Merger driven explosive evolution of distant galaxies (minor mergers)

被引：3
|
作者：
Kats, A. V. [1 ]
Kontorovich, V. M. [2 ,3 ]
机构：
[1] Natl Acad Sci Ukraine, Inst Radio Phys & Elect, UA-61085 Kharkov, Ukraine
[2] Natl Acad Sci Ukraine, Inst Radio Astron, UA-61002 Kharkov, Ukraine
[3] Kharkov Natl Univ, UA-61022 Kharkov, Ukraine
来源：
ASTROPHYSICAL BULLETIN | 2013年 / 68卷 / 03期
关键词：
galaxies: interactions; galaxies: mass function; galaxies: evolution; LUMINOSITY FUNCTIONS; CLUSTERS;
D O I：
10.1134/S1990341313030048
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We derived solutions for the Smoluchowski kinetic equation for the mass function of galaxies, which describes mergers in differential approximation, where mergers with low-mass galaxies are the dominant factor. The evolution of the initial distribution is analyzed as well as the influence of the source represented by galaxies (halos) that disengage fromthe global cosmological expansion. It is shown that the evolution of the slope of the power-law portion of the luminosity function at a constant mass-to-luminosity ratio observed in the Ultradeep Hubble Field can be described as a result of explosive evolution driven by galaxy mergers. In this case the exponent depends exclusively on the uniformity degree of merger probability as a function of mass.
引用
收藏
页码：273 / 284
页数：12
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