Double-peaked oxygen lines are not rare in nebular spectra of core-collapse supernovae

M. Modjaz; R. P. Kirshner; S. Blondin; P. Challis; T. Matheson

doi:10.1086/593135

Double-peaked oxygen lines are not rare in nebular spectra of core-collapse supernovae

M. Modjaz, R. P. Kirshner, S. Blondin, P. Challis, T. Matheson

Research output: Contribution to journal › Article › peer-review

Abstract

Double-peaked oxygen lines in the nebular spectra of two peculiar Type Ib/c supernovae (SNe Ib/c) have been interpreted as off-axis views of a GRB jet or unipolar blob ejections. Here we present late-time spectra of eight SNe IIb, Ib, and Ic and show that this phenomenon is common and should not be so firmly linked to extraordinary explosion physics. The line profiles are most likely caused by ejecta expanding with a torus- or disk-like geometry. Double-peaked oxygen profiles are not necessarily the indicator of a misdirected GRB jet.

Original language	English (US)
Pages (from-to)	L9-L12
Journal	Astrophysical Journal
Volume	687
Issue number	1
DOIs	https://doi.org/10.1086/593135
State	Published - Nov 1 2008

Keywords

Bursts-supernovae
Gamma rays
General

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/593135

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abstract = "Double-peaked oxygen lines in the nebular spectra of two peculiar Type Ib/c supernovae (SNe Ib/c) have been interpreted as off-axis views of a GRB jet or unipolar blob ejections. Here we present late-time spectra of eight SNe IIb, Ib, and Ic and show that this phenomenon is common and should not be so firmly linked to extraordinary explosion physics. The line profiles are most likely caused by ejecta expanding with a torus- or disk-like geometry. Double-peaked oxygen profiles are not necessarily the indicator of a misdirected GRB jet.",

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T1 - Double-peaked oxygen lines are not rare in nebular spectra of core-collapse supernovae

AU - Modjaz, M.

AU - Kirshner, R. P.

AU - Blondin, S.

AU - Challis, P.

AU - Matheson, T.

PY - 2008/11/1

Y1 - 2008/11/1

N2 - Double-peaked oxygen lines in the nebular spectra of two peculiar Type Ib/c supernovae (SNe Ib/c) have been interpreted as off-axis views of a GRB jet or unipolar blob ejections. Here we present late-time spectra of eight SNe IIb, Ib, and Ic and show that this phenomenon is common and should not be so firmly linked to extraordinary explosion physics. The line profiles are most likely caused by ejecta expanding with a torus- or disk-like geometry. Double-peaked oxygen profiles are not necessarily the indicator of a misdirected GRB jet.

AB - Double-peaked oxygen lines in the nebular spectra of two peculiar Type Ib/c supernovae (SNe Ib/c) have been interpreted as off-axis views of a GRB jet or unipolar blob ejections. Here we present late-time spectra of eight SNe IIb, Ib, and Ic and show that this phenomenon is common and should not be so firmly linked to extraordinary explosion physics. The line profiles are most likely caused by ejecta expanding with a torus- or disk-like geometry. Double-peaked oxygen profiles are not necessarily the indicator of a misdirected GRB jet.

KW - Bursts-supernovae

KW - Gamma rays

KW - General

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Double-peaked oxygen lines are not rare in nebular spectra of core-collapse supernovae

Abstract

Keywords

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