Peculiar velocity cosmology with type Ia supernovae

Graziani, R.; Rigault, M.; Regnault, N.; Gris, Ph.; Möller, A.; Antilogus, P.; Astier, P.; Betoule, M.; Bongard, S.; Briday, M.; Cohen-Tanugi, J.; Copin, Y.; Courtois, H. M.; Fouchez, D.; Gangler, E.; Guinet, D.; Hawken, A. J.; Kim, Y. -L.; Léget, P. -F.; Neveu, J.; Ntelis, P.; Rosnet, Ph.; Nuss, E.

doi:10.48550/arxiv.2001.09095

Cited by 10 publications

(14 citation statements)

References 24 publications

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“…More broadly, our results indicate the potential for using SNe as complementary LSS probes of cosmology. This work is an important step toward using high-precision measurements of peculiar velocities in the local universe to infer the growth rate of structures through the 𝑓 𝜎 8 parameter using SNeIa (Boruah et al 2020;Kim & Linder 2020;Graziani et al 2020). Our framework includes the study of SNeIa from ZTF and the large scale structure reconstruction from BORG, naturally incorporating non-linear effects.…”

Section: Discussionmentioning

confidence: 99%

The large-scale environment of thermonuclear and core-collapse supernovae

Tsaprazi,

Jasche,

Goobar

et al. 2021

Preprint

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The new generation of wide-field time-domain surveys has made it feasible to study the clustering of supernova (SN) host galaxies in the large-scale structure (LSS) for the first time. We investigate the LSS environment of SN populations, using 106 dark matter density realisations with a resolution of ∼ 3.8 Mpc, constrained by the 2M++ galaxy survey. We limit our analysis to redshift 𝑧 < 0.036, using samples of 498 thermonuclear and 782 core-collapse SNe from the Zwicky Transient Facility's Bright Transient Survey and Census of the Local Universe catalogues. We detect clustering of SNe with high significance; the observed clustering of the two SNe populations is consistent with each other. Further, the clustering of SN hosts is consistent with that of the Sloan Digital Sky Survey (SDSS) Baryon Oscillation Spectroscopic Survey (BOSS) DR12 spectroscopic galaxy sample in the same redshift range. Using a tidal shear classifier, we classify the LSS into voids, sheets, filaments and knots. We find that both SNe and SDSS galaxies are predominantly found in sheets and filaments. SNe are significantly under-represented in voids and over-represented in knots compared to the volume fraction in these structures. This work opens the potential for using forthcoming wide-field deep SN surveys as a complementary LSS probe.

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Section: Discussionmentioning

confidence: 99%

The large-scale environment of thermonuclear and core-collapse supernovae

Tsaprazi,

Jasche,

Goobar

et al. 2021

Preprint

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“…Crucially for studies pertaining to the measurement of local large scale structure, the SNe are distributed all across the sky (e.g. Feindt et al 2013;Graziani et al 2020).…”

Section: Survey Strategymentioning

confidence: 99%

“…Moreover, the large statistics and uniform sky coverage, will help overcome existing uncertainties in inferring the growth of structure from SNe Ia (see e.g. Graziani et al 2020).…”

mentioning

confidence: 99%

The Zwicky Transient Facility Type Ia supernova survey: first data release and results

Dhawan,

Goobar,

Smith

et al. 2021

Preprint

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Type Ia supernovae (SNe Ia) in the nearby Hubble flow are excellent distance indicators in cosmology. The Zwicky Transient Facility (ZTF) has observed a large sample of supernovae from an untargeted, rolling survey, reaching 20.8, 20.6, 20.3 mag in g r, and i-band, respectively. With a FoV of 47 sq.deg, ZTF discovered > 3000 SNe Ia in a little over 2.5 years. Here, we report on the sample of 761 spectroscopically classified SNe Ia from the first year of operations (DR1). The sample has a median redshift z = 0.057, nearly a factor of two higher than the current low-z sample. Our sample has a total of 934 spectra, of which 632 were obtained with the robotic SEDm on Palomar P60. We assess the potential for precision cosmology for a total of 305 SNe with redshifts from host galaxy spectra. The sample is already comparable in size to the entire combined literature low-z anchor sample. The median first detection is 13.5 days before maximum light, about 10 days earlier than the median in the literature. Furthermore, six SNe from our sample are at D L < 80 Mpc, for which host galaxy distances can be obtained in the JWST era, such that we have calibrator and Hubble flow SNe observed with the same instrument. In the entire duration of ZTF-I, we have observed nearly fifty SNe for which we can obtain calibrator distances, key for percent level distance scale measurements.

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“…The strength of SN Ia sample is the precision of the distance estimate and the weakness (relative to the galaxy methods) is the smaller sample size. Several recent studies have investigated this method in considerable detail and find that the SN approach is promising provided the SN sample is in the many thousands (see, in particular, Agrawal et al 2019;Graziani et al 2020;Kim & Linder 2020). In addition to determining the mass make up on local scales (comparable to the Baryon Acoustic Oscillation, BAO, scale), the same observations can determine the growth index, γ where f ∝ Ω γ M with f is the linear growth rate and Ω M is the ratio of the matter density to critical density.…”

Section: A Public Transient Utilitymentioning

confidence: 99%

Towards An Integrated Optical Transient Utility

Kulkarni¹

2020

Preprint

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The ongoing optical time-domain astronomy surveys are routinely reporting fifty transient candidates per night. Here, I investigate the demographics of astronomical transients and supernova classifications reported to the Transient Name Server in the year 2019. I find that only a tenth of the transients were spectrally classified. This severe "bottleneck" problem should concern astronomers and also funding agencies. The bottleneck will get worse by a factor of 20 (or more) once LSST comes on line. We need to fundamentally rethink the purpose of surveys for transients. Here, after undertaking a detailed investigation of this issue I offer some solutions. Going forward, astronomers will employ two different methodologies: (1) multi-band photometric method which is well suited to the study of very large, many tens of thousands, samples of faint transients; (2) spectral classifications of thousands of bright transients found in shallow and nightly cadenced wide-field photometry surveys and transients associated with galaxies in the local Universe. The latter program, in addition to unearthing new types of transients and offering astronomers opportunities to undertake extensive follow up of interesting transients, is needed to set the stage for the former. Specifically, I suggest a globally coordinated effort to spectrally classify a complete sample of bright supernovae ( 19.5 mag) and transients within the local Universe (< 200 Mpc). The proposed program is within reach -thanks to the on-going widefield surveys, the development of novel spectrographs tuned for classification, great improvements in throughput of spectrographs and the increasing availability of robotic telescopes.

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Peculiar velocity cosmology with type Ia supernovae

Cited by 10 publications

References 24 publications

The large-scale environment of thermonuclear and core-collapse supernovae

The large-scale environment of thermonuclear and core-collapse supernovae

The Zwicky Transient Facility Type Ia supernova survey: first data release and results

Towards An Integrated Optical Transient Utility

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