Supernovae as Astrophysical Objects

Leibundgut, B.

doi:10.1007/1-4020-3057-6_11

Cited by 2 publications

(1 citation statement)

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“…Supernova Legacy Survey (SNLS) ( [11], [12]), the ESSENCE project [13], the Pan-STARRS survey ( [14], [15], [16]); intermediate redshift (0.05 < z < 0.4) projects viz SDSS-II supernova surveys ( [17], [18], [19], [20], [21]) and small redshift programmes such as surveys like Harvard-Smithsonian Center for Astrophysics survey [22], the Carnegie Supernova Project ( [23], [24], [25]), the Lick Observatory Supernova Search [26] and the Nearby Supernova Factory [27]. Various other compilations of SNe Ia data may be found in [28]. All such surveys include nearly one thousand SNe Ia events.…”

Section: Observational Constraints On Time-dependent Diffusive De-dm ...mentioning

confidence: 99%

Realizing interactions between dark matter and dark energy using k-essence cosmology

Bandyopadhyay

Chatterjee

2019

Mod. Phys. Lett. A

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We investigated the scenario of time-dependent diffusive interaction between dark matter and dark energy and showed that such a model can be accommodated within the observations of luminosity distance -redshift data in Supernova Ia (SNe Ia) observations. We obtain constrains on different relevant parameters of this model from the observational data. We consider a homogeneous scalar field φ(t) driven by a k−essence Lagrangian of the from L = V (φ)F (X) with constant potential V (φ) = V , to describe the dynamics of dark energy in this model. Using the temporal behaviour of the FRW scale factor, the equation of state and total energy density of the dark fluid, extracted from the analysis of SNe Ia (JLA) data, we have obtained the timedependence of the k−essence scalar field and also reconstructed form of the function F (X) in the k−essence Lagrangian.

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Section: Observational Constraints On Time-dependent Diffusive De-dm ...mentioning

confidence: 99%

Realizing interactions between dark matter and dark energy using k-essence cosmology

Bandyopadhyay

Chatterjee

2019

Mod. Phys. Lett. A

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Supernovae and cosmology

Leibundgut

2007

Gen Relativ Gravit

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The extreme luminosity and their fairly unique temporal behaviour have made supernovae a superb tool to measure distances in the universe. As complex astrophysical events they provide interesting insights into explosion physics, explosive nucleosynthesis, hydrodynamics of the explosion and radiation transport. They are an end product of stellar evolution and provide clues to the stellar composition. Since they can be observed at large distances they have become critical probes to further explore astrophysical effects, like dust properties in external galaxies and the star formation history of galaxies. Some of the astrophysics interferes with the cosmological applications of supernovae. The local velocity field, distorted by the gravitational attraction of the local large scale structure, and the reddening law appear at the moment the major limitations in the accuracy with which cosmological parameters can be determined. These absorption effects can introduce a secondary bias into the observations of the distant supernovae, which needs to be carefully evaluated. Supernovae have been used for the measurement of the Hubble constant, i.e. the current expansion rate of the universe, and the accelerated cosmic expansion directly inferred from the apparent faintness of the distant supernovae.

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Supernovae as Astrophysical Objects

Cited by 2 publications

References 50 publications

Realizing interactions between dark matter and dark energy using k-essence cosmology

Realizing interactions between dark matter and dark energy using k-essence cosmology

Supernovae and cosmology

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