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PhysRevD.75.023502.pdf (1.33 MB)

Quintessence reconstructed: new constraints and tracker viability

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journal contribution
posted on 2023-06-07, 13:48 authored by M. Sahl'en, Andrew Liddle, David Parkinson
We update and extend our previous work reconstructing the potential of a quintessence field from current observational data. We extend the cosmological data set to include new supernova data, plus information from the cosmic microwave background and from baryon acoustic oscillations. We extend the modeling by considering Padé approximant expansions as well as Taylor series, and by using observations to assess the viability of the tracker hypothesis. We find that parameter constraints have improved by a factor of 2, with a strengthening of the preference of the cosmological constant over evolving quintessence models. Present data show some signs, though inconclusive, of favoring tracker models over nontracker models under our assumptions.

History

Publication status

  • Published

File Version

  • Published version

Journal

Physical Review D

ISSN

0559-2821

Issue

2

Volume

75

Pages

23502.0

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2007-02-28

First Open Access (FOA) Date

2019-08-06

First Compliant Deposit (FCD) Date

2019-08-06

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