2018A&A...614A..71N

Query : 2018A&A...614A..71N

2018A&A...614A..71N - Astronomy and Astrophysics, volume 614A71-71 (2018/6-1)

Understanding type Ia supernovae through their U-band spectra.

NORDIN J., ALDERING G., ANTILOGUS P., ARAGON C., BAILEY S., BALTAY C., BARBARY K., BONGARD S., BOONE K., BRINNEL V., BUTON C., CHILDRESS M., CHOTARD N., COPIN Y., DIXON S., FAGRELIUS P., FEINDT U., FOUCHEZ D., GANGLER E., HAYDEN B., HILLEBRANDT W., KIM A., KOWALSKI M., KUESTERS D., LEGET P.-F., LOMBARDO S., LIN Q., PAIN R., PECONTAL E., PEREIRA R., PERLMUTTER S., RABINOWITZ D., RIGAULT M., RUNGE K., RUBIN D., SAUNDERS C., SMADJA G., SOFIATTI C., SUZUKI N., TAUBENBERGER S., TAO C., THOMAS R.C. (The Nearby Supernova Factory Collaboration)

Abstract (from CDS):


Context. Observations of type Ia supernovae (SNe Ia) can be used to derive accurate cosmological distances through empirical standardization techniques. Despite this success neither the progenitors of SNe Ia nor the explosion process are fully understood. The U-band region has been less well observed for nearby SNe, due to technical challenges, but is the most readily accessible band for high-redshift SNe.
Aims. Using spectrophotometry from the Nearby Supernova Factory, we study the origin and extent of U-band spectroscopic variations in SNe Ia and explore consequences for their standardization and the potential for providing new insights into the explosion process.
Methods. We divide the U-band spectrum into four wavelength regions λ(uNi), λ(uTi), λ(uSi) and λ(uCa). Two of these span the CaH&Kλλ 3934, 3969 complex. We employ spectral synthesis using SYNAPPS to associate the two bluer regions with Ni/Co and Ti.
Results. The flux of the uTi feature is an extremely sensitive temperature/luminosity indicator, standardizing the SN peak luminosity to 0.116 ± 0.011 mag root mean square (RMS). A traditional SALT2.4 fit on the same sample yields a 0.135 mag RMS. Standardization using uTi also reduces the difference in corrected magnitude between SNe originating from different host galaxy environments. Early U-band spectra can be used to probe the Ni+Co distribution in the ejecta, thus offering a rare window into the source of light curve power. The uCa flux further improves standardization, yielding a 0.086 ± 0.010 mag RMS without the need to include an additional intrinsic dispersion to reach χ2/dof ∼ 1. This reduction in RMS is partially driven by an improved standardization of Shallow Silicon and 91T-like SNe.

