2014ApJ...790...17F


Query : 2014ApJ...790...17F

2014ApJ...790...17F - Astrophys. J., 790, 17 (2014/July-3)

Uncovering the putative B-star binary companion of the SN 1993J progenitor.

FOX O.D., BOSTROEM K.A., VAN DYK S.D., FILIPPENKO A.V., FRANSSON C., MATHESON T., CENKO S.B., CHANDRA P., DWARKADAS V., LI W., PARKER A.H. and SMITH N.

Abstract (from CDS):

The Type IIb supernova (SN) 1993J is one of only a few stripped-envelope SNe with a progenitor star identified in pre-explosion images. SN IIb models typically invoke H envelope stripping by mass transfer in a binary system. For the case of SN 1993J, the models suggest that the companion grew to 22 M and became a source of ultraviolet (UV) excess. Located in M81, at a distance of only 3.6 Mpc, SN 1993J offers one of the best opportunities to detect the putative companion and test the progenitor model. Previously published near-UV spectra in 2004 showed evidence for absorption lines consistent with a hot (B2 Ia) star, but the field was crowded and dominated by flux from the SN. Here we present Hubble Space Telescope Cosmic Origins Spectrograph and Wide-Field Camera 3 observations of SN 1993J from 2012, at which point the flux from the SN had faded sufficiently to potentially measure the UV continuum properties from the putative companion. The resulting UV spectrum is consistent with contributions from both a hot B star and the SN, although we cannot rule out line-of-sight coincidences.

Abstract Copyright:

Journal keyword(s): circumstellar matter - supernovae: general - supernovae: individual: SN 1993J

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4907 2
2 SN 1993J SN* 09 55 24.77476 +69 01 13.7026   10.8 12.0     SNIIb 1410 1
3 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4420 3
4 RX J0957.8+8529 WD* 09 57 54.2970820320 +85 29 40.876255140   15.46 15.72 16.11   DA1.0 38 0
5 [SBW2007] 1 ISM 10 40 19.3815092640 -59 49 09.886785960     12.7     B1Iab 36 1
6 SN 2013df SN* 12 26 29.33 +31 13 38.3           SNIIb 110 1
7 HD 168625 s*b 18 21 19.5484021368 -16 22 26.075142156 10.15 9.78 8.37 8.76   B8Ia+ 276 2
8 [VGF2002] A * ~ ~ 23.387 23.808 22.634 21.523 20.530 ~ 4 0
9 [VGF2002] F * ~ ~   25.04 24.85     ~ 2 0
10 [VGF2002] D * ~ ~ 22.961 23.704 23.827 23.907 23.906 ~ 4 0
11 [VGF2002] C * ~ ~ 23.079 23.708 23.681 23.742 23.304 ~ 4 0
12 [VGF2002] B * ~ ~ 23.080 23.088 22.989 23.042 22.917 ~ 4 0
13 [VGF2002] E * ~ ~   24.12 24.17     ~ 3 0
14 [VGF2002] G * ~ ~   24.44 24.42     ~ 2 0

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