Abstract
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.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A. A. Vikhlinin, A. V. Kravtsov, M. L. Markevich, et al., Uspekhi Fiz. Nauk 184, 349 (2014).
M. Girardi, G. Giuricin, F. Mardirossian, et al., Astrophys. J. 505, 74 (1998).
M. Ramella, W. Boschin, M. Geller, et al., Astron. J. 128, 2022 (2004).
A. Muzzin, H. K. C. Yee, P. B. Hall, and H. Lin, Astrophys. J. 663, 150 (2007).
A. J. R. Sanderson, T. J. Ponman, A. Finoguenov, et al., Monthly Notices Royal Astron. Soc. 340, 989 (2003).
A. Vikhlinin, A. Kravtsov, W. Forman, et al., Astrophys. J. 640, 691 (2006).
Y. Chen, T. H. Reiprich, H. Bohringer, et al., Astron. and Astrophys. 466, 805 (2007).
N. Okabe, M. Takada, K. Umetsu, et al., Publ. Astron. Soc. Japan 62, 811 (2010).
A. Diaferio and M. J. Geller, Astrophys. J. 481, 633 (1997).
I. D. Karachentsev and O. G. Nasonova, Monthly Notices Royal Astron. Soc. 405, 1075 (2010).
P. Nurmi, P. Heinamaki, T. Sepp, et al., Monthly Notices Royal Astron. Soc. 436, 380 (2013).
K. N. Abazajian, J. K. Adelman-McCarthy, M. A. Aqueros, et al., Astrophys. J. Suppl. 182, 543 (2009).
R. G. Carlberg, H. K. C. Yee, E. Ellingson, et al., Astrophys. J. 485, L13 (1997).
K. Rines and A. Diaferio, Astron. J. 132, 1275 (2006).
G. A. Mamon, A. Biviano, and G. Murante, Astron. and Astrophys. 520, A30 (2010).
A. Biviano, G. Murante, S. Borgani, et al., Astron. and Astrophys. 456, 23 (2006).
T. H. Reiprich and H. Bohringer, Astrophys. J. 567, 716 (2002).
H. J. Eckmiller, D. S. Hudson, and T. H. Reiprich, Astron. and Astrophys. 535, A105 (2011).
M. Sun, G. M. Voit, M. Donahue, et al., Astrophys. J. 693, 1142 (2009).
A. Finoguenov, T. H. Reiprich, and H. Bohringer, Astron. and Astrophys. 368, 749 (2001).
R. Piffaretti, Ph. Jetzer, J. S. Kaastra, and T. Tamura, Astron. and Astrophys. 433, 101 (2005).
F. Gastaldello, D. A. Buote, P. J. Humphrey, et al., Astrophys. J. 669, 158 (2007).
E. Pointecouteau, M. Arnaud, and G. M. Pratt, Astron. and Astrophys. 435, 1 (2005).
A. I. Kopylov and F. G. Kopylova, Astrophysical Bulletin 62, 311 (2007).
A. I. Kopylov and F. G. Kopylova, Astrophysical Bulletin 64, 207 (2009).
A. I. Kopylov and F. G. Kopylova, Astrophysical Bulletin 65, 205 (2010).
A. I. Kopylov and F. G. Kopylova, Astrophysical Bulletin 67, 17 (2012).
F. G. Kopylova and A. I. Kopylov, Astrophysical Bulletin 64, 1 (2009).
F. G. Kopylova and A. I. Kopylov, Astronomy Letters 37, 219 (2011).
F. G. Kopylova and A. I. Kopylov, Astronomy Letters 39, 1 (2013).
E. J. Tollerud, J. S. Bullock, G. J. Graves, and J. Wolf, Astrophys. J. 726, 108 (2011).
J. Wolf, G. D. Martinez, J. S. Bullock, et al., Monthly Notices Royal Astron. Soc. 406, 1220 (2010).
R. Schaffer, S. Maurogordato, A. Cappi, and F. Bernardeau, Monthly Notices Royal Astron. Soc. 263, L21 (1993).
N. Lyskova, Astronomische Nachrichten 334, 360 (2013).
N. Lyskova, E. Churazov, A. Moiseev, et al., Monthly Notices Royal Astron. Soc. 441, 2013 (2014).
T. H. Jarrett, T. Chester, R. Cutri, et al., Astrophys. J. 119, 2498 (2000).
K. Rines, M. J. Geller, A. Diaferio, et al., Astron. J. 128, 1078 (2004).
Y.-T. Lin, J. J. Mohr, and S. A. Stanford, Astrophys. J. 610, 745 (2004).
A. Kravtsov, A. Vikhlinin, and A. Meshscheryakov, submitted to Astrophys. J.; arXiv:1401.7329.
S. Andreon, Astron. and Astrophys. 548, A83 (2012).
M. Einasto, E. Saar, V. J. Maartinez, et al., Astrophys. J. 685, 83 (2008).
M. Einasto, L. J. Liivamagi, E. Tempel, et al., Astron. and Astrophys. 542, A36 (2012).
H. Bohringer, U. G. Briel, R. A. Schwartz, et al., Nature 368, 828 (1994).
A. Mahdavi, A. Finoguenov, H. Bohringer, et al., Astrophys. J. 622, 187 (2005).
Z. Huang and G. L. Sarazin, Astron. and Astrophys. 461, 622 (1996).
W. Forman, Chandra proposal ID #03800400 (2001).
K. Nelson, D. H. Rudd, L. Shaw, and D. Nagai, Astrophys. J. 751, 121 (2012).
Author information
Authors and Affiliations
Corresponding authors
Additional information
Original Russian Text © A.I. Kopylov, F.G. Kopylova, 2015, published in Astrofizicheskii Byulleten, 2015, Vol. 70, No. 3, pp. 257–270.
Rights and permissions
About this article
Cite this article
Kopylov, A.I., Kopylova, F.G. Structure of galaxy groups and clusters and measurement of their masses. Astrophys. Bull. 70, 243–256 (2015). https://doi.org/10.1134/S1990341315030013
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1990341315030013