A Blast Wave from the 1843 Eruption of Eta Carinae

Abstract

Very massive stars shed much of their mass in violent precursor eruptions as luminous blue variables (LBVs) before reaching their most likely end as supernovae, but the cause of LBV eruptions is unknown. The 19th century eruption of Eta Carinae, the prototype of these events, ejected about 12 solar masses at speeds of 650 km/s, with a kinetic energy of almost 10^50 ergs. Some faster material with speeds up to 1000-2000 km/s had previously been reported but its full distribution was unknown. Here I report observations of much faster material with speeds up to 3500-6000 km/s, reaching farther from the star than the fastest material in earlier reports. This fast material roughly doubles the kinetic energy of the 19th century event, and suggests that it released a blast wave now propagating ahead of the massive ejecta. Thus, Eta Car's outer shell now mimics a low-energy supernova remnant. The eruption has usually been discussed in terms of an extreme wind driven by the star's luminosity, but fast material reported here suggests that it was powered by a deep-seated explosion rivalling a supernova, perhaps triggered by the pulsational pair instability. This may alter interpretations of similar events seen in other galaxies.

arXiv comment10 pages, 3 color figs, supplementary information. Accepted by Nature

References in corpus (17)

• The Nucleosynthetic Signature of Population III
• Pulsational pair instability as an explanation for the most luminous supernovae
• SN 2006gy: Discovery of the most luminous supernova ever recorded, powered by the death of an extremely massive star like Eta Carinae
• A giant outburst two years before the core-collapse of a massive star
• On the role of continuum-driven eruptions in the evolution of very massive stars and Population III stars
• SN 2006jc: A Wolf-Rayet Star Exploding in a Dense He-Rich Circumstellar Medium
• The Structure of the Homunculus: I. Shape and Latitude Dependence from H2 and [Fe II] Velocity Maps of Eta Carinae
• A Porosity-Length Formalism for Photon-Tiring-Limited Mass Loss from Stars Above the Eddington Limit
• In Hot Pursuit of the Hidden Companion of Eta Carinae: An X-ray Determination of the Wind Parameters
• SN 1997bs in M66: Another Extragalactic Eta Carinae Analog?
• Latitude-dependent effects in the stellar wind of Eta Carinae
• The porous atmosphere of eta Carinae
• Dissecting the Homunculus nebula around Eta Carinae with spatially resolved near-infrared spectroscopy
• Nitrogen and Oxygen Abundance Variations in the Outer Ejecta of Eta Carinae: Evidence for Recent Chemical Enrichment
• Early Chandra X-ray Observations of Eta Carinae
• High velocity structures in, and the X-ray emission from the LBV nebula around Eta Carinae
• Cleaning up Eta Carinae: Detection of Ammonia in the Homunculus

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