Sökning: "type Ia supernova"

Visar resultat 1 - 5 av 16 avhandlingar innehållade orden type Ia supernova.

1. 1. Type Ia Supernova Cosmology : Quantitative Spectral Analysis

   Författare :Gastón Folatelli; Ariel Goobar; Enrico Cappellaro; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Supernova; Cosmology; Spectroscopy; Physics; Fysik;

   Sammanfattning : Type Ia supernovae have been successfully used as standardized candles to study the expansion history of the Universe. In the past few years, these studies led to the exciting result of an accelerated expansion caused by the repelling action of some sort of dark energy. LÄS MER

3. 2. Modeling of Radio Emission from Supernovae : Application to Type Ia

   Författare :Esha Kundu; Peter Lundqvist; Claes Fransson; Talvikki Hovatta; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Supernova; Circumstellar interaction; Radio emission; Astronomy; astronomi;

   Sammanfattning : The interaction of supernova (SN) ejecta with the circumstellar medium (CSM) drives a strong shock wave into the CSM. These shocks are ideal places where effective particle acceleration and magnetic field amplification can take place. LÄS MER

4. 3. Type Ia Supernovae : Homogeneity and Diversity

   Författare :Gabriele Garavini; Ariel Goobar; David Branch; Stockholms universitet; []
   Nyckelord :Physics;

   Sammanfattning : The use of type Ia supernovae as distance estimators has shown that about 75% of the energy content of the universe has a negative equation of state parameter and thus, drives the acceleration of the universe. Constraining the exact nature of this energy is one of the main goals in cosmology. LÄS MER

5. 4. Properties of Type Ia Supernovae : From the (intermediate) Palomar Transient Factory

   Författare :Seméli Papadogiannakis; Ariel Goobar; Rahman Amandius; Ulrich Feindt; Edward Baron; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Type Ia supernovae; cosmology; machine learning; fysik; Physics;

   Sammanfattning : Type Ia Supernovae (SNe) have been used to discover the accelerated expansion of the universe but many open questions remain unanswered. These include the stellar progenitor, extinction and possible systematic trends in the supernova brightness for different host galaxy environments or cosmic time. LÄS MER

7. 5. The Circumstellar Environment of Type Ia Supernovae

   Författare :Raphael Ferretti; Rahman Amanullah; Ariel Goobar; Josh Simon; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Type Ia supernovae; extinction; supernova cosmology; fysik; Physics;

   Sammanfattning : Type Ia supernovae (SNe Ia) have proven to be extremely useful for measuring cosmological distances and were used for the discovery of the accelerated expansion of the universe. Although thousands of SNe Ia have been observed to date, many questions surrounding the physics of the explosions and the nature of their progenitor systems remain unanswered. LÄS MER