Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"ram-pressure stripping"”.
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Simulating the dynamical evolution of galaxies in group and cluster environments
… quiescent environments to develop a theoretical framework to understand some of the physics of galaxy transformation in cluster environments. Galaxies can be transformed in smaller groups before they are accreted by their eventual massive cluster environments, an effect termed `pre-processing'. …
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Neutral Hydrogen in Local Group Dwarf Galaxies
… to those at larger galactocentric distances. Ram-pressure arguments are invoked, which suggest halo densities greater than 0.0002-0.0003 per cubic centimeter out to distances of at least 70 kpc, values which are consistent with theoretical models and suggest the halo may harbor a large …
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Observing galaxies in the Southern Filament of the Virgo Cluster with KAT-7 and WSRT
… NGC 4424 is a post-merger galaxy undergoing a ram pressure stripping as it falls into the centre of the Virgo Cluster along a filamentary structure. We also give the HI parameters of the galaxies detected.
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The Impact of realistic galaxy orbits on jellyfish galaxy properties
… the space between galaxies in galaxy clusters, ram pressure stripping (RPS) can remove large fractions of the interstellar and circumgalactic gas of galaxies. This process creates jellyfish galaxies with tails extending up to 100 kpc, and transforms star-forming spirals into quenched galaxies. …
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The Effects of Radial Migration on the Outskirts of Disc Galaxies
… these changes occur rapidly after the onset of ram pressure stripping. Finally I consider the effects of migration in disc galaxies with strong warps. I find that the warp remains isolated from the mixing effect of migration and thus forms a tight relation between age and metallicity. Stars …
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Investigating the Environmental Properties of Galaxies in the SDSS-MaNGA Survey
… to study the effects of minor mergers and tidal/ram pressure stripping, I find that central galaxies are up to 30% larger and more massive than satellites. I suggest that minor mergers play a crucial role in the increase in size and mass of centrals. In addition, I find that satellites have a …
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Towards AMR Simulations of Galaxy Formation
… In chapter 5 we develop an analytic model for ram pressure stripping of the hot gaseous haloes of galaxies in groups and clusters. We test the model against a suite of hydrodynamic simulations in the SPH GADGET-2 code. To ensure that the spurious suppression of hydrodynamic instabilities by SPH …
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Polarimetric observations at low radio frequencies
… Faraday components for sources that are well-parameterised by a single RM. A sample of nine galaxies from two Southern Compact Groups are then presented, with constraints being placed on the polarised fraction, RM, spectral index, star formation rate, companion sources, and hydrodynamical state. …
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A Multiwavelength Analysis of the Effect of Cluster Environments on Galaxy Evolution
… in the cluster environment such as through ram-pressure stripping is potentially dominating over any internal processes that deplete the gas supply. Observations focusing on the cores of clusters reveal that galaxies are typically already quenched and in a passive state, indicating that the …
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A Westerbork blind HI imaging survey of the Perseus-Pisces filament in the Zone of Avoidance
… through the (J − K) vs K colour-magnitude diagram to identify the gas-poor cluster member candidates. Within the spatial extent of the cluster of radius ~ 1.7 Mpc, a total of 261 galaxies are identified as cluster members, with 23 detected in HI. An assessment of the morphologies of these …
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A Study on Quenching and Galaxy Growth in z~1 Clusters using HST WFC3 Grism Observations
The work in this thesis uses 38 orbits worth of $\textit{Hubble Space Telescope}$ (HST), $\textit{Wide Field Camera 3}$ (WFC3) infrared F140W imaging and G141 grism data on 10 galaxy clusters at $z\sim1$ to study how the quenching of star formation in galaxies and galaxy size growth operates in …