NDLI: Supernovae and cosmology

Content Provider	Springer Nature Link
Author	Leibundgut, Bru
Copyright Year	2007
Abstract	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.
Starting Page	221
Ending Page	248
Page Count	28
File Format	PDF
ISSN	00017701
Journal	General Relativity and Gravitation
Volume Number	40
Issue Number	2-3
e-ISSN	15729532
Language	English
Publisher	Springer US
Publisher Date	2007-12-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Astronomy, Astrophysics and Cosmology Quantum Physics Differential Geometry Relativity and Cosmology Mathematical and Computational Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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