2018MNRAS.475.1756B


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.16CEST20:07:00

2018MNRAS.475.1756B - Mon. Not. R. Astron. Soc., 475, 1756-1764 (2018/April-1)

SN 2014C: VLBI images of a supernova interacting with a circumstellar shell.

BIETENHOLZ M.F., KAMBLE A., MARGUTTI R., MILISAVLJEVIC D. and SODERBERG A.

Abstract (from CDS):

We report on very long baseline interferometry (VLBI) measurements of supernova 2014C at several epochs between t = 384 and 1057 d after the explosion. SN 2014C was an unusual supernova that initially had Type Ib optical spectrum, but after t = 130 d it developed a Type IIn spectrum with prominent Hα lines, suggesting the onset of strong circumstellar interaction. Our first VLBI observation was at t = 384 d, and we find that the outer radius of SN 2014C was (6.40 ± 0.26) x 1016 cm (for a distance of 15.1 Mpc), implying an average expansion velocity of 19 300 ± 790 km s–1 up to that time. At our last epoch, SN 2014C was moderately resolved and shows an approximately circular outline but with an enhancement of the brightness on the W side. The outer radius of the radio emission at t = 1057 d is (14.9 ± 0.6) x 1016 cm. We find that the expansion between t = 384 and 1057 d is well described by a constant velocity expansion with v = 13 600 ± 650 km s–1. SN 2014C had clearly been substantially decelerated by t = 384 d. Our measurements are compatible with a scenario where the expanding shock impacted upon a shell of dense circumstellar material during the first year, as suggested by the observations at other wavelengths, but had progressed through the dense shell by the time of the VLBI observations.

Abstract Copyright: © 2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): supernovae: individual: SN 2014C - radio continuum: general

Simbad objects: 9

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Number of rows : 9

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 1986J SN* 02 22 31.33 +42 19 56.4   18.4 18.4     SNII 309 1
2 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4586 2
3 SN 1993J SN* 09 55 24.77476 +69 01 13.7026   10.8 12.0     SNIIb 1289 1
4 * eta Car Em* 10 45 03.545808 -59 41 03.95124 6.37 7.03 6.48 4.90 4.41 OBepec 2268 0
5 SN 2011dh SN* 13 30 05.10555 +47 10 10.9227           SNIIb 306 1
6 NVSS J223555+341837 Rad 22 35 55.4085599 +34 18 36.972856           ~ 8 1
7 NGC 7331 LIN 22 37 04.102 +34 24 57.31 10.65 10.35 9.48     ~ 1135 2
8 SN 2014C SN* 22 37 05.60 +34 24 31.9           SNIb 70 1
9 [VV98] J224837.9+371812 QSO 22 48 37.91049719 +37 18 12.4630616     18.90 19.8   ~ 24 1

    Equat.    Gal    SGal    Ecl

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2021.05.16-20:07:00

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