Testing the consistency of dust laws in SN Ia host galaxies: A <scp>BayeSN</scp> Examination of Foundation DR1

Thorp, Stephen; Mandel, Kaisey S.; Jones, D. O.; Ward, Sam M.; Narayan, Gautham

doi:10.1093/mnras/stab2849

Cited by 35 publications

(49 citation statements)

References 121 publications

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“…We note that this is comparable to the light-curve scatter from other low-z samples in the literature, when analysed with the SALT2 model (see, e.g. Thorp et al 2021 ) as well as low-z sample of SNe Ia used in cosmological studies (e.g. Scolnic et al 2018 ).…”

Section: Hubble Residualssupporting

confidence: 81%

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

Dhawan

Goobar

Smith

et al. 2021

Monthly Notices of the Royal Astronomical Society

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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 $\bar{z} =$ 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 DL < 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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Section: Hubble Residualssupporting

confidence: 81%

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

Dhawan

Goobar

Smith

et al. 2021

Monthly Notices of the Royal Astronomical Society

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“…Smith et al ( 2020 ) found a difference of up to 0.04 mag in the average intrinsic magnitude of the two groups, and application MNRAS 514, 139-163 (2022) of the Tripp relation to the two groups separately may further reduce the residual dispersion in SNIa absolute magnitudes. (See also Thorp et al ( 2021 ) for a similar result obtained using a Bayesian hierarchical approach.) Ho we ver, have recently cast doubt on the robustness of this mass-step correction, which they ascribed instead to incorrect dust modelling.…”

Section: Bayesian Hierarchical Modelsupporting

confidence: 54%

New constraints on anisotropic expansion from supernovae Type Ia

Rahman

Trotta

Boruah

et al. 2022

Monthly Notices of the Royal Astronomical Society

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We re-examine the contentious question of constraints on anisotropic expansion from Type Ia supernovae (SNIa) in the light of a novel determination of peculiar velocities, which are crucial to test isotropy with SNe out to distances $\lesssim 200/h$ Mpc. We re-analyse the Joint Light-Curve Analysis (JLA) Supernovae (SNe) data, improving on previous treatments of peculiar velocity corrections and their uncertainties (both statistical and systematic) by adopting state-of-the-art flow models constrained independently via the 2M++ galaxy redshift compilation. We also introduce a novel procedure to account for colour-based selection effects, and adjust the redshift of low-z SNe self-consistently in the light of our improved peculiar velocity model. We adopt the Bayesian hierarchical model BAHAMAS to constrain a dipole in the distance modulus in the context of the ΛCDM model and the deceleration parameter in a phenomenological Cosmographic expansion. We do not find any evidence for anisotropic expansion, and place a tight upper bound on the amplitude of a dipole, |Dμ| < 5.93 × 10−4 (95 per cent credible interval) in a ΛCDM setting, and $|D_{q_0}| < 6.29 \times 10^{-2}$ in the Cosmographic expansion approach. Using Bayesian model comparison, we obtain posterior odds in excess of 900:1 (640:1) against a constant-in-redshift dipole for ΛCDM (the Cosmographic expansion). In the isotropic case, an accelerating universe is favoured with odds of ∼1100 : 1 with respect to a decelerating one.

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“…However, there are now two well-vetted light-curve models extending to the NIR: the SNooPy model (Burns et al 2011(Burns et al , 2014 and the BayeSN model (Thorp et al 2021;Mandel et al 2022).…”

Section: Nir Light-curve Modelsmentioning

confidence: 99%

“…Brout et al 2022). In the optical bands, where most SN Ia data have been obtained, substantial deviations from the behavior of a standard candle are reduced by correcting for the observed relations between light-curve shape and luminosity (Pskovskii 1977;Phillips 1993;Hamuy et al 1996;Riess et al 1996;Guy et al 2007;Jha et al 2007;Conley et al 2008;Mandel et al 2011;Burns et al 2014), reddening by dust (Riess et al 1996;Phillips et al 1999;Burns et al 2014;Thorp et al 2021;Mandel et al 2022), and the intrinsically redder color of less luminous SNe Ia (Tripp 1998;Mandel et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Cosmological Results from the RAISIN Survey: Using Type Ia Supernovae in the Near Infrared as a Novel Path to Measure the Dark Energy Equation of State

Jones

Mandel²,

Kirshner

et al. 2022

ApJ

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Type Ia supernovae (SNe Ia) are more precise standardizable candles when measured in the near-infrared (NIR) than in the optical. With this motivation, from 2012 to 2017 we embarked on the RAISIN program with the Hubble Space Telescope (HST) to obtain rest-frame NIR light curves for a cosmologically distant sample of 37 SNe Ia (0.2 ≲ z ≲ 0.6) discovered by Pan-STARRS and the Dark Energy Survey. By comparing higher-z HST data with 42 SNe Ia at z < 0.1 observed in the NIR by the Carnegie Supernova Project, we construct a Hubble diagram from NIR observations (with only time of maximum light and some selection cuts from optical photometry) to pursue a unique avenue to constrain the dark energy equation-of-state parameter, w. We analyze the dependence of the full set of Hubble residuals on the SN Ia host galaxy mass and find Hubble residual steps of size ∼0.06-0.1 mag with 1.5σ−2.5σ significance depending on the method and step location used. Combining our NIR sample with cosmic microwave background constraints, we find 1 + w = −0.17 ± 0.12 (statistical + systematic errors). The largest systematic errors are the redshift-dependent SN selection biases and the properties of the NIR mass step. We also use these data to measure H 0 = 75.9 ± 2.2 km s−1 Mpc−1 from stars with geometric distance calibration in the hosts of eight SNe Ia observed in the NIR versus H 0 = 71.2 ± 3.8 km s−1 Mpc−1 using an inverse distance ladder approach tied to Planck. Using optical data, we find 1 + w = −0.10 ± 0.09, and with optical and NIR data combined, we find 1 + w = −0.06 ± 0.07; these shifts of up to ∼0.11 in w could point to inconsistency in the optical versus NIR SN models. There will be many opportunities to improve this NIR measurement and better understand systematic uncertainties through larger low-z samples, new light-curve models, calibration improvements, and eventually by building high-z samples from the Roman Space Telescope.

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Testing the consistency of dust laws in SN Ia host galaxies: A BayeSN Examination of Foundation DR1

Cited by 35 publications

References 121 publications

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

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

New constraints on anisotropic expansion from supernovae Type Ia

Cosmological Results from the RAISIN Survey: Using Type Ia Supernovae in the Near Infrared as a Novel Path to Measure the Dark Energy Equation of State

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