FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3008680503> ?p ?o ?g. }

• W3008680503 abstract "Galaxy groups are believed to play a key role in the formation and evolution of structure in the universe as they are the most common environment where galaxies reside. Despite its abundance, these galaxy aggregations have, however, received little attention in contrast to the more conspicuous and richer clusters of galaxies. At group scales, most efforts have been focused so far in investigating the evolutionary effects of the global tidal field in a fully assembled group environment. The goal of this PhD thesis is to examine the role played by the frequent low-speed galaxy collisions that occur during the pre-collapse phase of these systems in shaping the properties of the group members and the intragroup medium. The first part of the work presents a fully functional numerical model of a pre-virialized galaxy group within the framework of the LambdaCDM concordance cosmology. This group model, which provides a realistic caricature of these systems in the early stages of their formation, is designed to extend the methodology of binary merger simulations to these scales. Both the group and its member galaxies are modeled as live multicomponent, collisionless, N-body systems, composed of dark matter and stars. The second part of the thesis presents a series of results inferred from six high-resolution 10^7-particle simulations of our pre-virialized groups. All groups are evolved for about 10 Gyr and cover a relatively broad parameter space of initial conditions. We apply several measurement techniques and use different astronomical tools to study both the production of intergalactic luminous material (IGLM) and the evolution of galaxy properties driven by the frequent encounters experienced by galaxies in the group environment. By following the evolution of isolated binary mergers, from the binding energy and local density of the particles, we find momentary but significant decrements in the number of bound particles due to punctual kinematic decouplings of the dense galactic cores and a staggered evolution of the unbound mass. The results of this sort of analysis further indicate that the binding energy of the stripped starlight is essentially uncorrelated with the local mass density. We also characterize the structure and kinematics of two representative major mergers finding indications that the full relaxation of the outer radial structure of the remnants requires a minimum of ~ 2 Gyr. This however does not preclude that the fraction of diffuse stellar material of the remnants does not change significantly with time after the coalescence of the cores of the progenitors. Furthermore, we find that all our simulations produce systematically a low (< 10%) IGLM fraction. In the absence of a larger statistics that increases the confidence of our results, as well as of a robust and unambiguous methodology for the identification of the diffuse light component, this finding suggests that the extraordinary amounts of light detected in some well-known Hickson Compact Groups, such as HCG 79 and HCG 90, cannot be made exclusively from stellar material stripped out of their member galaxies. Finally, in agreement with theoretical predictions, our simulations confirm that the selective merging that takes place in unrelaxed poor groups can transform an initially Schechter-like stellar mass distribution function into a bimodal one." @default.
• W3008680503 created "2020-03-06" @default.
• W3008680503 creator A5012156302 @default.
• W3008680503 date "2013-01-01" @default.
• W3008680503 modified "2023-09-24" @default.
• W3008680503 title "Formation and dynamics of groups of galaxies in the local universe" @default.
• W3008680503 hasPublicationYear "2013" @default.
• W3008680503 type Work @default.
• W3008680503 sameAs 3008680503 @default.
• W3008680503 citedByCount "0" @default.
• W3008680503 crossrefType "journal-article" @default.
• W3008680503 hasAuthorship W3008680503A5012156302 @default.
• W3008680503 hasConcept C121332964 @default.
• W3008680503 hasConcept C1276947 @default.
• W3008680503 hasConcept C146867326 @default.
• W3008680503 hasConcept C159249277 @default.
• W3008680503 hasConcept C160147972 @default.
• W3008680503 hasConcept C174802034 @default.
• W3008680503 hasConcept C205327720 @default.
• W3008680503 hasConcept C22540661 @default.
• W3008680503 hasConcept C2779652233 @default.
• W3008680503 hasConcept C37119246 @default.
• W3008680503 hasConcept C44870925 @default.
• W3008680503 hasConcept C84999194 @default.
• W3008680503 hasConcept C98444146 @default.
• W3008680503 hasConceptScore W3008680503C121332964 @default.
• W3008680503 hasConceptScore W3008680503C1276947 @default.
• W3008680503 hasConceptScore W3008680503C146867326 @default.
• W3008680503 hasConceptScore W3008680503C159249277 @default.
• W3008680503 hasConceptScore W3008680503C160147972 @default.
• W3008680503 hasConceptScore W3008680503C174802034 @default.
• W3008680503 hasConceptScore W3008680503C205327720 @default.
• W3008680503 hasConceptScore W3008680503C22540661 @default.
• W3008680503 hasConceptScore W3008680503C2779652233 @default.
• W3008680503 hasConceptScore W3008680503C37119246 @default.
• W3008680503 hasConceptScore W3008680503C44870925 @default.
• W3008680503 hasConceptScore W3008680503C84999194 @default.
• W3008680503 hasConceptScore W3008680503C98444146 @default.
• W3008680503 hasLocation W30086805031 @default.
• W3008680503 hasOpenAccess W3008680503 @default.
• W3008680503 hasPrimaryLocation W30086805031 @default.
• W3008680503 hasRelatedWork W1552192234 @default.
• W3008680503 hasRelatedWork W1559538028 @default.
• W3008680503 hasRelatedWork W2017438327 @default.
• W3008680503 hasRelatedWork W2019379764 @default.
• W3008680503 hasRelatedWork W2035922728 @default.
• W3008680503 hasRelatedWork W2051372562 @default.
• W3008680503 hasRelatedWork W2089041540 @default.
• W3008680503 hasRelatedWork W2090723058 @default.
• W3008680503 hasRelatedWork W2133225317 @default.
• W3008680503 hasRelatedWork W2135474819 @default.
• W3008680503 hasRelatedWork W2147465257 @default.
• W3008680503 hasRelatedWork W2403647066 @default.
• W3008680503 hasRelatedWork W2403755593 @default.
• W3008680503 hasRelatedWork W2570092160 @default.
• W3008680503 hasRelatedWork W2772029377 @default.
• W3008680503 hasRelatedWork W2981580218 @default.
• W3008680503 hasRelatedWork W3013578539 @default.
• W3008680503 hasRelatedWork W3098283198 @default.
• W3008680503 hasRelatedWork W3101590468 @default.
• W3008680503 hasRelatedWork W3124610699 @default.
• W3008680503 isParatext "false" @default.
• W3008680503 isRetracted "false" @default.
• W3008680503 magId "3008680503" @default.
• W3008680503 workType "article" @default.