1994, in ESO/OHP Workshop on Dwarf Galaxies, ed. G. Meylan & P. Prugniel, ESO: Garching, 161Google Scholar
  44. Kormendy, J., & Bender, R.: 1995. A. J., submittedGoogle Scholar
  45. Kormendy, J., & Djorgovski, S.: 1989, Ann. Rev. Astr. Ap. 27, 235ADSCrossRefGoogle Scholar
  46. Kormendy, J., et al: 1994, in ESO/OHP Workshop on Dwarf Galaxies, ed. G. Meylan & P. Prugniel, ESO: Garching, 147Google Scholar
  47. Kormendy, J., & McClure, R. D.: 1993, A. J. 105, 1793ADSCrossRefGoogle Scholar
  48. Lauer, T. R.: 1985a, Ap. J. Suppl. 57, 473ADSCrossRefGoogle Scholar
  49. Lauer, T. R.: 1985b, Ap. J. 292, 104ADSCrossRefGoogle Scholar
  50. Lauer, T. R., et al.: 1991, Ap. J. 369, L41ADSCrossRefGoogle Scholar
  51. Lauer, T. R., et al.: 1992a, A. J. 103, 703ADSCrossRefGoogle Scholar
  52. Lauer, T. R., et al.: 1992b, A. J. 104, 552ADSCrossRefGoogle Scholar
  53. Lauer, T. R., et al.: 1993, A. J. 106, 1436ADSCrossRefGoogle Scholar
  54. Lauer, T. R., et al.: 1995, A. J. in pressGoogle Scholar
  55. Merritt, D., & Fridman, T.: 1995a, in Fresh Views of Elliptical Galaxies, ed. A. Buzzoni et al., ASP: San Francisco, in pressGoogle Scholar
  56. Merritt, D., & Fridman, T.: 1995b, Ap. J., submittedGoogle Scholar
  57. Mihos, J. C., & Hernquist, L.: 1994, Ap. J. 437, L47ADSCrossRefGoogle Scholar
  58. Møller, P., Stiavelli, M., & Zeilinger, W. W.: 1995, M. N. R. A. S., in pressGoogle Scholar
  59. Nieto, J.-L., Bender, R., & Surma, P.: 1991, Astr. Ap. 244, L37ADSGoogle Scholar
  60. Saglia, R. P., Bender, R., & Dressler, A.: 1993, Astr. Ap. 279, 75ADSGoogle Scholar
  61. Sandage, A., Binggeli, B., & Tammann, G. A.: 1985, A. J. 90, 1759ADSCrossRefGoogle Scholar
  62. Sandage, A., Freeman, K. C., & Stokes, N. R.: 1970, Ap. J. 160, 831ADSCrossRefGoogle Scholar
  63. Schweizer, F.: 1980, Ap. J. 237, 303ADSCrossRefGoogle Scholar
  64. Schweizer, F.: 1981, Ap. J. 246, 722ADSCrossRefGoogle Scholar
  65. Stiavelli, M., Møller, P., & Zeilinger, W. W.: 1993, Astr. Ap. 277, 421ADSGoogle Scholar
  66. Tremaine, S.: 1995, in Some Unsolved Problems in Astrophysics, in pressGoogle Scholar
  67. van den Bosch, F. C., et al.: 1994, A. J. 108, 1579ADSCrossRefGoogle Scholar
  68. Young, P. J., et al.: 1978, Ap. J. 221, 721ADSCrossRefGoogle Scholar
  69. Wirth, A., & Gallagher, J. S.: 1984, Ap. J. 282, 85ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1996

Authors and Affiliations

  • John Kormendy
    • 1
  • Yong-Ik Byun
    • 1
  • E. A. Ajhar
    • 2
  • Tod R. Lauer
    • 2
  • Alan Dressler
    • 3
  • S. M. Faber
    • 4
  • Carl Grillmair
    • 4
  • Karl Gebhardt
    • 5
  • Douglas Richstone
    • 5
  • Scott Tremaine
    • 6
  1. 1.Institute for AstronomyUniversity of HawaiiHonoluluUSA
  2. 2.Kitt Peak National ObservatoryNational Optical Astronomy ObservatoriesTucsonUSA
  3. 3.Carnegie ObservatoriesPasadenaUSA
  4. 4.UCO/Lick ObservatoryUniversity of CaliforniaSanta CruzUSA
  5. 5.Dept. of AstronomyUniv. of MichiganAnn ArborUSA
  6. 6.Canadian Institute for Theoretical AstrophysicsUniversity of TorontoTorontoCanada

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