2007A&A...470L...1S


Query : 2007A&A...470L...1S

2007A&A...470L...1S - Astronomy and Astrophysics, volume 470, L1-4 (2007/7-4)

Late-time emission of type Ia supernovae: optical and near-infrared observations of SN 2001el.

STRITZINGER M. and SOLLERMAN J.

Abstract (from CDS):

To elucidate the nature of the late-phase emission of the normal type Ia supernova SN 2001el. We present optical and near-infrared light curves of SN 2001el from 310 to 445 days past maximum light, obtained with the Very Large Telescope. The late-time optical (UBVRI) light curves decay in a nearly linear fashion with decay time scales of 1.43±0.14, 1.43±0.06, 1.48±0.06, 1.45±0.07, and 1.03±0.07 magnitudes (per hundred days) in the U, B, V, R, and I bands, respectively. In contrast, in the near-infrared (JHKs) bands the time evolution of the flux appears to be nearly constant at these epochs. We measure decline rates (per hundred days) of 0.19±0.10 and 0.17±0.11 magnitudes in the J and H bands, respectively. We construct a UVOIR light curve, and find that the late-time luminosity has a decay time scale nearly consistent with complete depostion of positron kinetic energy. The late-time light curves of the normal type Ia SN 2001el demonstrate the increased importance of the near-infrared contribution. This was previously observed in the peculiar SN 2000cx, and the results for SN 2001el thus ensure that the conclusions previously based on a single peculiar event are applicable to normal type Ia supernovae. The measured late-time UVOIR decline rate suggests that a majority of the positrons are trapped within the ejecta. This result does not favor the prediction of a weak and/or radially combed magnetic field configuration.

Abstract Copyright:

Journal keyword(s): stars: supernovae: general - stars: supernovae: individual: SN 2001el

CDS comments: Paragraph 2.1. PG 41528+062 is a misprint for PG 1528+062.

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 SN 2000cx SN* 01 24 46.19 +09 30 31.3   13.3       SNIap 203 1
2 SN 2001el SN* 03 44 30.60 -44 38 23.4   12.81       SNIa 246 1
3 NGC 1448 GiG 03 44 31.915 -44 38 41.38   11.46   10.24 10.9 ~ 235 0
4 SN 2004S SN* 06 45 43.50 -31 13 52.5   14.14 14.39     SNIa 66 1
5 SN 2003cg SN* 10 14 15.97 +03 28 02.5   15.94       SNIa 127 1
6 EGGR 70 WD* 10 33 42.7629684770 -11 41 38.339441758 11.851 12.847 13.012 13.138 13.278 DA1.9 107 0
7 SN 1998bu SN* 10 46 46.01 +11 50 07.5   12.11       SNIa 302 1
8 PG 1528+062 HS* 15 30 49.9257698452 +06 00 56.279611967 13.424 14.515 14.767 14.878 15.063 sdOB 30 0
9 [L92b] Mark A HS* 20 43 59.2255386146 -10 47 41.693629843 11.854 13.010 13.256 13.370 13.494 sdO 68 1
10 GD 246 WD* 23 12 21.6156138550 +10 47 04.257261526 11.578 12.772 13.090 13.238 13.418 DA.9 206 0
11 Feige 108 HS* 23 16 12.4076810797 -01 50 35.101919760 11.671 12.736 12.973 13.079 13.218 sdB 63 0

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2021.10.26-05:46:00

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