THE DISTRIBUTION OF BARYON MATTER IN THE NEARBY X-RAY GALAXY CLUSTERS

Iu. V. Babyk, I. B. Vavilova

Анотація


We present the results on the distribution of baryon matter in the galaxy clusters (z < 0.2), based on the Chandra X-ray Observatory data. The observed surface brightness profiles were approximated by β- model, which provides a good fit for all clusters. We found a correlation between cluster's radius R200 and temperature T , taking into account that their measurements are statistically independent because of the mass of gas is almost independent on cluster's temperature: R200 = 850 kpc x T 0.61±0.04 keV. We obtained an empirical relation for a total mass of baryon matter (intercluster medium and galaxies), and the upper limit (25-30%) on its changes in a total mass of nearby X-ray galaxy clusters.

Ключові слова


Galaxy clusters; X-ray galaxy clusters.

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Посилання


Babyk Iu.: 2012, Journ. Phys. Studies, 16, 7.

Babyk Iu.: 2012, Izv. CrAO, 108, 127.

Babyk Iu., Melnyk O., Elyiv A., Krivodubskij V.:

, Kinemat. Physics Celest. Bodies, 28, 69.

Babyk Iu., Vavilova I., Del Popolo A.: 2012, submitted

to MNRAS, arXiv:1208.2424.

Babyk Iu., Vavilova I.: 2012, Proc. Confer. Young

Scientists of CIS Countries, Armenia, 2011, 162. Bartelmann M., Steinmetz M.: 1996, MNRAS, 283, 431.

Cavaliere A., Fusco-Femiano R.: 1976, A&A, 49, 137.

Einasto J.: 2001, New Astronomy Reviews, 45, 355.

Jones C., Forman W.: 1999, ApJ, 511, 65.

Hoekstra H.: 2007, MNRAS, 379, 317.

Mohr J.J., Evrard A.E.: 1997, ApJ, 491, 38.

Navarro J.F., Frenk C.S. & White S.D.: 1998, MN RAS, 275, 720.

Peres C. et al.:1998, MNRAS, 298, 416.

Schmidt R.W., Allen S.W.: 2007, MNRAS, 379, 209.

Voevodkin A.A., Vikhlinin A.A., Pavlinskii M.N.: 2002, Letters in AJ, 28, 366

Voevodkin A.A., Vikhlinin A.A., Pavlinskii M.N.: 2002, Letters in AJ, 28, 793.

White D.A. & Fabian A.C.: 1995, MNRAS, 273, 72.




DOI: https://doi.org/10.18524/1810-4215.2012.25.83328

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