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Participant |
Salas, Luis | |||||||
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Institution |
Instituto de Astronomia, UNAM - Km 103 Carr Tijuana Ensenada - Ensenada - Baja California - Mexico | |||||||
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Session |
CM2-3 |
Accepted |
Yes |
Order |
99 |
Time |
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Talk |
Poster abstract |
Title |
On the use of redshift as a time parameter in the FLRW metric | |||||
| Coauthors | Salas, Luis | |||||||
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Abstract |
I comment on the different choices of time parameter that are employed to calculate proper co-moving distance in the FLWR metric. I argue that redshift is used by more authors in recent years due to a series of advantages from the observational point of view. I therefore present the geometric Alcock-Paczyński (1979) test, that has recently been used as a probe for cosmology, in the same terms and note the simplicity and symmetry of the expression. I also present the FLRW metric in terms of the redshift and the Hubble function, and show how the later replaces the need for a scaling function. |
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Pdf file |
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