J/ApJ/867/108 Stellar masses and rest-frame u-g colors of SNIa (Jones+, 2018)
Should Type Ia supernova distances be corrected for their local environments?
Jones D.O., Riess A.G., Scolnic D.M., Pan Y.-C., Johnson E., Coulter D.A.,
Dettman K.G., Foley M.M., Foley R.J., Huber M.E., Jha S.W., Kilpatrick C.D.,
Kirshner R.P., Rest A., Schultz A.S.B., Siebert M.R.
<Astrophys. J., 867, 108 (2018)>
=2018ApJ...867..108J 2018ApJ...867..108J
ADC_Keywords: Supernovae; Stars, masses; Colors; Reddening; Optical
Keywords: cosmology: observations ; supernovae: general
Abstract:
Recent analyses suggest that distance residuals measured from Type Ia
supernovae (SNe Ia) are correlated with local host galaxy properties
within a few kiloparsecs of the SN explosion. However, the
well-established correlation with global host galaxy properties is
nearly as significant, with a shift of 0.06mag across a low to high
mass boundary (the mass step). Here, with 273 SNe Ia at z<0.1, we
investigate whether the stellar masses and rest-frame u-g colors of
regions within 1.5kpc of the SN Ia explosion site are significantly
better correlated with SN distance measurements than global properties
or properties measured at random locations in SN hosts. At ≳2σ
significance, local properties tend to correlate with distance
residuals better than properties at random locations, though despite
using the largest low-z sample to date, we cannot definitively prove
that a local correlation is more significant than a random
correlation. Our data hint that SNe observed by surveys that do not
target a pre-selected set of galaxies may have a larger local mass
step than SNe from surveys that do, an increase of 0.071±0.036mag
(2.0σ). We find a 3σ local mass step after global mass
correction, evidence that SNe Ia should be corrected for their local
mass, but we note that this effect is insignificant in the targeted
low-z sample. Only the local mass step remains significant at
>2σ after global mass correction, and we conservatively estimate
a systematic shift in H0 measurements of -0.14km/s/Mpc with an
additional uncertainty of 0.14km/s/Mpc, ∼10% of the present
uncertainty.
Description:
For this analysis, we combine 216 z<0.1 SNe from the Pantheon
compilation (Scolnic+ 2018ApJ...859..101S 2018ApJ...859..101S) with 178 SNe Ia from the
Foundation first data release (DR1; Foley+ 2018MNRAS.475..193F 2018MNRAS.475..193F).
We measure host galaxy properties with photometry from the PS1 first
data release (Chambers+ 2016, II/349) and the Sloan Digital Sky Survey
Data Release 14 (SDSS DR14; Abolfathi+ 2018ApJS..235...42A 2018ApJS..235...42A).
After all cuts, grizy images for measuring the local mass step are
available for 273 SNe Ia. Of these SNe, 195 lie in the SDSS footprint
and therefore have u measurements for measuring the rest-frame u-g color.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
localsn.dat 343 273 Measurements of Hubble residuals and host galaxy
properties for 273 Type Ia supernovae at z<0.1
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See also:
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016)
II/358 : SkyMapper Southern Sky Survey. DR1.1 (Wolf+, 2018)
J/AJ/131/527 : UBVRI light curves of 44 type Ia supernovae (Jha+, 2006)
J/ApJ/700/331 : Light curves of type Ia supernovae (CfA3) (Hicken+, 2009)
J/ApJ/700/1097 : Light curve parameters of SN Ia (Hicken+, 2009)
J/ApJ/690/1236 : COSMOS photometric redshift catalog (Ilbert+, 2009)
J/ApJS/185/32 : First-year SDSS-II SN results (Kessler+, 2009)
J/AJ/139/519 : Carnegie supernova project. SNe Ia (Contreras+, 2010)
J/AJ/139/120 : Low-redshift Type-Ia supernovae (Folatelli+, 2010)
J/A+A/523/A7 : Light curves of type Ia supernovae in SNLS (Guy+, 2010)
J/ApJ/722/566 : Host galaxies of SNeIa in SDSS-II SN survey (Lampeitl+, 2010)
J/MNRAS/406/782 : Type Ia supernovae luminosities (Sullivan+, 2010)
J/AJ/142/156 : The CSP (DR2): photometry of SNe Ia (Stritzinger+, 2011)
J/ApJS/200/12 : CfA4: light curves for 94 type Ia SNe (Hicken+, 2012)
J/A+A/568/A22 : Joint analysis of the SDSS-II & SNLS SNe Ia (Betoule+, 2014)
J/MNRAS/438/1391 : Host galaxies of Type Ia SN from PTF (Pan+, 2014)
J/ApJ/795/44 : PS1 SNe Ia (0.02<z<0.7) griz light curves (Rest+, 2014)
J/AJ/148/13 : Redshifts of 65 CANDELS supernovae (Rodney+, 2014)
J/MNRAS/450/905 : New SNe in SDSS DR9 (Graur+, 2015)
J/ApJ/812/31 : Local Star Formation effects on type Ia SNe (Jones+, 2015)
