منابع مشابه
The Stellar Populations of dSph Galaxies in Nearby Groups
In this contribution initial results are presented from a program to study in detail the stellar populations of dwarf Spheriodal (dSph) galaxies in three nearby groups. The long-term aim of the program is to assess the influence of environment in governing the evolution of these low-luminosity systems. Specific results described here include the detection and measurement of intermediate-age upp...
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We have compared numerical simulations to observations for the nearby (< 40 Mpc) groups of galaxies (Huchra & Geller 1982 and Ramella et al. 2002). The group identification is carried out using a group-finding algorithm developed by Huchra & Geller (1982). Using cosmological N-body simulation code with the ΛCDM cosmology, we show that the dynamical properties of groups of galaxies identified fr...
متن کاملMorphology and luminosity segregation of galaxies in nearby loose groups
We study morphology and luminosity segregation of galaxies in loose groups. We analyze the two catalogs of groups which have been identified in the Nearby Optical Galaxy (NOG) sample, by means of hierarchical and percolation “friends-offriends” methods (HG and PG catalogs, respectively). In the first part of our analysis we consider 387 and 436 groups of HG and PG, respectively, and compare mor...
متن کاملStellar Populations in the Central Galaxies of Fossil Groups
It is inferred from the symmetrical and luminous X-ray emission of fossil groups that they are mature, relaxed galaxy systems. Cosmological simulations and observations focusing on their dark halo and inter-galactic medium properties confirm their early formation. Recent photometric observations suggest that, unlike the majority of non-fossil brightest group galaxies (BGGs), the central early-t...
متن کاملStructure and Evolution of Nearby UV - bright Starburst Galaxies
Nearby (D≤ 100 Mpc) luminous blue starburst galaxies frequently show morphological evidence for recent involvement in mild collisions , or minor mergers where the disk survives. As a consequence UV-bright starbursts are preferentially seen in near face-on galaxies, and the postburst systems may become star-forming late-type galaxies. If this starburst evolutionary channel is important at modera...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2014
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921316009868