J/MNRAS/435/1680 SN Ia host galaxy properties (Johansson+, 2013)
SN Ia host galaxy properties from Sloan Digital Sky Survey-II spectroscopy.
Johansson J., Thomas D., Pforr J., Maraston C., Nichol R.C., Smith M.,
Lampeitl H., Beifiori A., Gupta R.R., Schneider D.P.
<Mon. Not. R. Astron. Soc., 435, 1680-1700 (2013)>
=2013MNRAS.435.1680J 2013MNRAS.435.1680J
ADC_Keywords: Supernovae ; Redshifts
Keywords: supernovae: general - galaxies: abundances - cosmological parameters -
cosmology: observations- distance scale -
large-scale structure of Universe
Abstract:
We study the stellar populations of Type Ia supernova (SN Ia) host
galaxies using Sloan Digital Sky Survey (SDSS)-II spectroscopy. The
main focus is on the relationships of SN Ia properties with stellar
velocity dispersion and the stellar population parameters age,
metallicity and element abundance ratios. We concentrate on a
sub-sample of 84 SNe Ia from the SDSS-II Supernova Survey and find
that SALT2 stretch factor values show the strongest dependence on
stellar population age. Hence, more luminous SNe Ia appear in younger
stellar progenitor systems. No statistically significant trends in the
Hubble residual with any of the stellar population parameters studied
are found. Moreover, the method of photometric stellar mass derivation
affects the Hubble residual-mass relationship. For an extended sample
(247 objects), including SNe Ia with SDSS host galaxy photometry only,
the Hubble residual-mass relationship behaves as a sloped step
function. In the high-mass regime, probed by our host spectroscopy
sample, this relationship is flat. Below a stellar mass of
∼2x1010M☉, i.e. close to the evolutionary transition mass of
low-redshift galaxies, the trend changes dramatically such that lower
mass galaxies possess lower luminosity SNe Ia after light-curve
corrections. The sloped step function of the Hubble residual-mass
relationship should be accounted for when using stellar mass as a
further parameter for minimizing the Hubble residuals.
Description:
The sample used in this study is drawn from the SDSS-II Supernova
Survey (Frieman et al., 2008AJ....135..338F 2008AJ....135..338F).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
appen.dat 35 277 Properties of the SNIa host galaxies studied
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See also:
J/AJ/135/348 : SDSS-II SNe survey: search and follow-up (Sako+, 2008)
J/AJ/135/1766 : Sloan Digital Sky Survey-II supernova survey (Zheng+, 2008)
J/AJ/136/2306 : SDSS-II Supernova survey, 2005 (Holtzman+, 2008)
J/ApJS/185/32 : First-year SDSS-II SN results (Kessler+, 2009)
J/ApJ/708/661 : SDSS-II SN Survey: SNe II-P standardization (D'Andrea+, 2010)
Byte-by-byte Description of file: appen.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- SN [1/22075] SDSS-II Supernova Survey number,
<SDSS-II SN NNNNN> in Simbad
7- 8 A2 --- n_SN [Sp Ph] Supernova Ia class from Spectroscopic
or Photometric technique
10- 17 F8.4 deg RAdeg Right ascension (J2000)
19- 25 F7.4 deg DEdeg Declination (J2000)
27- 33 F7.4 --- z [0/0.51] Redshift
35 A1 --- Sample [fm] Sample: f (final host spectroscopy, see
Section 2.3) or master (see Section 3.4.2)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 26-Sep-2014