ON THE DETERMINATION OF GALAXY STRUCTURE ELLIPTICITY

Автор(и)

  • M. Biernacka Institute of Physics, Pedagogical University, ul.Swietokrzyska 15, 25-406 Kielce, Poland, Польща
  • P. Flin Institute of Physics, Pedagogical University, ul.Swietokrzyska 15, 25-406 Kielce, Poland,
  • T. Juszczyk Bednarski High School, ul. Czackiego 11, 30-501 Krakow, Poland,
  • E. Panko Kalinenkov Astronomical Observatory of the Nikolaev State University, Nikolskaya 24, Nikolaev 50030, Ukraine, Україна

DOI:

https://doi.org/10.18524/1810-4215.2007.20.87023

Ключові слова:

galaxy clusters, properties,

Анотація

We discuss factors influencing the determination of the observed shape of galaxy clusters when the covariance ellipse method is involved. The analysis of 377 Abell clusters show that at greater distances from the cluster center the ellipticity is rather smooth. There were no statistical differences among ellipticities when the cluster center was located at the brightest cluster member, the third brightest galaxy, the mean as well as the median values of galaxy coordinates. Moreover, we show that for rich galaxy clusters the distribution of ellipticities is the same for two totally different cluster samples.

Посилання

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Опубліковано

2007-12-22

Номер

Том 20 № 1 (2007)

Розділ

Статті

Ліцензія

Авторське право (c) 2016 Odessa Astronomical Publications

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Ця робота ліцензується відповідно до Creative Commons Attribution-NonCommercial 4.0 International License.

Відповідно Закону України про авторське право і суміжні права N 3792-XII від 23 грудня 1993 року