Matches in SemOpenAlex for { <https://semopenalex.org/work/W87422486> ?p ?o ?g. }
Showing items 1 to 82 of
82
with 100 items per page.
- W87422486 abstract "This thesis investigates the dynamics of the local Universe with particular reference to discovering the source of the Local Group (LG) motion. A redshift survey of the Great Attractor (GA) region, thought responsible for a significant fraction of the LG motion, is presented. Over 3053 galaxies, located in both clusters and filaments, were targeted using the 2dF on the AAT. Velocity distributions and mass estimates for nine clusters are reported. Together with redshifts from the literature, this survey reveals the dominant feature in the core of the GA to be a large filament extending from Abell S0639 (l= 281o, b=+11o) towards a point at I ~ 5o b ~ -50o , encompassing the Cen-Crux, CIZA J1324.7-5736, Norma and Pavo II clusters. A new model of the local velocity field out to ՅՕՕh(^-1) Мрc is derived from the combined REFLEX, BCS and CIZA surveys: the RBC catalogue. This is the first all-sky, X-ray selected galaxy cluster sample. The reconstruction includes an intrinsic correction for the bias of clusters in tracing the total density field. The velocity fields from both this reconstruction and that of the PSCz survey are compared to the observed peculiar velocities of 98 local type la supernovae (SNIa). The best fits are respectively found for values of βRBC(= Ω(^0.6)m /(^b)RBC) = 0.39±0.20 and βι = 0.55±0.06. These results are found to be robust to culls of the SNIa sample by distance, host-galaxy extinction and the reference frame in which the comparison is carried out. As the PSCz preferentially samples late-type galaxies, the derived density field under- Samples the contributions from regions of greatest over density, precisely the regions traced by the RBC survey. When combined in the ratio 78% PSCz, 22% RBC these two complimentary reconstructions are a better fit to the ресuliar velocities of the same SNIa sample than either one alone. Compared to galaxy surveys, which only see contributions to the LG motion from structures within -60h(^-1) Мрc, previous cluster surveys have argued that sources at much greater distances (~150h(^-1) Mpc) influence local dynamics. However, the RBC reconstruction presented here shows similar contributions from the same depths as the PSCz, which is partly attributed to the intrinsic bias correction and inclusion of the Virgo cluster in the RBC. The extended GA region, defined as the volume enclosed by 250 < / <350o, 一45 < ь < 45o and 2000 <cz< 6000 km s (^-1) is found to be responsible for 65% of the LG motion, whilst the more distant (~ 145h(^-1) Mpc) SSC only accounts for 12%." @default.
- W87422486 created "2016-06-24" @default.
- W87422486 creator A5052208759 @default.
- W87422486 date "2007-01-01" @default.
- W87422486 modified "2023-09-27" @default.
- W87422486 title "The large-scale structure and dynamics of the local universe" @default.
- W87422486 hasPublicationYear "2007" @default.
- W87422486 type Work @default.
- W87422486 sameAs 87422486 @default.
- W87422486 citedByCount "0" @default.
- W87422486 crossrefType "dissertation" @default.
- W87422486 hasAuthorship W87422486A5052208759 @default.
- W87422486 hasConcept C101991246 @default.
- W87422486 hasConcept C120665830 @default.
- W87422486 hasConcept C121332964 @default.
- W87422486 hasConcept C127592171 @default.
- W87422486 hasConcept C14228908 @default.
- W87422486 hasConcept C150846664 @default.
- W87422486 hasConcept C156055797 @default.
- W87422486 hasConcept C164866538 @default.
- W87422486 hasConcept C176673079 @default.
- W87422486 hasConcept C177272240 @default.
- W87422486 hasConcept C192975764 @default.
- W87422486 hasConcept C199360897 @default.
- W87422486 hasConcept C2779652233 @default.
- W87422486 hasConcept C33024259 @default.
- W87422486 hasConcept C37119246 @default.
- W87422486 hasConcept C41008148 @default.
- W87422486 hasConcept C44870925 @default.
- W87422486 hasConcept C54355233 @default.
- W87422486 hasConcept C73329638 @default.
- W87422486 hasConcept C84999194 @default.
- W87422486 hasConcept C86803240 @default.
- W87422486 hasConcept C98444146 @default.
- W87422486 hasConceptScore W87422486C101991246 @default.
- W87422486 hasConceptScore W87422486C120665830 @default.
- W87422486 hasConceptScore W87422486C121332964 @default.
- W87422486 hasConceptScore W87422486C127592171 @default.
- W87422486 hasConceptScore W87422486C14228908 @default.
- W87422486 hasConceptScore W87422486C150846664 @default.
- W87422486 hasConceptScore W87422486C156055797 @default.
- W87422486 hasConceptScore W87422486C164866538 @default.
- W87422486 hasConceptScore W87422486C176673079 @default.
- W87422486 hasConceptScore W87422486C177272240 @default.
- W87422486 hasConceptScore W87422486C192975764 @default.
- W87422486 hasConceptScore W87422486C199360897 @default.
- W87422486 hasConceptScore W87422486C2779652233 @default.
- W87422486 hasConceptScore W87422486C33024259 @default.
- W87422486 hasConceptScore W87422486C37119246 @default.
- W87422486 hasConceptScore W87422486C41008148 @default.
- W87422486 hasConceptScore W87422486C44870925 @default.
- W87422486 hasConceptScore W87422486C54355233 @default.
- W87422486 hasConceptScore W87422486C73329638 @default.
- W87422486 hasConceptScore W87422486C84999194 @default.
- W87422486 hasConceptScore W87422486C86803240 @default.
- W87422486 hasConceptScore W87422486C98444146 @default.
- W87422486 hasLocation W874224861 @default.
- W87422486 hasOpenAccess W87422486 @default.
- W87422486 hasPrimaryLocation W874224861 @default.
- W87422486 hasRelatedWork W1494208700 @default.
- W87422486 hasRelatedWork W1508224519 @default.
- W87422486 hasRelatedWork W1638506715 @default.
- W87422486 hasRelatedWork W1934598717 @default.
- W87422486 hasRelatedWork W1971927866 @default.
- W87422486 hasRelatedWork W1973014996 @default.
- W87422486 hasRelatedWork W1976620664 @default.
- W87422486 hasRelatedWork W2003055164 @default.
- W87422486 hasRelatedWork W2022904217 @default.
- W87422486 hasRelatedWork W2050731658 @default.
- W87422486 hasRelatedWork W2120944638 @default.
- W87422486 hasRelatedWork W2140565311 @default.
- W87422486 hasRelatedWork W2950806323 @default.
- W87422486 hasRelatedWork W2951713152 @default.
- W87422486 hasRelatedWork W3007262519 @default.
- W87422486 hasRelatedWork W3026814807 @default.
- W87422486 hasRelatedWork W3098715627 @default.
- W87422486 hasRelatedWork W3105556382 @default.
- W87422486 hasRelatedWork W3106084320 @default.
- W87422486 isParatext "false" @default.
- W87422486 isRetracted "false" @default.
- W87422486 magId "87422486" @default.
- W87422486 workType "dissertation" @default.