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Title: The first galaxies in the Hubble Frontier Fields
Author: Bhatawdekar, Rachana
ISNI:       0000 0004 8502 3390
Awarding Body: University of Nottingham
Current Institution: University of Nottingham
Date of Award: 2019
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In this thesis we have exploited the power of gravitational lensing of massive clusters to probe galaxy evolution with the galaxy stellar mass functions (GSMF) and UV luminosity functions (UV LF) at z=6-9. Throughout the thesis the data utilized is from the Hubble Frontier Fields (HFF) program. We present new measurements of the evolution of the GSMF and UV LF for galaxies from z=6-9 within the HFF cluster MACSJ0416.1-2403 and its parallel field. To obtain these results, we have developed a novel method to subtract the massive foreground galaxies that lie close to the critical line from the MACSJ0416.1-2403 cluster, allowing for a deeper and cleaner detection of the faintest systems at z\geq6. We derive the stellar masses of our sample by fitting synthetic stellar population models to their observed spectral energy distribution (SED) with the inclusion of nebular emission lines. This is the deepest and most distant mass function measured to date. We also investigate, for the first time, the correlation between β and SFR and find that there is a strong correlation between β and SFR, in that galaxies with low SFRs exhibit bluer slopes, and they also appear to get bluer with increasing redshift.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: QB Astronomy