J/ApJ/896/L4 Hubble-Lemaitre residuals and ages for Pantheon SNe (Rose+, 2020)
Evidence for cosmic acceleration is robust to observed correlations between
Type Ia supernova luminosity and stellar age.
Rose B.M., Rubin D., Cikota A., Deustua S.E., Dixon S., Fruchter A.,
Jones D.O., Riess A.G., Scolnic D.M.
<Astrophys. J., 896, L4 (2020)>
=2020ApJ...896L...4R 2020ApJ...896L...4R (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae; Stars, ages
Keywords: Cosmological constant; Dark energy; Type Ia supernovae
Observational cosmology; Distance indicators
Abstract:
Type Ia supernovae (SNe Ia) are powerful standardizable candles for
constraining cosmological models and provided the first evidence of
the accelerated expansion of the universe. Their precision derives
from empirical correlations, now measured from >1000 SNe Ia, between
their luminosities, light-curve shapes, colors, and most recently with
the stellar mass of their host galaxy. As mass correlates with other
galaxy properties, alternative parameters have been investigated to
improve SN Ia standardization though none have been shown to
significantly alter the determination of cosmological parameters. We
re-examine a recent claim, based on 34 SN Ia in nearby passive host
galaxies, of a 0.05mag/Gyr dependence of standardized SN Ia luminosity
on host age, which, if extrapolated to higher redshifts, would be a
bias up to 0.25mag, challenging the inference of dark energy. We
reanalyze this sample of hosts using both the original method and a
Bayesian hierarchical model and find after a fuller accounting of the
uncertainties the significance of a dependence on age to be ≤2σ
and ∼1σ after the removal of a single poorly sampled SN Ia. To
test the claim that a trend seen in old stellar populations can be
applied to younger ages, we extend our analysis to a larger sample
that includes young hosts. We find the residual dependence of host age
(after all standardization typically employed for cosmological
measurements) to be consistent with zero for 254 SNe Ia from the
Pantheon sample, ruling out the large but low significance trend seen
in passive hosts.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 32 254 Hubble-Lemaitre residuals and ages for
254 low redshift Pantheon SN I
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See also:
B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)
J/ApJS/94/687 : Old stellar populations. V. (Worthey+, 1994)
J/AJ/112/2408 : Light Curves of 29 SNe (Hamuy+ 1996)
J/ApJ/659/122 : Improved distances to type Ia supernovae (Jha+, 2007)
J/AJ/135/348 : SDSS-II SNe survey: search and follow-up (Sako+, 2008)
J/ApJ/700/1097 : Light curve parameters of SN Ia (Hicken+, 2009)
J/A+A/523/A7 : Light curves of type Ia supernovae in SNLS (Guy+, 2010)
J/ApJ/722/566 : Host galaxies of SNIa in SDSS-II SN survey (Lampeitl+, 2010)
J/MNRAS/406/782 : Type Ia supernovae luminosities (Sullivan+, 2010)
J/ApJ/740/92 : SN.Ia host galaxies properties (Gupta+, 2011)
J/ApJ/746/85 : THe HST Cluster Supernova Survey. V. (Suzuki+, 2012)
J/ApJ/763/88 : SDSS-II supernovae Ia cosmological analysis (Campbell+, 2013)
J/A+A/568/A22 : Joint analysis of the SDSS-II & SNLS SNe Ia (Betoule+, 2014)
J/ApJ/795/44 : PS1 SNe Ia (0.02<z<0.7) griz light curves (Rest+, 2014)
J/ApJ/812/31 : Local Star Formation effects on type Ia SNe (Jones+, 2015)
J/ApJ/848/56 : Relationships between SNIa & the host galaxies (Uddin+, 2017)
J/ApJ/854/24 : Environmental dependence of SN Ia luminosities (Kim+, 2018)
J/ApJ/859/101 : The supernovae Ia Pantheon sample (Scolnic+, 2018)
J/ApJ/867/108 : Stellar masses & rest-frame u-g colors of SNIa (Jones+, 2018)
J/ApJ/874/32 : Environment and hosts of Type Ia supernovae (Rose+, 2019)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- SNIa SNIa name
13- 19 F7.4 mag Hres [-0.36/5.51] Hubble-Lemaitre residuals (1)
21- 24 F4.2 mag e_Hres [0.07/0.22] Uncertainty in Hres
26- 32 F7.4 Gyr Age [0.028/20] Age (2)
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Note (1): Hubble-Lemaitre residuals from Jones+ (2018, J/ApJ/867/108).
Note (2): Ages (light-weighted) are estimated using ZPEG
(Le Borgne & Rocca-Volmerange 2002A&A...386..446L 2002A&A...386..446L). We used a fixed
15% uncertainty in this analysis.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 02-Nov-2021