Abstract Copyright: © ESO 2018

Journal keyword(s): supernovae: general - cosmology: observations - dark energy

VizieR on-line data: <Available at CDS (J/A+A/614/A71): list.dat sp/*>

Simbad objects: 102

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Number of rows : 102
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 SNF 20080919-000 SN* 00 03 34.63 +24 13 00.4           ~ 2 0
2 SNF 20070810-004 SN* 00 04 57.40 -06 21 11.8           SNIa 6 0
3 SNF 20071021-000 SN* 00 15 00.089 +16 19 59.35           SNIa 17 1
4 PTF 10wnm SN* 00 22 03.6960671352 +27 02 21.519078396   18.17 18.13     SNIa 19 0
5 2MASS J00361352+0710005 SN* 00 36 13.5318682992 +07 10 00.640920180           SNIa 5 0
6 PTF 09foz SN* 00 42 11.9 -09 52 54           ~ 17 0
7 SNF 20060916-002 SN* 00 50 35.42 +04 47 40.5           ~ 3 0
8 SNF 20080918-004 SN* 00 59 58.85 -09 00 32.9           SNIa 5 0
9 SNF 20080720-001 SN* 01 05 27.31 +37 51 07.9           SNIa 10 0
10 SNF 20070818-001 SN* 01 10 55.27 -06 27 09.0           SNIa 6 0
11 SN 2005ir SN* 01 16 43.752 +00 47 40.36           SNIa 67 1
12 SNF 20070902-018 SN* 01 21 09.329 -04 14 11.75           ~ 7 0
13 SN 2005hj SN* 01 26 48.40 -01 14 17.2       17.40   SNIa 100 1
14 SNF 20050821-007 SN* 01 30 29.25 +09 14 24.7           ~ 3 0
15 SNF 20070817-003 SN* 01 37 36.98 -09 11 40.5           SNIa 8 0
16 SNF 20080825-010 SN* 01 37 40.94 -13 18 53.6           SNIa 8 0
17 SN 2006ob SN* 01 51 48.132 +00 15 48.46           SNIa 68 1
18 SN 2005hc SN* 01 56 47.976 -00 12 48.62           SNIa 99 1
19 SN 2004dt SN* 02 02 12.770 -00 05 51.50           SNIa 150 1
20 SNF 20080913-031 SN* 02 11 32.3 +23 53 07           ~ 6 0
21 PTF 10zdk SN* 02 14 07.326 +23 37 50.17           SNIa 8 0
22 SNF 20080920-000 SN* 02 20 34.12 +04 27 17.2           SNIa 5 0
23 SNF 20080919-002 SN* 02 25 21.00 -08 39 03.2           ~ 4 0
24 SN 2010hs SN* 02 25 39.14 +24 45 53.6   18.31 18.39     SNIa 28 1
25 SN 2010gy SN* 02 27 12.00 -04 32 05.2   18.21 18.31     SNIa 29 1
26 SN 2005eu SN* 02 27 43.30 +28 10 37.8     17.6     SNIa 67 2
27 SNF 20071003-004 SN* 02 44 48.74 -16 19 30.0           ~ 3 0
28 SNF 20061011-005 SN* 02 46 40.41 -01 48 18.3           ~ 3 0
29 SN 2011iv SN* 03 38 51.4 -35 35 32           SNIa-norm 96 1
30 SNF 20080914-001 SN* 04 57 27.04 +00 04 16.6           ~ 3 0
31 SN 2005el SN* 05 11 48.76 +05 11 39.0     18.7     SNIa 118 1
32 LSQ 12fxd SN* 05 22 16.99 -25 35 47.0           SNIa 19 1
33 SN 2015F SN* 07 36 15.76 -69 30 23.0           SNIa 100 1
34 SN 2007bd SN* 08 31 33.281 -01 11 57.98           SNIa 100 1
35 SN 2011be SN* 09 22 52.62 +21 59 15.7           SNIa 7 1
36 SN 2010jn SN* 09 37 30.240 +23 09 33.30   17.29 16.85     SNIa 38 1
37 SN 2002bo SN* 10 18 06.51 +21 49 41.7   13.95       SNIa 325 1
38 SNF 20070420-001 SN* 10 34 51.26 +16 06 39.9           ~ 2 0
39 SN 2011bc SN* 12 04 32.94 +20 12 11.4           SNIa 13 1
40 SN 2010dm SN* 12 11 33.31 +47 16 28.5   17.33 17.14 19.5   SNIa 27 1
41 SN 2006X SN* 12 22 53.93 +15 48 32.0     15.3     SNIa 347 1
42 PTF 10icb SN* 12 54 49.16 +58 52 55.1   14.48 14.42 17.4   SNIa 20 0
43 SN 2006cj SN* 12 59 24.42 +28 20 51.6     18.1     SNIa 46 1
44 SNF 20080514-002 SN* 13 29 12.84 +11 16 20.5           SNIa 47 0
45 SNF 20080522-000 SN* 13 36 47.61 +05 08 32.6           SNIa 26 0
46 SNF 20070330-024 SN* 13 38 13.68 -20 20 48.8           ~ 4 0
47 SNF 20060618-023 SN* 13 57 58.65 -03 57 30.6           ~ 2 0
48 SN 2011fe SN* 14 03 05.711 +54 16 25.22   10.12 10.06     SNIa-norm 747 1
49 SNF 20060512-001 SN* 14 13 24.98 +17 46 59.8           ~ 8 0
