Effect of lensing magnification on type Ia supernova cosmology

Sakakibara, Hinako; Nishizawa, Atsushi J.; Oguri, Masamune; Tanaka, Masayuki; Hsieh, Bau-Ching; Wong, Kenneth C.

doi:10.1093/mnras/stz1117

Cited by 5 publications

(5 citation statements)

References 72 publications

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“…Finally, we correct the distance modulus for the magnification for individual SNe and find that the effect of magnification on the cosmological parameter estimation, Ω m , w are at most 3% which is marginally consistent with previous works (Jönsson et al, 2008;Sarkar et al, 2008). The future Sakakibara et al (2019). Constraints on Ω m0 and w from SNe sample corrected for magnification (red dotted) and not corrected (blue dashed).…”

Section: Discussionsupporting

confidence: 85%

See 1 more Smart Citation

Effect of gravitational lensing on supernova cosmology

Nishizawa¹,

Sakakibara²,

Oguri³

et al. 2019

Proceedings of the 4th KMI International Symposium — PoS(KMI2019)

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As a measurement of distance modulus for type Ia supernovae becomes more stringent, it is important to study various systematics for the unbiased measurement of cosmological parameters. In this paper, the effects of gravitational lensing magnification on the measurement of supernovae distance modulus and estimation of cosmological parameters are presented. Method: We use Hyper Suprime-Cam survey data to estimate the interbening large-scale structure. Two distinct methods are applied; one based on weak lensing mass reconstruction and the other based on the galaxy distribution. Then those estimations are converted to predict the possible magnification of individual supernova. Results: We find a very weak correlation between the Hubble residuals and magnification and that the Ω m and dark energy parameter w alters best fit values by O(1)% level. Conclusion: The effect of magnification can be vanishingly small given the current SNLS supernovae sample; however, it becomes important in the era of LSST and WFIRST where the number of supernovae is dramatically increase.

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Section: Discussionsupporting

confidence: 85%

“…Table quoted fromSakakibara et al (2019). Best-fit values of each parameters estimated by MCMC method.…”

mentioning

confidence: 99%

Effect of gravitational lensing on supernova cosmology

Nishizawa¹,

Sakakibara²,

Oguri³

et al. 2019

Proceedings of the 4th KMI International Symposium — PoS(KMI2019)

Self Cite

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“…Along with the underlying cosmology, physical processes such as the magnification/de-magnification of the SN magnitudes by large-scale structures (Wambsganss et al 1997;Wang 1999;Jönsson et al 2009;Sakakibara et al 2019) may also introduce magnitude evolution that cannot be accounted for by SN standardization methods. The magnification probability is a function of redshift.…”

Section: Cosmological Parameters and Systematic Effectsmentioning

confidence: 99%

Constraints on Cosmological Parameters with a Sample of Type Ia Supernovae from JWST

Liu

Wang

Chen

et al. 2022

ApJ

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We investigate the potential of using a sample of very high-redshift (2 ≲ z ≲ 6) (VHZ) Type Ia supernovae (SNe Ia) attainable by JWST on constraining cosmological parameters. At such high redshifts, the age of the universe is young enough that the VHZ SN Ia sample comprises the very first SNe Ia of the universe, with progenitors among the very first generation of low-mass stars that the universe has made. We show that the VHZ SNe Ia can be used to disentangle systematic effects due to the luminosity distance evolution with redshifts intrinsic to SN Ia standardization. Assuming that the systematic evolution can be described by a linear or logarithmic formula, we found that the coefficients of this dependence can be determined accurately and decoupled from cosmological models. Systematic evolution as large as 0.15 mag and 0.45 mag out to z = 5 can be robustly separated from popular cosmological models for linear and logarithmic evolution, respectively. The VHZ SNe Ia will lay the foundation for quantifying the systematic redshift evolution of SN Ia luminosity distance scales. When combined with SN Ia surveys at comparatively lower redshifts, the VHZ SNe Ia allow for the precise measurement of the history of the expansion of the universe from z ∼ 0 to the epoch approaching reionization.

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“…At the same time, the crosscorrelation between galaxy and supernovae magnification itself has not been conclusively detected with current data yet. For recent trials, see [28][29][30]. The opportunities with future surveys such as the LSST should be wide-ranging, see [31] and our investigations in Sec.…”

Section: Introductionmentioning

confidence: 97%

Geometrical constraints on curvature from galaxy-lensing cross-correlations

Zhang,

Fang

2021

Preprint

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Accurate constraints on curvature provide a powerful probe of inflation. However, curvature constraints based on specific assumptions of dark energy may lead to unreliable conclusions when used to test inflation models. To avoid this, it is important to obtain constraints that are independent on assumptions for dark energy. In this paper, we investigate such constraints on curvature from the geometrical probe constructed from galaxy-lensing cross-correlations. We study comprehensively the cross-correlations of galaxy with magnification, measured from type Ia supernovae's brightnesses ("gκ SN "), with shear ("gκ g "), and with CMB lensing ("gκ CMB "). We find for the LSST and Stage IV CMB surveys, "gκ SN " , "gκ g " and "gκ CMB " can be detected with signal-to-noise ratio S/N = 104, 2291, 1842 respectively. When combined with supernovae Hubble diagram ("SN") to constrain curvature, we find galaxy-lensing cross-correlation becomes increasingly important with more degrees of freedom allowed in dark energy. Without any priors, we obtain error on ΩK of 0.723 from "SN + gκ SN ", 0.0417 from "SN + gκ g ", and 0.04 from "SN + gκ g + gκ CMB " for the LSST and Stage IV CMB surveys. The last one is more competitive than a Stage IV BAO survey ("BAO"). When galaxy-lensing cross-correlations are added to the combined probe of "SN + BAO + CMB", where "CMB" stands for Planck measurement for the CMB acoustic scale, we obtain constraint on ΩK of 0.0013, which is a factor of 7 improvement from "SN + BAO + CMB". We study improvements in these results from increasing the high redshift extension of supernovae.

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Effect of lensing magnification on type Ia supernova cosmology

Cited by 5 publications

References 72 publications

Effect of gravitational lensing on supernova cosmology

Effect of gravitational lensing on supernova cosmology

Constraints on Cosmological Parameters with a Sample of Type Ia Supernovae from JWST

Geometrical constraints on curvature from galaxy-lensing cross-correlations

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