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X-ray illumination of the ejecta of Supernova 1987A

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arxiv 1106.2300 v1 pith:YAC562EP submitted 2011-06-12 astro-ph.SR

classification astro-ph.SR
keywords ejectasupernovaenergyfluxincreaseobservationsaccompanyingaround
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We present the late-time optical light curve of the ejecta of SN 1987A measured from HST imaging observations spanning the past 17 years. We find that the flux from the ejecta declined up to around year 2001, powered by the radioactive decay of 44Ti. Then the flux started to increase, more than doubling by the end of 2009. We show that the increase is the result of energy deposited by X-rays produced in the interaction with the circumstellar medium. We suggest that the change of the dominant energy input to the ejecta, from internal to external, marks the transition from supernova to supernova remnant. The details of the observations and the modelling are described in the accompanying supplementary information.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. HCO$^+$ and the Effect of Mixing in SN 1987A

    astro-ph.SR 2026-07 conditional novelty 6.0 of 10

    In SN 1987A's inner ejecta, HCO+ is co-spatial with CO, and its two-line RADEX mass of 3–9×10^-6 solar masses implies hydrogen was mixed into the carbon-oxygen zones.

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