Quintessence reconstructed: New constraints and tracker viability

Sahlen, Martin, Liddle, Andrew R. and Parkinson, David (2007) Quintessence reconstructed: New constraints and tracker viability. Physical Review D: Particles Fields Gravitation and Cosmology, 75 2: . doi:10.1103/PhysRevD.75.023502

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Author Sahlen, Martin
Liddle, Andrew R.
Parkinson, David
Title Quintessence reconstructed: New constraints and tracker viability
Journal name Physical Review D: Particles Fields Gravitation and Cosmology   Check publisher's open access policy
ISSN 1550-7998
1089-4918
Publication date 2007-01-15
Sub-type Critical review of research, literature review, critical commentary
DOI 10.1103/PhysRevD.75.023502
Open Access Status File (Publisher version)
Volume 75
Issue 2
Total pages 14
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Abstract 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.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Article # 023502

Document type: Journal Article
Sub-type: Critical review of research, literature review, critical commentary
Collection: School of Mathematics and Physics
 
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Created: Mon, 28 Feb 2011, 09:47:25 EST