Astrophysical Bulletin

, Volume 70, Issue 3, pp 243–256 | Cite as

Structure of galaxy groups and clusters and measurement of their masses

  • A. I. Kopylov
  • F. G. Kopylova


We report the results of measurement and comparison of masses for a sample of 29 groups and clusters of galaxies (z < 0.1). We use the SDSSDR7 archive data to determine dynamical masses from the one-dimensional dispersion of line-of-sight velocities for virialized regions of radii R 200 and R e. Our method for determination of effective radii of galaxy systems fromthe cumulative distribution of the number of galaxies depending on squared clustercentric distance allowed us to estimate masses M 1/2 (within R e), which are related to the masses contained inside R 200: M 200 ~ 1.65M 1/2. A comparison of the inferred dynamic masses and the hydrostatic masses determined from the radiation of hot gas in galaxy groups and clusters (based on published data) led us to conclude that the inferred masses for the main sample of 21 groups and clusters agree to within 12%. These systems also obey the relation M X,200 ~ 1.65M 1/2. For the remaining eight systems, which are mostly located in the Hercules supercluster, the discrepancy between the hydrostatic and the dynamic masses amounts to 2σ. This discrepancy is most likely due to the incompleteness of the formation processes of these clusters via hierarchical merger in the region of the rich Hercules supercluster.


