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 “"quiescent galaxies"”.
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Optical surveys of AGN and their host galaxies
… (AGNs) surveys. The first survey deals with galaxies that host low-level AGNs (LLAGN) and aims at identifying such galaxies by quantifying their variability. While numerous studies have shown that AGNs can be variable at all wavelengths, the nature of the variability is still not well …
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A Study on Quenching and Galaxy Growth in z~1 Clusters using HST WFC3 Grism Observations
… to study how the quenching of star formation in galaxies and galaxy size growth operates in different environments at this redshift. The unique capabilities of space-based slitless spectroscopy with the G141 grism allows for the construction of spatially resolved H$\alpha$ maps, providing the …
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Quenching mechanisms in recently quenched elliptical galaxies: insights from neutral hydrogen studies and environmental analysis
Recently Quenched Elliptical galaxies (RQEs) represent a critical phase in the transition from star-forming to quiescent galaxies. However, the mechanisms driving their quenching remain elusive. We conduct a multi-wavelength analysis of 695 RQEs, along with their precursors (preRQEs) and …
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Cosmology with Velocity Dispersion based Counts of Groups and the Effect of AGN Feedback on Host Galaxy Morphology
… velocity dispersion of the cluster galaxies. I show that the velocity dispersion of groups/clusters can be theoretically predicted as robustly as mass but, unlike mass, it can also be directly observed, thus circumventing the main systematic bias in traditional cluster counts …
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Core-collapse supernovae in the great survey era
… due to unexpected large dust obscuration in host galaxies, or because some core-collapse events proceed directly to black hole formation and fail to give an optical outburst. Another way to uncover optically invisible supernovae would be the next generation radio telescope, the Square Kilometer …
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Star formation, quenching and chemical enrichment in local galaxies from integral field spectroscopy
… chemical abundances to resolved scales within galaxies by using integral field spectroscopy (IFS) data, mostly from the ongoing SDSS- IV MaNGA survey. In the first part of this thesis I demonstrate the ubiquitous presence of extended low ionisation emission-line regions (LIERs) in both late- …
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Insights into the nature of dust attenuation in relation to galaxy evolution from local to cosmic noon galaxies
The dust attenuation in galaxies depends on numerous processes and physical properties, such as the stellar mass, the star formation rate (SFR), the metallicity, the star formation history (SFH), and the star-dust geometry, which also involves morphology and inclination. Throughout the work in this …
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Spatially resolved star formation and quenching: insights from observations and simulations
… conditions between z ~ 0 and z ~ 2, such that galaxies in the past were more star-forming and gas-rich. Given the complexity of the star formation histories of galaxies, it is not trivial to pinpoint the exact physical mechanisms responsible for the decline from z ~ 2 to z ~ 0. To do so, it is …
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Spatially resolved star formation and quenching: insights from observations and simulations
… conditions between z ~ 0 and z ~ 2, such that galaxies in the past were more star-forming and gas-rich. Given the complexity of the star formation histories of galaxies, it is not trivial to pinpoint the exact physical mechanisms responsible for the decline from z ~ 2 to z ~ 0. To do so, it is …
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The relationship between the morphology and kinematics of galaxies and its dependence on dark matter halo structure in simulated galaxies
Galaxies are among nature’s most majestic and diverse structures. They can play host to as few as several thousands of stars, or as many as hundreds of billions. They exhibit a broad range of shapes, sizes, colours, and they can inhabit vastly differing cosmic environments. The physics of galaxy …
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Demographics of supermassive black holes
… component of the universe in general and of galaxies in particular. Almost every massive galaxy harbours a supermassive black hole (SMBH) in its center. Furthermore, there is a close connection between the growth of the SMBH and the evolution of its host galaxy, manifested in the relationship …