First-year Sloan Digital Sky Survey-II (SDSS-II) supernova results: consistency and constraints with other intermediate-redshift datasets

Journal Article · Thu Oct 01 00:00:00 EDT 2009 · Mon.Not.Roy.Astron.Soc.

DOI:https://doi.org/10.1111/j.1365-2966.2009.15851.x· OSTI ID:3019614

Lampeitl, H. ^[1]; Nichol, R. C. ^[1]; Seo, H. J. ^[2]; Giannantonio, T. ^[3]; Shapiro, C. ^[1]; Bassett, B. ^[4]; Percival, W. J. ^[1]; Davis, T. M. ^[5]; Dilday, B. ^[6]; Frieman, J. ^[7]; Garnavich, P. ^[8]; Sako, M. ^[9]; Smith, M. ^[10]; Sollerman, J. ^[11]; Becker, A. C. ^[12]; Cinabro, D. ^[13]; Filippenko, A. V. ^[14]; Foley, R. J. ^[15]; Hogan, C. J. ^[2]; Holtzman, J. A. ^[16] ; Jha, S. W. ^[6]; Konishi, K. ^[17]; Marriner, J. ^[2]; Richmond, M. W. ^[18]; Riess, A. G. ^[19]; Schneider, D. P. ^[20]; Stritzinger, M. ^[21]; van der Heyden, K. J. ^[22]; VanderPlas, J. T. ^[12]; Wheeler, J. C. ^[23]; Zheng, C. ^[24]

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1. Portsmouth U., ICG
2. Fermilab
3. Portsmouth U., ICG; Bonn U.
4. Cape Town U., Dept. Math.; South African Astron. Observ.
5. Queensland U.; Bohr Inst.
6. Rutgers U., Piscataway
7. Fermilab; Chicago U., KICP
8. Notre Dame U.
9. Pennsylvania U.
10. Portsmouth U., ICG; Cape Town U., Dept. Math.
11. Bohr Inst.; Stockholm U.
12. Washington U., Seattle, Astron. Dept.
13. Wayne State U.
14. UC, Berkeley
15. UC, Berkeley; Harvard-Smithsonian Ctr. Astrophys.
16. New Mexico State U.
17. Tokyo U., ICRR; Tokyo U.
18. Rochester Inst. Tech.
19. Johns Hopkins U.; Baltimore, Space Telescope Sci.
20. Penn State U.
21. Bohr Inst.; Carnegie Inst. Observ.
22. Cape Town U.
23. Texas U.
24. Stanford U., Phys. Dept.

We present an analysis of the luminosity distances of Type Ia Supernovae from the Sloan Digital Sky Survey-II (SDSS-II) Supernova Survey in conjunction with other intermediate redshift (z<0.4) cosmological measurements including redshift-space distortions from the Two-degree Field Galaxy Redshift Survey (2dFGRS), the Integrated Sachs-Wolfe (ISW) effect seen by the SDSS, and the latest Baryon Acoustic Oscillation (BAO) distance scale from both the SDSS and 2dFGRS. We have analysed the SDSS-II SN data alone using a variety of 'model-independent' methods and find evidence for an accelerating universe at >97% level from this single dataset. We find good agreement between the supernova and BAO distance measurements, both consistent with a Lambda-dominated CDM cosmology, as demonstrated through an analysis of the distance duality relationship between the luminosity (d_L) and angular diameter (d_A) distance measures. We then use these data to estimate w within this restricted redshift range (z<0.4). Our most stringent result comes from the combination of all our intermediate-redshift data (SDSS-II SNe, BAO, ISW and redshift-space distortions), giving w = -0.81 +0.16 -0.18(stat) +/- 0.15(sys) and Omega_M=0.22 +0.09 -0.08 assuming a flat universe. This value of w, and associated errors, only change slightly if curvature is allowed to vary, consistent with constraints from the Cosmic Microwave Background. We also consider more limited combinations of the geometrical (SN, BAO) and dynamical (ISW, redshift-space distortions) probes.

• Research Organization: UC, Berkeley; Baltimore, Space Telescope Sci.; Washington U., Seattle, Astron. Dept.; New Mexico State U.; Penn State U.; Queensland U.; Carnegie Inst. Observ.; Stanford U., Phys. Dept.; Tokyo U., ICRR; Rochester Inst. Tech.; Notre Dame U.; Pennsylvania U.; Chicago U., KICP; Portsmouth U., ICG; Texas U.; Harvard-Smithsonian Ctr. Astrophys.; Rutgers U., Piscataway; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Cape Town U., Dept. Math.; Bonn U.; Cape Town U.; Bohr Inst.; South African Astron. Observ.; Johns Hopkins U.; Wayne State U.; Tokyo U.; Stockholm U.
• Sponsoring Organization: US Department of Energy
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 3019614
• Report Number(s): FERMILAB-PUB-09-859-A; oai:inspirehep.net:833705; arXiv:0910.2193
• Journal Information: Mon.Not.Roy.Astron.Soc., Journal Name: Mon.Not.Roy.Astron.Soc. Vol. 401
• Country of Publication: United States
• Language: English