MAGNETAR-POWERED SUPERNOVAE IN TWO DIMENSIONS. I. SUPERLUMINOUS SUPERNOVAE

ABSTRACT Previous studies have shown that the radiation emitted by a rapidly rotating magnetar embedded in a young supernova can greatly amplify its luminosity. These one-dimensional studies have also revealed the existence of an instability arising from the piling up of radiatively accelerated matt...

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Bibliographic Details
Published in:The Astrophysical journal 2016-11, Vol.832 (1), p.73
Main Authors: Chen, Ke-Jung, Woosley, S. E., Sukhbold, Tuguldur
Format: Article
Language:English
Subjects:
Astronomy & Astrophysics
ASTRONOMY AND ASTROPHYSICS
Astrophysics
Ejecta
hydrodynamics
instabilities
Kinetic energy
Light curve
Luminosity
Magnetars
Neutrinos
Pulsars
Radiation
Radioactive decay
shock waves
stars: magnetars
stars: winds, outflows
Supernova
Supernova remnants
Supernovae
supernovae: general
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Summary:ABSTRACT Previous studies have shown that the radiation emitted by a rapidly rotating magnetar embedded in a young supernova can greatly amplify its luminosity. These one-dimensional studies have also revealed the existence of an instability arising from the piling up of radiatively accelerated matter in a thin dense shell deep inside the supernova. Here, we examine the problem in two dimensions and find that, while instabilities cause mixing and fracture this shell into filamentary structures that reduce the density contrast, the concentration of matter in a hollow shell persists. The extent of the mixing depends upon the relative energy input by the magnetar and the kinetic energy of the inner ejecta. The light curve and spectrum of the resulting supernova will be appreciably altered, as will the appearance of the supernova remnant, which will be shellular and filamentary. A similar pile up and mixing might characterize other events where energy is input over an extended period by a centrally concentrated source, e.g., a pulsar, radioactive decay, a neutrino-powered wind, or colliding shells. The relevance of our models to the recent luminous transient ASASSN-15lh is briefly discussed.
ISSN:0004-637X
1538-4357
1538-4357
DOI:10.3847/0004-637X/832/1/73