2000A&A...359..876C


Query : 2000A&A...359..876C

2000A&A...359..876C - Astronomy and Astrophysics, volume 359, 876-886 (2000/7-3)

Epochs of maximum light and bolometric light curves of type Ia supernovae.

CONTARDO G., LEIBUNDGUT B. and VACCA W.D.

Abstract (from CDS):

We present empirical fits to the UBVRI light curves of type Ia supernovae. These fits are used to objectively evaluate light curve parameters. We find that the relative times of maximum light in the filter passbands are very similar for most objects. Surprisingly the maximum at longer wavelengths is reached earlier than in the B and V light curves. This clearly demonstrates the complicated nature of the supernova emission. Bolometric light curves for a small sample of well-observed SNe Ia are constructed by integration over the optical filters. In most objects a plateau or inflection is observed in the light curve about 20-40 days after bolometric maximum. The strength of this plateau varies considerably among the individual objects in the sample. Furthermore the rise times show a range of several days for the few objects which have observations early enough for such an analysis. On the other hand, the decline rate between 50 and 80 days past maximum is remarkably similar for all objects, with the notable exception of SN 1991bg. The similar late decline rates for the supernovae indicate that the energy release at late times are very uniform; the differences at early times are likely due to the radiation diffusing out of the ejecta. With the exception of SN 1991bg, the range of absolute bolometric luminosities of SNe Ia is found to be at least a factor of 2.5. The nickel masses derived from this estimate range from 0.4 to 1.1M. It seems impossible to explain such a mass range by a single explosion mechanism, especially since the rate of γ-ray escape at late phases seems to be very uniform.

Abstract Copyright:

Journal keyword(s): stars: supernovae: general - stars: fundamental parameters

Simbad objects: 29

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Number of rows : 29
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 SN 1992bo SN* 01 21 58.44 -34 12 43.5   15.85 15.76     SNIa 112 1
2 SN 1992bc SN* 03 05 16.05 -39 33 34.6   15.15 15.17     SNIa 126 1
3 SN 1981D SN* 03 22 39 -37 14.1   12.59 12.33     SNIa 88 1
4 SN 1980N SN* 03 22 59 -37 12.8   12.5 12.37     SNIa 144 1
5 SN 1992bs SN* 03 29 27.20 -37 16 18.9     18.28     SNIa 55 1
6 SN 1992A SN* 03 36 27.41 -34 57 31.4   12.56 12.50     SNIa 395 1
7 SN 1992bp SN* 03 36 37.95 -18 21 13.7   18.53 18.37     SNIa 64 1
8 SN 1995bd SN* 04 45 21.24 +11 04 02.5   17.29       SNIapec 63 1
9 SN 1992bh SN* 04 59 27.55 -58 49 44.2   17.68 17.55     SNIa 62 1
10 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4691 2
11 SN 1995E SN* 07 51 56.75 +73 00 34.6   16.81 15.9     SNIa 113 1
12 SN 1995D SN* 09 40 54.753 +05 08 26.16   13.42 13.22     SNIa 146 1
13 SN 1995al SN* 09 50 55.97 +33 33 09.4   13.36 13.22     SNIa 95 1
14 SN 1993ag SN* 10 03 35.00 -35 27 47.6   18.30 17.78     SNIa 66 1
15 SN 1994ae SN* 10 47 01.94 +17 16 30.8   13.20 12.99     SNIa 163 1
16 SN 1989B SN* 11 20 13.93 +13 00 18.9   12.25       SNIa 351 1
17 SN 1996B SN* 12 23 56.6 +48 46 41     18     SNII 10 1
18 SN 1991bg SN* 12 25 03.70 +12 52 15.6   14.75 14.3     SNIapec 559 1
19 SN 1994S SN* 12 31 21.85 +29 08 04.0   14.80 14.77     SNIa 103 1
20 SN 1994D SN* 12 34 02.395 +07 42 05.70   11.75 12.03     SNIa 533 1
21 SN 1991T SN* 12 34 10.20 +02 39 56.4   11.70 11.51     SNIapec 737 1
22 SN 1992P SN* 12 42 48.93 +10 21 36.2   16.14 16.09     SNIa 73 1
23 SN 1990N SN* 12 42 56.68 +13 15 23.4   12.69 12.62     SNIa 381 1
24 SN 1996X SN* 13 18 01.13 -26 50 45.3   12.99 13.00     SNIa 185 1
25 SN 1993O SN* 13 31 07.87 -33 12 50.5   17.79 17.96     SNIa 67 1
26 SN 1993H SN* 13 52 50.34 -30 42 23.3   16.99       SNIa 86 1
27 SN 1992al SN* 20 45 56.49 -51 23 39.9   14.59 14.54     SNIa 81 2
28 SN 1990af SN* 21 34 58.12 -62 44 07.4   17.91 17.75     SNIa 79 1
29 SN 1995ac SN* 22 45 34.14 -08 45 04.7   17.23 17.10     SNIapec 77 2

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2022.05.22-01:29:48

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