J/ApJ/755/125 Sample of SNe Ia with z<0.25 from SDSS (Galbany+, 2012)
Type Ia supernova properties as a function of the distance to the host galaxy
in the SDSS-II SN survey.
Galbany L., Miquel R., Ostman L., Brown P.J., Cinabro D., D'Andrea C.B.,
Frieman J., Jha S.W., Marriner J., Nichol R.C., Nordin J., Olmstead M.D.,
Sako M., Schneider D.P., Smith M., Sollerman J., Pan K., Snedden S.,
Bizyaev D., Brewington H., Malanushenko E., Malanushenko V., Oravetz D.,
Simmons A., Shelden A.
<Astrophys. J., 755, 125 (2012)>
=2012ApJ...755..125G 2012ApJ...755..125G
ADC_Keywords: Supernovae
Keywords: galaxies: general; galaxies: photometry; supernovae: general
Abstract:
We use Type Ia supernovae (SNe Ia) discovered by the Sloan Digital Sky
Survey-II SN Survey to search for dependencies between SN Ia
properties and the projected distance to the host-galaxy center, using
the distance as a proxy for local galaxy properties (local star
formation rate, local metallicity, etc.). The sample consists of
almost 200 spectroscopically or photometrically confirmed SNe Ia at
redshifts below 0.25. The sample is split into two groups depending on
the morphology of the host galaxy. We fit light curves using both
MLCS2K2 and SALT2, and determine color (AV, c) and light-curve shape
(Δ, x1) parameters for each SN Ia, as well as its residual in
the Hubble diagram. We then correlate these parameters with both the
physical and the normalized distances to the center of the host galaxy
and look for trends in the mean values and scatters of these
parameters with increasing distance. The most significant (at the
4σ level) finding is that the average fitted AV from MLCS2K2
and c from SALT2 decrease with the projected distance for SNe Ia in
spiral galaxies. We also find indications that supernovae (SNe) in
elliptical galaxies tend to have narrower light curves if they explode
at larger distances, although this may be due to selection effects in
our sample. We do not find strong correlations between the residuals
of the distance moduli with respect to the Hubble flow and the
galactocentric distances, which indicates a limited correlation
between SN magnitudes after standardization and local host
metallicity.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 14 216 Final SN sample after all cuts have been applied
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See also:
B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)
J/A+A/544/A81 : Supernovae and their hosts in the SDSS DR8 (Hakobyan+, 2012)
J/AJ/144/17 : SDSS and CSP ugri phot. of 9 type Ia supernova (Mosher+, 2012)
J/ApJ/740/92 : SN.Ia host galaxies properties (Gupta+, 2011)
J/ApJ/738/162 : SN Ia candidates from the SDSS-II SN Survey (Sako+, 2011)
J/A+A/526/A28 : SDSS-II supernovae NTT and NOT spectroscopy (Oestman+, 2011)
J/ApJ/722/566 : Host galaxies of SNe Ia in SDSS-II SN survey (Lampeitl+, 2010)
J/ApJ/713/1026 : SN Ia rate at redshift ≲0.3 from SDSS-II (Dilday+, 2010)
J/MNRAS/406/782 : Type Ia supernovae luminosities (Sullivan+, 2010)
J/AJ/139/519 : Carnegie supernova project. SNe Ia (Contreras+, 2010)
J/ApJ/700/331 : Light curves of type Ia supernovae (CfA3) (Hicken+, 2009)
J/ApJS/185/32 : First-year SDSS-II SN results (Kessler+, 2009)
J/AJ/136/2306 : SDSS-II Supernova survey, 2005 (Holtzman+, 2008)
J/AJ/135/1766 : Sloan Digital Sky Survey-II supernova survey (Zheng+, 2008)
J/AJ/135/348 : SDSS-II SNe survey: search and follow-up (Sako+, 2008)
J/MNRAS/389/1871 : Type Ia supernovae candidates from SDSS (Horesh+, 2008)
J/ApJ/659/122 : Improved distances to type Ia supernovae (Jha+, 2007)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- SN Supernova name (YYYYaa or NNNNN) (1)
8- 14 A7 --- Set Sample: "MLCS2K2", "SALT2" or "both" (2)
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Note (1): IAU name when exists ( in Simbad), otherwise internal
SDSS name from SDSS-II SN Survey (Frieman et al. 2008AJ....135..338F 2008AJ....135..338F;
<SDSS-II SN NNNNN> in Simbad).
Note (2): Indicates if SN is present only in the MLCS2k2 (Jha et al. 2007,
Cat. J/ApJ/659/122) or SALT2 (Guy et al. 2007A&A...466...11G 2007A&A...466...11G) samples,
or in both.
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 13-Mar-2014