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.
Results
Showing 1 to 9 of 9 for “"Type Ia supernova"”.
-
The type IA supernova rate in intermediate redshift galaxy clusters
Studies of Type Ia supernovae (SNe Ia) in galaxy clusters can tell us about the metal enrichment of the intra-cluster medium, constrain the star formation history of cluster galaxies, aid us in the investigations of the progenitor systems of SNe Ia, act as tracers of the intra-cluster stellar …
-
Hierarchical Bayesian Models for Investigating Astrophysical Systematics in Type Ia Supernova Cosmology
Type Ia supernovae (SNe Ia) are stellar explosions, and standardisable candles, used to estimate luminosity distances and constrain cosmological parameters. With increasing SN Ia sample sizes (≳ 1000 objects), systematic uncertainties in SN distance estimates now dominate inferences in SN …
-
SALT spectroscopy and classification of supernova spectra using Bayesian techniques
… Telescope spectroscopic follow-up programme for supernova candidates discovered by the international Dark Energy Survey, the goals of which are to measure the expansion history of the Universe and shed light on the mysterious nature of dark energy. In total, we took spectra for 36 supernova …
-
The core collapse supernova rate in the sdss-ii supernova survey
<p>The Sloan Digital Sky Survey II Supernova Survey (SDSS-II SN), though designed as a type Ia supernova search for cosmology, also discovered a large sample of core collapse supernovae (CCSN). I use the SDSS-II SN data to measure the volumetric CCSN rate in the redshift range (0.03 < z < 0.09), …
-
On understanding the lives of dead stars : Supernova Remnant N103B, radio pulsar B1951+32, and the Rabbit
… Grating Spectrometer, we observed the young Supernova Remnant N103B in the Large Magellanic Cloud as part of the Guaranteed Time Observation program. N103B has a small overall extent and shows substructure on arcsecond spatial scales. The spectrum, based on 116ks of data, reveals unambiguous …
-
A review of the Hubble tension
… luminosity and distance measurements from a Type Ia Supernova (SNIa) distance ladder, has now reached 4.2σ. Despite improvements in precision, this tension has increased. This thesis studies these two measurements, as well as various other H0 determinations, which are independent of both the …
-
Supernovae as gamma ray emitters from the MeV to the TeV
"Gamma rays offer unique probes of supernovae as cosmic-ray accelerators and as nucleosynthesis sites. My thesis work focuses on how to explore these two aspects of supernovae. (1) Both starburst galaxies and ultra luminous infrared galaxies are new gamma-ray source classes discovered by Fermi and …
-
Hierarchical Bayesian Spectro-temporal Models of Type Ia Supernovae in the Optical and Near-Infrared: Understanding the Properties of Dust in Supernova Host Galaxies
… Grace Roman Space Telescope both on the horizon, Type Ia supernova (SN Ia) cosmology is about to undergo a paradigm shift. Whilst this new era has the potential to bring unprecedented constraints on the nature of dark energy, this will only be possible if we are able to overcome the considerable …
-
Cosmology Using Photometric Samples of Type Ia Supernovae: The First Joint Photometric Light Curve Analysis
<p>Over the last twenty five years, type Ia supernova (SNIa) have been a crucial cosmological probe, responsible for the discovery of the accelerating expansion of the universe. But with the dawn of the next generation of telescopes and SNIa samples, new methods and techniques are needed to …