The Axially Symmetric Ejecta of Supernova 1987A

Abstract

Extensive early observations proved that the ejecta of supernova 1987A (SN 1987A) are aspherical. Fifteen years after the supernova explosion, the Hubble Space Telescope has resolved the rapidly expanding ejecta. The late-time images and spectroscopy provide a geometrical picture that is consistent with early observations and suggests a highly structured, axially symmetric geometry. We present here a new synthesis of the old and new data. We show that the Bochum event, presumably a clump of ${}^{56}$Ni, and the late-time image, the locus of excitation by ${}^{44}$Ti, are most naturally accounted for by sharing a common position angle of about 14\degree, the same as the mystery spot and early speckle data on the ejecta, and that they are both oriented along the axis of the inner circumstellar ring at 45\degree to the plane of the sky. We also demonstrate that the polarization represents a prolate geometry with the same position angle and axis as the early speckle data and the late-time image and hence that the geometry has been fixed in time and throughout the ejecta. The Bochum event and the Doppler kinematics of the [Ca II]/[O II] emission in spatially resolved HST spectra of the ejecta can be consistently integrated into this geometry. The radioactive clump is deduced to fall approximately along the axis of the inner circumstellar ring and therefore to be redshifted in the North whereas the [Ca II]/[O II] 7300 Åemission is redshifted in the South. We present a jet-induced model for the explosion and argue that such a model can account for many of the observed asymmetries. In the jet models, the oxygen and calcium are not expected to be distributed along the jet, but primarily in an expanding torus that shares the plane and northern blue shift of the inner circumstellar ring.

To Appear in ApJ

References in corpus (17)

• Collapsars - Gamma-Ray Bursts and Explosions in "Failed Supernovae"
• Asymmetric Supernovae, Pulsars, Magnetars, and Gamma-Ray Bursts
• Jet-Induced Explosions of Core Collapse Supernovae
• Core-Collapse Simulations of Rotating Stars
• Evidence for Asphericity in the Type IIn Supernova 1998S
• Asymmetric Supernovae from Magneto-Centrifugal Jets
• Is it Round? Spectropolarimetry of the Type II-P Supernova 1999em
• Aspherical Explosion Models for SN 1998bw/GRB 980425
• The Line Emission from the Circumstellar Gas Around SN 1987A
• Broad Band Polarimetry of Supernovae: SN1994D, SN1994Y, SN1994ae, SN1995D and SN 1995H
• Spectropolarimetry of the Type II Supernovae 1997ds, 1998A, and 1999gi
• Effects of Jet-like Explosion in SN 1987A
• Probing the Geometry and Circumstellar Environment of SN 1993J in M81
• Hubble Space Telescope Spectroscopic Observations of the Ejecta of SN 1987A at 2000 Days
• A Second Bright Source Detected Near SN1987A
• Polarization of SN 1987A Revisited
• The Late-time Expansion of the Ejecta of SN 1987A

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