The Next Generation of Cosmological Measurements with Type Ia Supernovae

Scolnic, Dan; Perlmutter, S.; Aldering, G.; Brout, D.; Davis, Tamara M.; Filippenko, A. V.; Foley, R. J.; Hložek, Renée; Hounsell, R.; Jones, D. O.; Kelly, Pat; Kessler, R.; Kim, Alex; Rubin, David T.; Riess, Adam G.; Rodney, S.; Roberts-Pierel, J.; Stubbs, C. W.; Wang, Yun; Asorey, J.; Avelino, Arturo; Bavdhankar, Chetan; Brown, P. J.; Challinor, A.; Balland, C.; Cooray, Asantha; Dhawan, Suhail; Dimitriadis, G.; Dvorkin, Cora; Guy, J.; Handley, Will; Keeley, Ryan E.; Kneib, Jean-Paul; L’Huillier, Benjamin; Lattanzi, M.; Mandel, Kaisey S.; Mertens, James B.; Rigault, M.; Motloch, Pavel; Mukherjee, Suvodip; Narayan, Gautham; Nomerotski, A.; Page, Lyman A.; Pogosian, Levon; Puglisi, Giuseppe; Raveri, Marco; Regnault, Nicolas; Rest, A.; Rojas-Bravo, C.; Šako, M.; Shi, Feng; Sridhar, Srivatsan; Suzuki, Aritoki; Tsai, Yu-Dai; Wood‐Vasey, W. M.; Copin, Y.; Zhao, Gong-Bo; Zhu, Ningfeng

doi:10.48550/arxiv.1903.05128

Cited by 17 publications

(25 citation statements)

References 51 publications

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“…This is a large number of parameters, but not overwhelmingly so. With upcoming datasets of supernovae of type 1a in the 2020's counting hundreds of thousands of supernovae to be detected at redshifts z 2 over a large proportion of the sky -see [45] and references therein -the constraining power for unraveling the relation between luminosity distance and redshift will rise significantly. The ability to measure non-zero multipole components depend on the error budget of the cosmological catalogue used as well as the amplitudes of the multipole coefficients.…”

Section: Discussionmentioning

confidence: 99%

Multipole decomposition of the general luminosity distance 'Hubble law' -- a new framework for observational cosmology

Heinesen

2020

Preprint

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We present the luminosity distance series expansion to third order in redshift for a general space-time with no assumption on the metric tensor or the field equations prescribing it. It turns out that the coefficients of this general 'Hubble law' can be expressed in terms of a finite number of physically interpretable multipole coefficients. The multipole terms can be combined into effective direction dependent parameters replacing the Hubble constant, deceleration parameter, curvature parameter, and 'jerk' parameter of the Friedmann-Lemaître-Robertson-Walker (FLRW) class of metrics. Due to the finite number of multipole coefficients, the exact anisotropic Hubble law is given by 9, 25, 61 degrees of freedom in the O(z), O(z 2 ), O(z 3 ) vicinity of the observer respectively, where z := redshift. This makes possible model independent determination of dynamical degrees of freedom of the cosmic neighbourhood of the observer and direct testing of the FLRW ansatz. We argue that the derived multipole representation of the general Hubble law provides a new framework with broad applications in observational cosmology.

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Section: Discussionmentioning

confidence: 99%

Multipole decomposition of the general luminosity distance 'Hubble law' -- a new framework for observational cosmology

Heinesen

2020

Preprint

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“…In the near future, we expect percent-level measurements of the expansion and growth history from a large range of experiments, i.e. using maps of the Universe obtained by the Euclid satellite, measuring the peculiar motions of galaxies using Type Ia supernovae from LSST [84,85] , mapping out RSD with DESI and 4MOST, or using voids [36] . An important role will be played by the SKA telescopes performing BAO surveys and measuring weak gravitational lensing using 21 cm intensity mapping [86][87][88] .…”

Section: Futurementioning

confidence: 99%

Cosmology intertwined III: fσ8 and S8

Valentino

Anchordoqui

Akarsu

et al. 2021

Astroparticle Physics

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263

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“…Dust extinction is considered the most important systematic uncertainty for SNe Ia cosmology (Scolnic et al 2019). Understanding better the intrinsic light curves will provide the better study the physical properties and the evolution of SNe Ia (Burns et al 2014) and allows a precise measurement of cosmological constant and more precise constraint on dark energy.…”

Section: Effect Of Ratd On Sne Ia Colors and Light Curvesmentioning

confidence: 99%

“…Intrinsic colors and light curves of SNe Ia are critically crucial for achieving an accurate measurement of cosmological constant and better constraint of dark energy, which are the next frontiers of SNe Ia cosmology. Yet, the major systematic uncertainty arises from uncertainty in dust extinction toward SNe Ia (see, e.g., Scolnic et al 2019). Moreover, intrinsic lightcurve is essential for understanding the trigger mechanism of SNe Ia.…”

Section: Introductionmentioning

confidence: 99%

Time-varying Extinction, Polarization, and Colors of Type Ia Supernovae due to Rotational Disruption of Dust Grains

Giang¹,

Hoang²,

Tram³

2020

ApJ

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Photometric and polarimetric observations toward type Ia supernovae (SNe Ia) frequently report an unusually low total-to-selective extinction ratio (R V < 2) and small peak wavelength of polarization (λ max < 0.4 µm). Recently, Hoang et al. proposed that the increase in the abundance of small grains relative to large grains near SNe Ia due to RAdiative Torque Disruption (RATD) can explain this puzzle. To test this scenario, we will perform detailed modeling of dust extinction and polarization of SNe Ia accounting for grain disruption by RATD and grain alignment by RAdiative Torques (RATs). For dust clouds at distance d < 4 pc from the source, we find that R V decreases rapidly from the standard value of 3.1 to ∼ 1.5 after a disruption time t disr < 40 days. We then calculate the observed SNe Ia light curve and find that the colors of SNe Ia would change with time due to time-varying extinction for dust clouds at distance d < 4 pc. We also calculate the wavelength-dependence polarization produced by grains aligned with the magnetic fields by RATs. We find that λ max decreases rapidly from ∼ 0.55 µm to ∼ 0.15 µm over an alignment time of t align < 10 days due to the enhanced alignment of small grains. By fitting the theoretical polarization curve with the Serkowski law, we find that the parameter K from the Serkowski law increases when large grains are disrupted by RATD which can explain the K vs. λ max data observed for SNe Ia. Finally, we discover an anti-correlation between K and R V which might already be supported by SNe Ia observational data. Our results demonstrate the important effect of rotational disruption of dust grains by radiative torques on the time-dependent extinction, polarization, and colors of SNe Ia.

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The Next Generation of Cosmological Measurements with Type Ia Supernovae

Cited by 17 publications

References 51 publications

Multipole decomposition of the general luminosity distance 'Hubble law' -- a new framework for observational cosmology

Multipole decomposition of the general luminosity distance 'Hubble law' -- a new framework for observational cosmology

Cosmology intertwined III: fσ8 and S8

Time-varying Extinction, Polarization, and Colors of Type Ia Supernovae due to Rotational Disruption of Dust Grains

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