50 SNF 20080614-010 SN* 14 26 53.08 +23 56 11.0           SNIa 5 0
51 SNF 20060526-003 SN* 14 43 02.5 -18 52 37           SNIa 6 0
52 SNF 20080510-001 SN* 14 56 13.27 +18 51 14.4           SNIa 6 0
53 SNF 20070424-003 SN* 14 57 54.52 +18 36 20.8           SNIa 5 0
54 SNF 20070506-006 SN* 15 09 34.63 +04 52 28.9           SNIa 9 0
55 SNF 20080610-000 SN* 15 13 49.27 +01 51 50.7           SNIa 5 0
56 PTF 09dnp SN* 15 19 24.5 +49 29 56           SNIa-norm 19 0
57 SNF 20080522-011 SN* 15 19 58.94 +04 54 16.5           SNIa 25 0
58 SN 2005cf SN* 15 21 33.12 -07 26 57.1   13.54       SNIa 301 1
59 SNF 20060609-002 SN* 16 04 30.45 +17 28 07.3           ~ 4 0
60 SNF 20080620-000 SN* 16 10 17.56 +22 43 31.4           ~ 7 0
61 SN 2008cl SN* 16 11 04.349 +52 27 07.99           SNIa 20 1
62 SNF 20070802-000 SN* 16 14 51.6 +56 23 56           SNIa 6 0
63 SNF 20080507-000 SN* 16 15 07.08 +50 16 41.5           ~ 5 0
64 SNF 20080531-000 SN* 16 17 00.0 +19 07 05           SNIa 6 0
65 SN 2013cv SN* 16 22 43.16 +18 57 35.6           SNIaPec 24 1
66 PTF 10qjl SN* 16 39 59.25 +12 06 26.6   17.79 17.89     SNIa 10 0
67 SNF 20070712-003 SN* 16 42 40.36 +50 35 50.2           SNIa 5 0
68 SN 2010dt SN* 16 43 15.062 +32 40 27.55           SNIa 23 1
69 2MASS J16503452+6016345 SN* 16 50 34.5006556632 +60 16 34.436277624   18.60 18.47     SNIa 17 0
70 SN 2008eq SN* 17 00 07.200 +23 07 56.60           SNIa 22 1
71 PTF 10qjq SN* 17 07 12.38 +35 30 36.0   16.08 16.00     SNIa 12 0
72 SN 2010gn SN* 17 17 50.11 +40 52 52.6   16.81 16.78     SNIa 32 1
73 PTF 10ndc SN* 17 19 49.87 +28 42 01.4   18.41 18.46     SNIa 13 0
74 SN 2009jb SN* 17 23 41.8 +30 29 50   1.05 1.07 18.5   SNIa-norm 24 1
75 SNF 20070717-003 SN* 17 26 18.98 +23 08 03.8           SNIa 4 0
76 SNF 20080810-001 SN* 17 39 37.77 +37 52 03.7           SNIa 6 0
77 SNF 20080623-001 SN* 18 11 39.79 +50 10 56.2           SNIa 9 0
78 SNF 20080821-000 SN* 20 24 20.18 +06 10 27.8           ~ 5 0
79 SNF 20060907-000 SN* 21 01 11.76 +21 24 01.8           ~ 6 0
80 SNF 20060621-015 SN* 21 15 32.01 -13 24 05.4           SNIa 6 0
81 PTF 09dlc SN* 21 46 30.00 +06 25 06.9   18.04 18.20 19.2   SNIa-norm 26 0
82 SNF 20050728-006 SN* 21 58 04.87 -14 00 01.8           ~ 4 0
83 SNF 20080909-030 SN* 22 01 49.070 +13 03 19.10           SNIa 18 1
84 SNF 20080926-009 SN* 22 08 22.75 -10 58 19.5           ~ 3 0
85 PS1-10afx SN* 22 11 24.162 +00 09 43.49           SNIa 46 0
86 SNF 20070803-005 SN* 22 26 23.66 +21 15 05.7           SNIa 7 0
87 SNF 20070831-015 SN* 22 31 25.709 +10 47 41.46           ~ 5 0
88 SN 2004ef SN* 22 42 10.020 +19 59 39.88           SNIa 107 1
89 SNF 20080626-002 SN* 22 45 02.47 +08 56 35.8           SNIa 5 0
90 SNF 20080908-000 SN* 22 47 12.67 -19 34 46.9           ~ 3 0
91 SN 2008ec SN* 23 03 16.560 +08 52 19.81           SNIa 64 1
92 PTF 10xyt SN* 23 19 02.42 +13 47 26.1   18.40 18.21     SNIa 15 0
93 SN 2010ho SN* 23 19 09.723 +09 11 45.55   17.15 17.12     SNIa 27 1
94 PTF 09fox SN* 23 20 47.800 +32 30 06.27   18.25 18.25 18.8   ~ 13 0
95 PTF 10yux SN* 23 24 13.39 +07 13 42.7   18.44 18.28     ~ 9 0
96 SN 2006do SN* 23 32 03.4 -27 43 33           SNIa 13 1
97 PTF 10wof SN* 23 32 41.37 +15 21 31.6   17.93 17.83     SNIa 17 0
98 SNF 20080918-000 SN* 23 33 19.34 +25 12 44.2           ~ 4 0
99 SNF 20070630-006 SN* 23 35 27.50 +19 13 25.6           SNIa 5 0
100 SNF 20080725-004 SN* 23 37 22.12 +19 55 52.6           ~ 5 0
101 SN 2007le SN* 23 38 48.45 -06 31 21.7     15.2     SNIa 139 1
102 SN 2006dm SN* 23 41 47.839 -03 40 08.40     17.3     SNIa 43 1

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