Do Type Ia Supernovae Provide Direct Evidence for Past Deceleration of the Universe?
- 1 April 2002
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 569 (1) , 18-22
- https://doi.org/10.1086/338580
Abstract
Observations of SN 1997ff at z ~ 1.7 favor the accelerating universe interpretation and provide some direct evidence that the universe was once decelerating. We show that the strength of this conclusion depends upon the nature of the dark energy causing the present acceleration. Only for a cosmological constant is the SNe evidence definitive. Using a new test which is independent of the contents of the universe, we show that the SN data favor recent acceleration (z < 0.5) and past deceleration (z > 0.5).Keywords
All Related Versions
This publication has 28 references indexed in Scilit:
- Probing dark energy: Methods and strategiesPhysical Review D, 2001
- Cosmology from MAXIMA-1, BOOMERANG, and COBE DMR Cosmic Microwave Background ObservationsPhysical Review Letters, 2001
- Type Ia Supernovae, Evolution, and the Cosmological ConstantThe Astrophysical Journal, 2000
- Intergalactic Dust and Observations of Type Ia SupernovaeThe Astrophysical Journal, 1999
- High‐Redshift Supernovae in the Hubble Deep FieldThe Astrophysical Journal, 1999
- Dust versus Cosmic AccelerationThe Astrophysical Journal, 1999
- Supernova Limits on the Cosmic Equation of StateThe Astrophysical Journal, 1998
- Constraints on Cosmological Models from [ITAL]Hubble Space Telescope[/ITAL] Observations of High-[CLC][ITAL]z[/ITAL][/CLC] SupernovaeThe Astrophysical Journal, 1998
- Quintessential Cosmology Novel Models of Cosmological Structure FormationAstrophysics and Space Science, 1998
- The Second-Order Term in the Redshift-Magnitude RelationPublications of the Astronomical Society of the Pacific, 1956