2018MNRAS.473.4257C


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.19CEST19:15:06

2018MNRAS.473.4257C - Mon. Not. R. Astron. Soc., 473, 4257-4267 (2018)

A spectroscopic look at the gravitationally lensed Type Ia supernova 2016geu at z = 0.409.

CANO Z., SELSING J., HJORTH J., DE UGARTE POSTIGO A., CHRISTENSEN L., GALL C. and KANN D.A.

Abstract (from CDS):

The spectacular success of Type Ia supernovae (SNe Ia) in SN-cosmology is based on the assumption that their photometric and spectroscopic properties are invariant with redshift. However, this fundamental assumption needs to be tested with observations of high-z SNe Ia. To date, the majority of SNe Ia observed at moderate to large redshifts (0.4 <= z <= 1.0) are faint, and the resultant analyses are based on observations with modest signal-to-noise ratios that impart a degree of ambiguity in their determined properties. In rare cases, however, the Universe offers a helping hand: To date a few SNe Ia have been observed that have had their luminosities magnified by intervening galaxies and galaxy clusters acting as gravitational lenses. In this paper, we present long-slit spectroscopy of the lensed SN Ia 2016geu, which occurred at a redshift of z = 0.409, and was magnified by a factor of ≃55 by a galaxy located at z = 0.216. We compared our spectra, which were obtained a couple of weeks to a couple of months past peak light, with the spectroscopic properties of well-observed, nearby SNe Ia, finding that SN 2016geu's properties are commensurate with those of SNe Ia in the local Universe. Based primarily on the velocity and strength of the Si II λ6355 absorption feature, we find that SN 2016geu can be classified as a high-velocity, high-velocity-gradient and 'core-normal' SN Ia. The strength of various features (measured though their pseudo-equivalent widths) argue against SN 2016geu being a faint, broad-lined, cool or shallow-silicon SN Ia. We conclude that the spectroscopic properties of SN 2016geu imply that it is a normal SN Ia, and when taking previous results by other authors into consideration, there is very little, if any, evolution in the observational properties of SNe Ia up to z ≃ 0.4.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): gravitational lensing: strong - supernovae: general - supernovae: individual: SN 2016geu - cosmology: miscellaneous

Simbad objects: 23

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Number of rows : 23

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 HFF 14Tom SN* 00 14 17.87 -30 23 59.7           SNIa 14 0
2 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 582 0
3 SN 2009ig SN* 02 38 11.62 -01 18 45.3           SNIa 119 1
4 SN 2006is SN* 05 17 34.37 -23 46 54.2     17.0     SNIa 27 1
5 SN 1999aa SN* 08 27 42.03 +21 29 14.8           SNIap 231 1
6 SN 2014J SN* 09 55 42.12 +69 40 25.9           SNIa 319 1
7 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5367 6
8 SN 2002bo SN* 10 18 06.51 +21 49 41.7   13.95       SNIa 279 1
9 NAME SN Refsdal SN* 11 49 36.010 +22 23 48.13           ~ 63 0
10 SN 2006X SN* 12 22 53.93 +15 48 32.0     15.3     SNIa 282 1
11 SN 1991bg SN* 12 25 03.70 +12 52 15.6   14.75 14.3     SNIapec 528 1
12 SN 1984A SN* 12 26 55.73 +15 03 17.1   12.40 12.20     SNIa 131 1
13 SN 1994D SN* 12 34 02.395 +07 42 05.70   11.75 12.03     SNIa 520 1
14 NGC 4526 GiG 12 34 03.029 +07 41 56.90   10.6       ~ 602 1
15 SN 1991T SN* 12 34 10.20 +02 39 56.4   11.70 11.51     SNIapec 702 1
16 SN 2011fe SN* 14 03 05.711 +54 16 25.22   10.12 10.06     SNIa 519 1
17 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2575 2
18 SN 2005cf SN* 15 21 33.12 -07 26 57.1   13.54       SNIa 239 1
19 SN 2016geu SN* 21 04 15.86 -06 20 24.5           SNIa 30 0
20 SDSS J210415.89-062024.7 G 21 04 15.894 -06 20 24.79           ~ 2 0
21 PS1-10afx SN* 22 11 24.162 +00 09 43.49           SNIa 34 0
22 SN 2013dy SN* 22 18 17.60 +40 34 09.6           SNIa 76 0
23 SN 2005ku SN* 22 59 42.61 +00 00 49.3   20.7       SNIa 34 1

    Equat.    Gal    SGal    Ecl

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2020.10.19-19:15:06

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