galaxies clusters general—galaxies groups general 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    A. A. Vikhlinin, A. V. Kravtsov, M. L. Markevich, et al., Uspekhi Fiz. Nauk 184, 349 (2014).CrossRefGoogle Scholar
  2. 2.
    M. Girardi, G. Giuricin, F. Mardirossian, et al., Astrophys. J. 505, 74 (1998).CrossRefADSGoogle Scholar
  3. 3.
    M. Ramella, W. Boschin, M. Geller, et al., Astron. J. 128, 2022 (2004).CrossRefADSGoogle Scholar
  4. 4.
    A. Muzzin, H. K. C. Yee, P. B. Hall, and H. Lin, Astrophys. J. 663, 150 (2007).CrossRefADSGoogle Scholar
  5. 5.
    A. J. R. Sanderson, T. J. Ponman, A. Finoguenov, et al., Monthly Notices Royal Astron. Soc. 340, 989 (2003).CrossRefADSGoogle Scholar
  6. 6.
    A. Vikhlinin, A. Kravtsov, W. Forman, et al., Astrophys. J. 640, 691 (2006).CrossRefADSGoogle Scholar
  7. 7.
    Y. Chen, T. H. Reiprich, H. Bohringer, et al., Astron. and Astrophys. 466, 805 (2007).CrossRefADSGoogle Scholar
  8. 8.
    N. Okabe, M. Takada, K. Umetsu, et al., Publ. Astron. Soc. Japan 62, 811 (2010).CrossRefADSGoogle Scholar
  9. 9.
    A. Diaferio and M. J. Geller, Astrophys. J. 481, 633 (1997).CrossRefADSGoogle Scholar
  10. 10.
    I. D. Karachentsev and O. G. Nasonova, Monthly Notices Royal Astron. Soc. 405, 1075 (2010).ADSGoogle Scholar
  11. 11.
    P. Nurmi, P. Heinamaki, T. Sepp, et al., Monthly Notices Royal Astron. Soc. 436, 380 (2013).CrossRefADSGoogle Scholar
  12. 12.
    K. N. Abazajian, J. K. Adelman-McCarthy, M. A. Aqueros, et al., Astrophys. J. Suppl. 182, 543 (2009).CrossRefADSGoogle Scholar
  13. 13.
    R. G. Carlberg, H. K. C. Yee, E. Ellingson, et al., Astrophys. J. 485, L13 (1997).CrossRefADSGoogle Scholar
  14. 14.
    K. Rines and A. Diaferio, Astron. J. 132, 1275 (2006).CrossRefADSGoogle Scholar
  15. 15.
    G. A. Mamon, A. Biviano, and G. Murante, Astron. and Astrophys. 520, A30 (2010).CrossRefADSGoogle Scholar
  16. 16.
    A. Biviano, G. Murante, S. Borgani, et al., Astron. and Astrophys. 456, 23 (2006).CrossRefADSGoogle Scholar
  17. 17.
    T. H. Reiprich and H. Bohringer, Astrophys. J. 567, 716 (2002).CrossRefADSGoogle Scholar
  18. 18.
    H. J. Eckmiller, D. S. Hudson, and T. H. Reiprich, Astron. and Astrophys. 535, A105 (2011).CrossRefADSGoogle Scholar
  19. 19.
    M. Sun, G. M. Voit, M. Donahue, et al., Astrophys. J. 693, 1142 (2009).CrossRefADSGoogle Scholar
  20. 20.
    A. Finoguenov, T. H. Reiprich, and H. Bohringer, Astron. and Astrophys. 368, 749 (2001).CrossRefADSGoogle Scholar
  21. 21.
    R. Piffaretti, Ph. Jetzer, J. S. Kaastra, and T. Tamura, Astron. and Astrophys. 433, 101 (2005).CrossRefADSGoogle Scholar
  22. 22.
    F. Gastaldello, D. A. Buote, P. J. Humphrey, et al., Astrophys. J. 669, 158 (2007).CrossRefADSGoogle Scholar
  23. 23.
    E. Pointecouteau, M. Arnaud, and G. M. Pratt, Astron. and Astrophys. 435, 1 (2005).CrossRefADSGoogle Scholar
  24. 24.
    A. I. Kopylov and F. G. Kopylova, Astrophysical Bulletin 62, 311 (2007).CrossRefADSGoogle Scholar
  25. 25.
    A. I. Kopylov and F. G. Kopylova, Astrophysical Bulletin 64, 207 (2009).CrossRefADSGoogle Scholar
  26. 26.
    A. I. Kopylov and F. G. Kopylova, Astrophysical Bulletin 65, 205 (2010).CrossRefADSGoogle Scholar
  27. 27.
    A. I. Kopylov and F. G. Kopylova, Astrophysical Bulletin 67, 17 (2012).CrossRefADSGoogle Scholar
  28. 28.
    F. G. Kopylova and A. I. Kopylov, Astrophysical Bulletin 64, 1 (2009).CrossRefADSGoogle Scholar
  29. 29.
    F. G. Kopylova and A. I. Kopylov, Astronomy Letters 37, 219 (2011).CrossRefADSGoogle Scholar
  30. 30.
    F. G. Kopylova and A. I. Kopylov, Astronomy Letters 39, 1 (2013).CrossRefADSGoogle Scholar
  31. 31.
    E. J. Tollerud, J. S. Bullock, G. J. Graves, and J. Wolf, Astrophys. J. 726, 108 (2011).CrossRefADSGoogle Scholar
  32. 32.
    J. Wolf, G. D. Martinez, J. S. Bullock, et al., Monthly Notices Royal Astron. Soc. 406, 1220 (2010).ADSGoogle Scholar
  33. 33.
    R. Schaffer, S. Maurogordato, A. Cappi, and F. Bernardeau, Monthly Notices Royal Astron. Soc. 263, L21 (1993).CrossRefADSGoogle Scholar
  34. 34.
    N. Lyskova, Astronomische Nachrichten 334, 360 (2013).CrossRefADSGoogle Scholar
  35. 35.
    N. Lyskova, E. Churazov, A. Moiseev, et al., Monthly Notices Royal Astron. Soc. 441, 2013 (2014).CrossRefADSGoogle Scholar
  36. 36.
    T. H. Jarrett, T. Chester, R. Cutri, et al., Astrophys. J. 119, 2498 (2000).Google Scholar
  37. 37.
    K. Rines, M. J. Geller, A. Diaferio, et al., Astron. J. 128, 1078 (2004).CrossRefADSGoogle Scholar
  38. 38.
    Y.-T. Lin, J. J. Mohr, and S. A. Stanford, Astrophys. J. 610, 745 (2004).CrossRefADSGoogle Scholar
  39. 39.
    A. Kravtsov, A. Vikhlinin, and A. Meshscheryakov, submitted to Astrophys. J.; arXiv:1401.7329.Google Scholar
  40. 40.
    S. Andreon, Astron. and Astrophys. 548, A83 (2012).CrossRefADSGoogle Scholar
  41. 41.
    M. Einasto, E. Saar, V. J. Maartinez, et al., Astrophys. J. 685, 83 (2008).CrossRefADSGoogle Scholar
  42. 42.
    M. Einasto, L. J. Liivamagi, E. Tempel, et al., Astron. and Astrophys. 542, A36 (2012).CrossRefADSGoogle Scholar
  43. 43.
    H. Bohringer, U. G. Briel, R. A. Schwartz, et al., Nature 368, 828 (1994).CrossRefADSGoogle Scholar
  44. 44.
    A. Mahdavi, A. Finoguenov, H. Bohringer, et al., Astrophys. J. 622, 187 (2005).CrossRefADSGoogle Scholar
  45. 45.
    Z. Huang and G. L. Sarazin, Astron. and Astrophys. 461, 622 (1996).ADSGoogle Scholar
  46. 46.
    W. Forman, Chandra proposal ID #03800400 (2001).Google Scholar
  47. 47.
    K. Nelson, D. H. Rudd, L. Shaw, and D. Nagai, Astrophys. J. 751, 121 (2012).CrossRefADSGoogle Scholar

Copyright information

© Pleiades Publishing, Ltd. 2015

Authors and Affiliations

  1. 1.Special Astrophysical ObservatoryRussian Academy of SciencesNizhnii ArkhyzRussia

Personalised recommendations