2011ApJ...734...42N

Query : 2011ApJ...734...42N

2011ApJ...734...42N - Astrophys. J., 734, 42 (2011/June-2)

Evidence for a correlation between the Si II λ4000 width and type Ia supernova color.

NORDIN J., OSTMAN L., GOOBAR A., BALLAND C., LAMPEITL H., NICHOL R.C., SAKO M., SCHNEIDER D.P., SMITH M., SOLLERMAN J. and WHEELER J.C.

Abstract (from CDS):

We study the pseudo-equivalent width of the Si II λ4000 feature of Type Ia supernovae (SNe Ia) in the redshift range 0.0024 ≤ z ≤ 0.634. We find that this spectral indicator correlates with the light curve color excess (SALT2c) as well as previously defined spectroscopic subclasses (Branch types) and the evolution of the Si II λ6150 velocity, i.e., the so-called velocity gradient. Based on our study of 55 objects from different surveys, we find indications that the Si II λ4000 spectral indicator could provide important information to improve cosmological distance measurements with SNe Ia.

Abstract Copyright: ∼

Journal keyword(s): cosmology: observations - distance scale - dust, extinction - supernovae: general

Simbad objects: 57

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Number of rows : 57
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 2007qh SN* 00 39 30.86 +01 01 27.6           SNIa 17 1
2 SN 2007lh SN* 01 08 52.02 +01 11 52.4           SNIa 17 1
3 SN 2007ka SN* 01 21 22.70 -00 00 53.3           SNIa 19 1
4 SN 1999ej SN* 01 22 57.38 +33 27 58.0   15.65       SNIa 77 1
5 SN 1998dm SN* 01 26 13.97 -06 06 14.0   14.70       SNIa 71 1
6 SN 2007qg SN* 01 32 01.97 -00 25 47.0           SNIa 15 1
7 SN 2007ol SN* 01 37 23.696 -00 18 43.19           SNIa 36 1
8 SN 2006nw SN* 02 02 55.95 -00 32 01.9           SNIa 16 1
9 SNLS 05D1cb SN* 02 26 57.056 -04 07 03.24         20.89 SNIa 15 0
10 SNLS 04D1rh SN* 02 27 47.148 -04 15 13.56         21.29 SNIa 19 1
11 SN 2007jk SN* 02 55 05.40 -00 08 51.7           SNIa 28 1
12 SN 2007jd SN* 02 59 53.688 +01 09 36.83           SNIa 31 1
13 SN 2007qs SN* 03 11 46.03 +00 05 30.9           SNIa 12 1
14 SN 2007lm SN* 03 13 40.44 +00 37 47.9           SNIa 17 1
15 SN 1999ao SN* 06 27 26.37 -35 50 24.2     18.2     SNIa 16 1
16 SN 2000fa SN* 07 15 29.88 +23 25 42.4   15.85       SNIa 90 1
17 SN 1997do SN* 07 26 42.50 +47 05 36.0   14.27       SNIa 74 1
18 SN 1999gd SN* 08 38 24.61 +25 45 33.1   16.94       SNIa 72 1
19 SN 1999ar SN* 09 20 16.00 +00 33 39.6       19.7   SNIa 9 1
20 SNLS 05D2ac SN* 09 58 59.235 +02 29 22.21         18.75 SNIa 18 1
21 SNLS 06D2cc SN* 09 59 26.887 +02 27 04.88         19.88 SNIa 15 0
22 SNLS 04D2fp SN* 09 59 28.120 +02 19 15.65         19.87 SNIa 26 2
23 SNLS 04D2fs SN* 10 00 22.086 +01 45 55.43         23.66 SNIa 24 2
24 SNLS 04D2mc SN* 10 00 35.550 +01 47 03.05         18.93 SNIa 16 0
25 SNLS 05D2dy SN* 10 00 58.098 +02 10 59.16         24.93 SNIa 16 1
26 SN 2003cg SN* 10 14 15.97 +03 28 02.5   15.94       SNIa 146 1
27 SN 2002bo SN* 10 18 06.51 +21 49 41.7   13.95       SNIa 325 1
28 SN 1998bu SN* 10 46 46.01 +11 50 07.5   12.11       SNIa 328 1
29 SN 1989B SN* 11 20 13.93 +13 00 18.9   12.25       SNIa 372 1
30 SN 1998aq SN* 11 56 25.87 +55 07 43.2   12.31 14.9     SNIa 197 1
31 SN 1999bn SN* 11 57 00.40 -11 26 38.4     19.6     SNIa 12 1
32 SN 1991bg SN* 12 25 03.70 +12 52 15.6   14.75 14.3     SNIapec 612 1
33 SN 1999cl SN* 12 31 56.01 +14 25 35.3   14.92       SNIa 125 1
34 SN 1991T SN* 12 34 10.20 +02 39 56.4   11.70 11.51     SNIapec 795 1
35 SN 1990N SN* 12 42 56.68 +13 15 23.4   12.69 12.62     SNIa 406 1
36 SN 1999bm SN* 12 45 00.84 -06 27 30.2     20.5     SNIa 17 1
37 SN 1996X SN* 13 18 01.13 -26 50 45.3   12.99 13.00     SNIa 198 1
38 SN 2003du SN* 14 34 35.80 +59 20 03.8   13.46       SNIa 374 1
39 SN 2005cf SN* 15 21 33.12 -07 26 57.1   13.54       SNIa 301 1
40 SN 2000cf SN* 15 52 56.19 +65 56 12.7   17.15       SNIa 57 1
41 SN 1991M SN* 15 58 34.82 +17 27 28.7     14.55     SNIa 66 1
42 SN 1999cc SN* 16 02 42.03 +37 21 34.4   16.78       SNIa 83 1
43 SN 2002er SN* 17 11 29.88 +07 59 44.8   14.25       SNIa 144 1
44 SN 1998V SN* 18 22 37.40 +15 42 08.4   15.07       SNIa 72 1
45 SN 2006kq SN* 21 15 36.49 -00 19 18.2           SNIa 30 1
46 SN 2007ql SN* 21 29 43.66 +00 26 40.6           SNIa 13 1
47 SN 2007pf SN* 22 11 43.200 +00 34 45.68           SNIa 22 1
48 SNLS 03D4at SN* 22 14 24.040 -17 46 36.22         23.28 SNIa 23 1
49 SNLS 04D4bq SN* 22 14 49.424 -17 49 39.34         23.79 SNIa 23 2
50 SNLS 05D4cw SN* 22 14 50.080 -17 44 19.56         19.76 SNIa 19 0
51 SNLS 05D4ek SN* 22 16 27.517 -17 44 10.74         20.01 SNIa 15 0
52 SNLS 05D4be SN* 22 16 53.388 -17 14 09.96         22.19 SNIa 15 0
53 SN 1998eg SN* 22 39 30.29 +08 36 20.6   16.11       SNIa 68 1
54 SN 2007pu SN* 22 45 58.320 -00 38 55.99           SNIa 15 1
55 SN 2006fx SN* 22 46 16.32 +00 24 58.4           SNIa 24 1
56 SN 1997dt SN* 23 00 02.930 +15 58 50.92           SNIa 58 1
57 SN 1998dh SN* 23 14 40.31 +04 32 14.1   13.85       SNIa 92 1

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