J/ApJ/826/56 : HST/WFC3 obs. of Cepheids in SN Ia host gal. (Riess+, 2016)
J/ApJ/848/56 : Relationships between SNe Ia & host galaxies (Uddin+, 2017)
J/ApJ/857/51 : Measuring dark energy data with PS1 SNe. II. (Jones+, 2018)
J/ApJ/854/24 : Environmental dependence of SN Ia luminosities (Kim+, 2018)
J/A+A/615/A68 : Type Ia supernova luminosities (Roman+, 2018)
Byte-by-byte Description of file: localsn.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- SN Supernova Identifier
13- 14 I2 h RAh Hour of Right Ascension, Supernova (J2000)
16- 17 I2 min RAm Minute of Right Ascension (J2000)
19- 24 F6.3 s RAs Second of Right Ascension (J2000)
26- 26 A1 --- DE- Sign of the Declination, Supernova (J2000)
27- 28 I2 deg DEd Degree of Declination, Supernova (J2000)
30- 31 I2 arcmin DEm Arcminute of Declination (J2000)
33- 37 F5.2 arcsec DEs Arcsecond of Declination (J2000)
39- 45 F7.5 --- z [0.01/0.1] Redshift
47- 48 I2 h RAHh Hour of Right Ascension, Host Galaxy
(J2000)
50- 51 I2 min RAHm Minute of Right Ascension (J2000)
53- 58 F6.3 s RAHs Second of Right Ascension (J2000)
60- 60 A1 --- DEH- Sign of the Declination, Host Galaxy
(J2000)
61- 62 I2 deg DEHd Degree of Declination, Host Galaxy (J2000)
64- 65 I2 arcmin DEHm Arcminute of Declination (J2000)
67- 71 F5.2 arcsec DEHs Arcsecond of Declination (J2000)
73- 77 F5.3 --- Rpar [0.07/5] Size- and orientation-weighted SN
separation parameter (1)
79- 82 F4.2 mag E(B-V) [0/0.2] Average galaxy reddening
84- 90 F7.3 mag (u-g)loc [0.1/2.2]?=-99 Local (u-g) color index (2)
92- 98 F7.3 mag b_(u-g)loc ?=-99 Lower bound on local (u-g) color (2)
100-106 F7.3 mag B_(u-g)loc ?=-99 Upper bound on local (u-g) color (2)
108-114 F7.3 mag (u-g) [0.2/2.2]?=-99 Global (u-g) color
index (2)
116-122 F7.3 mag b_(u-g) ?=-99 Lower bound on (u-g) (2)
124-130 F7.3 mag B_(u-g) ?=-99 Upper bound on (u-g) (2)
132-137 F6.3 [Msun] Massloc [6.7/10.8] Local mass within a 3kpc radius
139-144 F6.3 [Msun] b_Massloc Lower bound on local mass density
146-151 F6.3 [Msun] B_Massloc Upper bound on local mass density
153-158 F6.3 [Msun] Mass [6.7/12] Global mass
160-165 F6.3 [Msun] b_Mass Lower bound on global mass density
167-172 F6.3 [Msun] B_Mass Upper bound on global mass density
174-180 F7.3 [kpc-2/yr] SFRloc [-42.5/-7.5]?=-99 local star formation
rate, log(yr-1.kpc-2)
182-188 F7.3 [kpc-2/yr] b_SFRloc ?=-99 Lower bound SFRloc
190-196 F7.3 [kpc-2/yr] B_SFRloc ?=-99 Upper bound SFRloc
198-204 F7.3 [kpc-2/yr] SFR [-42.5/-7.7]?=-99 Global star formation
rate, log(yr-1.kpc-2)
206-212 F7.3 [kpc-2/yr] b_SFR ?=-99 Lower bound on SFR
214-220 F7.3 [kpc-2/yr] B_SFR ?=-99 Upper bound on SFR
222-225 F4.1 deg Inc [12/70] Inclination
227-232 F6.3 mag Hres [-0.5/0.4] Hubble residual, µ
234-238 F5.3 mag e_Hres [0.04/0.3] Uncertainty in hubble-resid
240-245 F6.3 mag Hrescor [-0.2/0.2] Bias correction, hubble-resid
247-252 F6.3 --- c [-0.2/0.3] Tripp estimator parameter, c,
light curve color parameter
254-258 F5.3 --- e_c [0.009/0.1] Uncertainty in c
260-265 F6.3 --- ccor [-0.11/0.04] Bias correction, c parameter
267-272 F6.3 --- x1 [-2.7/2.3] Tripp estimator, x1, light
curve shape parameter
274-278 F5.3 --- e_x1 [0.02/0.9] Uncertainty in x1
280-285 F6.3 --- x1cor [-0.4/1] Bias correction, x1 parameter
287-292 F6.3 mag mb [14/20] Tripp estimator, mb, log of
the light curve amplitude
294-298 F5.3 mag e_mb [0.02/0.2] Uncertainty in mb
300-305 F6.3 mag mbcor [-0.2/0.03] Bias correction, mb parameter
307-314 F8.5 arcsec r-A [0.2/21] SExtractor galaxy ellipse
parameter, A
316-323 F8.5 arcsec r-B [0.1/11.2] SExtractor galaxy ellipse
parameter, B
325-330 F6.2 deg theta [-90/90] SExtractor galaxy ellipse
parameter, θ
332-343 A12 --- Survey Was the survey targeted or untargeted
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Note (1): The galaxy size- and orientation-weighted SN separation parameter, R
(Sullivan+ 2006ApJ...648..868S 2006ApJ...648..868S) defined in Equation (2):
R2=Cxxxr2+Cyyyr2+Cxyxryr_
Cxx=cos2(θ)/r2A+sin2(θ)/r2B
cxy=2cos(θ)sin(θ)(1/r2A+1/r2B)
Cyy=sin2(θ)/r2A+cos2(θ)/r2B
where xr=xSN-xgal and yr=ySN-ygal. rA, rB, and θ are
galaxy ellipse parameters measured by SExtractor. Each R parameter
corresponds to an elliptical radius about the host center. We consider the
host ambiguous if the minimum R is greater than 5.
See section 2.2 for further explanations.
Note (2): The (u-g) color is given as null when u photometry was not available.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 14-Oct-2019