The DOI matches its Crossref record; 60 of the 60 references it cites were found in a registry or an index.
IMPROVED DARK ENERGY CONSTRAINTS FROM ∼100 NEW CfA SUPERNOVA TYPE Ia LIGHT CURVES
Open accessAbstract
We combine the CfA3 supernova Type Ia (SN Ia) sample with samples from the literature to calculate improved constraints on the dark energy equation of state parameter, w. The CfA3 sample is added to the Union set of Kowalski et al. (2008) to form the Constitution set and, combined with a BAO prior, produces 1+w=0.013 +0.066/-0.068 (0.11 syst), consistent with the cosmological constant. The CfA3 addition makes the cosmologically-useful sample of nearby SN Ia between 2.6 and 2.9 times larger than before, reducing the statistical uncertainty to the point where systematics play the largest role. We use four light curve fitters to test for systematic differences: SALT, SALT2, MLCS2k2 (R_V=3.1), and MLCS2k2 (R_V=1.7). SALT produces high-redshift Hubble residuals with systematic trends versus color and larger scatter than MLCS2k2. MLCS2k2 overestimates the intrinsic luminosity of SN Ia with 0.7 < Delta < 1.2. MLCS2k2 with R_V=3.1 overestimates host-galaxy extinction while R_V=1.7 does not. Our investigation is consistent with no Hubble bubble. We also find that, after light-curve correction, SN Ia in Scd/Sd/Irr hosts are intrinsically fainter than those in E/S0 hosts by 2 sigma, suggesting that they may come from different populations. We also find that SN Ia in Scd/Sd/Irr hosts have low scatter (0.1 mag) and reddening. Current systematic errors can be reduced by improving SN Ia photometric accuracy, by including the CfA3 sample to retrain light-curve fitters, by combining optical SN Ia photometry with near-infrared photometry to understand host-galaxy extinction, and by determining if different environments give rise to different intrinsic SN Ia luminosity after correction for light-curve shape and color.
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Cites
Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
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Self-citationMeasurements of Ω and Λ from 42 High‐Redshift Supernovae
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BackgroundMethodSelf-citationCosmological Results from High‐z Supernovae
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Self-citationMeasurements of the Cosmological Parameters Ω and Λ from the First Seven Supernovae at z≥ 0.35
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Cited by
SEVEN-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE(WMAP) OBSERVATIONS: COSMOLOGICAL INTERPRETATION
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NINE-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE ( WMAP ) OBSERVATIONS: COSMOLOGICAL PARAMETER RESULTS
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LSST: From Science Drivers to Reference Design and Anticipated Data Products
Ivezić, Ž., Kahn, S. M., Tyson, J. A., Abel, B., Acosta, E., Allsman, R., Alonso, D., AlSayyad, Y., Anderson, S. F., Andrew, J., et al. (2019) · The Astrophysical Journal · doi:10.3847/1538-4357/ab042c · Cited by 4,357
“• Studies of known and unusual SN populations and parametrization of their light curves (e.g., Hoeflich, Wheeler & Thielemann 1998; Wang et al. 2003; Howell et al. 2007; Kowalski et al. 2008; Hicken et al. 2009; Foley 2012).”
BackgroundSelf-citationAlam, S., Aubert, M., Avila, S., Balland, C., Bautista, J. E., Bershady, M. A., Bizyaev, D., Blanton, M. R., Bolton, A. S., Bovy, J., et al. (2021) · Physical Review D · doi:10.1103/physrevd.103.083533 · Cited by 1,337
Suyu, S. H., Marshall, P. J., Auger, M. W., Hilbert, S., Blandford, R. D., Koopmans, L. V. E., Fassnacht, C. D., & Treu, T. (2010) · The Astrophysical Journal · doi:10.1088/0004-637x/711/1/201 · Cited by 454
Metadata
- Authors
- Hicken, M., Wood-Vasey, W. M., Blondin, S., Challis, P., Jha, S., Kelly, P. L., Rest, A., & Kirshner, R. P.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2009-07-10
- Volume
- 700
- Issue
- 2
- Pages
- 1097-1140
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2167435391
- Cited by
- 894
- References
- 60
- FWCI
- 70.25
- Type
- journal article
- Language
- en
- Open access
- green
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- CoChat. (2026). Citation check: IMPROVED DARK ENERGY CONSTRAINTS FROM ∼100 NEW CfA SUPERNOVA TYPE Ia LIGHT CURVES. https://app.cochat.ai/papers/10.1088/0004-637x/700/2/1097
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- Hicken, M., Wood-Vasey, W. M., Blondin, S., Challis, P., Jha, S., Kelly, P. L., Rest, A., & Kirshner, R. P. (2009). IMPROVED DARK ENERGY CONSTRAINTS FROM ∼100 NEW CfA SUPERNOVA TYPE Ia LIGHT CURVES. The Astrophysical Journal. https://doi.org/10.1088/0004-637x/700/2/1097
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