2011ApJ...743..172D

Query : 2011ApJ...743..172D

2011ApJ...743..172D - Astrophys. J., 743, 172 (2011/December-3)

Spectroscopic properties of star-forming host galaxies and type Ia supernova Hubble residuals in a nearly unbiased sample.

D'ANDREA C.B., GUPTA R.R., SAKO M., MORRIS M., NICHOL R.C., BROWN P.J., CAMPBELL H., OLMSTEAD M.D., FRIEMAN J.A., GARNAVICH P., JHA S.W., KESSLER R., LAMPEITL H., MARRINER J., SCHNEIDER D.P. and SMITH M.

Abstract (from CDS):

We examine the correlation between supernova (SN) host-galaxy properties and their residuals in the Hubble diagram. We use SNe discovered during the Sloan Digital Sky Survey-II Supernova Survey, and focus on objects at a redshift of z < 0.15, where the selection effects of the survey are known to yield a complete Type Ia supernova (SN Ia) sample. To minimize the bias in our analysis with respect to measured host-galaxy properties, spectra were obtained for nearly all hosts, spanning a range in magnitude of -23 < Mr< -17. In contrast to previous works that use photometric estimates of host mass as a proxy for global metallicity, we analyze host-galaxy spectra to obtain gas-phase metallicities and star formation rates (SFRs) from host galaxies with active star formation. From a final sample of ∼40 emission-line galaxies, we find that light-curve-corrected SNe Ia are ∼0.1 mag brighter in high-metallicity hosts than in low-metallicity hosts. We also find a significant (>3σ) correlation between the Hubble Residuals of SNe Ia and the specific SFR of the host galaxy. We comment on the importance of SN/host-galaxy correlations as a source of systematic bias in future deep SN surveys.

Abstract Copyright: ∼

Journal keyword(s): cosmology: observations - galaxies: abundances - supernovae: general - surveys

Simbad objects: 47

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Number of rows : 47
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SN 2006jh SN* 00 06 45.742 -00 02 12.29           SNIa 22 1
2 SN 2007ju SN* 00 11 50.465 -00 20 21.67           SNIa 23 1
3 SN 2005hx SN* 00 13 00.13 +00 14 53.7   20.6       SNIa 33 1
4 SN 2005kp SN* 00 30 53.153 -00 43 07.77   21.8       SNIa 34 1
5 SN 2007ma SN* 00 44 53.747 -00 59 49.39           SNIa 26 1
6 SN 2007lg SN* 00 46 03.944 -00 00 37.37           SNIa 19 1
7 SN 2007lc SN* 00 49 09.103 +00 35 49.05           SNIa 26 1
8 SN 2006nc SN* 00 55 22.512 -00 23 21.16           SNIa 31 1
9 SN 2005ho SN* 00 59 24.104 +00 00 09.34           SNIa 33 1
10 SN 2006kd SN* 01 07 49.944 +00 49 42.89           SNIa 29 1
11 SN 2006hx SN* 01 13 57.31 +00 22 18.0           SNIa 50 1
12 SN 2005gb SN* 01 16 12.600 +00 47 30.90   19.4       SNIa 42 1
13 SN 2005ir SN* 01 16 43.752 +00 47 40.36           SNIa 67 1
14 SN 2006fw SN* 01 47 10.340 -00 08 49.07           SNIa 42 1
15 SN 2007mn SN* 02 05 03.96 +00 10 28.4           SNIa 20 1
16 SN 2007hx SN* 02 06 27.288 -00 53 57.57           SNIa 42 1
17 SN 2007ou SN* 02 23 42.618 -00 49 35.68           SNIa 10 1
18 SN 2007jt SN* 02 28 32.760 -01 02 34.12           SNIa 30 1
19 SN 2007jd SN* 02 59 53.688 +01 09 36.83           SNIa 31 1
20 SN 2005ij SN* 03 04 21.264 -01 03 46.87   20.6       SNIa 37 1
21 SN 2005fv SN* 03 05 22.42 +00 51 30.1   21.1       SNIa 35 1
22 SN 2005ez SN* 03 07 10.967 +01 07 10.39           SNIa 33 1
23 SN 2007mh SN* 03 14 32.088 +00 16 08.27           SNIa 23 1
24 SN 2005hr SN* 03 18 33.816 +00 07 24.03   22.7       SNIa 28 1
25 SN 2007jg SN* 03 29 50.81 +00 03 24.6           SNIa 56 1
26 SN 2005if SN* 03 30 12.888 -00 58 28.17   19.1       SNIa 39 1
27 SN 2005fw SN* 03 30 48.960 -01 14 15.40   20.9       SNIa 29 1
28 SN 2006jq SN* 03 37 06.456 +00 00 33.38           SNIa 22 1
29 SN 2005gp SN* 03 41 59.352 -00 46 58.51   22.5       SNIa 33 1
30 SN 2006kb SN* 20 19 10.21 -01 03 52.2           SNIa 18 1
31 SN 2006iz SN* 21 16 17.20 +00 33 34.2           SNIa 12 1
32 SN 2006fc SN* 21 34 46.800 +01 10 31.51           SNIa 28 1
33 SN 2005ld SN* 21 40 00.480 -00 00 28.96   22.1       SNIa 29 1
34 SDSS-II SN 19048 SN* 21 44 29.892 +00 35 43.98           ~ 5 0
35 SN 2007lt SN* 21 53 47.280 +00 00 54.10           SNIa 23 1
36 SN 2005hn SN* 21 57 04.080 -00 13 24.45   23.0       SNIa 31 1
37 SN 2006fm SN* 22 10 10.320 +00 30 14.12           SNIa 28 1
38 SN 2005ff SN* 22 30 41.040 -00 46 34.47   21.0       SNIa 37 1
39 SN 2007lo SN* 22 35 56.160 +00 36 32.79           SNIa 23 1
40 SN 2006la SN* 22 42 48.240 -00 54 06.33           SNIa 20 1
41 SN 2006nd SN* 22 44 58.812 -01 00 23.05           SNIa 29 1
42 LP 877-23 PM* 22 52 41.0353986762 -20 35 32.994432457   13.02 11.90     ~ 119 0
43 SDSS-II SN 6213 SN* 22 56 25.3 -00 27 00           ~ 4 0
44 SN 2007pd SN* 23 11 54.240 -00 34 44.61           SNIa 23 1
45 SN 2006hl SN* 23 22 46.080 +00 31 56.34           SNIa 28 1
46 SN 2006fy SN* 23 26 40.080 -00 50 26.16           SNIa 33 1
47 SDSS-II SN 15362 SN* 23 38 55.20 +00 45 38.1           ~ 3 0

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