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THE DESTRUCTION OF THE CIRCUMSTELLAR RING OF SN 1987A
Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
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Number of Authors: 26
2015 (English)In: Astrophysical Journal Letters, ISSN 2041-8205, E-ISSN 2041-8213, Vol. 806, no 1, L19Article in journal (Refereed) Published
Abstract [en]

We present imaging and spectroscopic observations with Hubble Space Telescope and Very Large Telescope of the ring of SN 1987A from 1994 to 2014. After an almost exponential increase of the shocked emission from the hotspots up to day similar to 8000 (similar to 2009), both this and the unshocked emission are now fading. From the radial positions of the hotspots we see an acceleration of these up to 500-1000 km s(-1), consistent with the highest spectroscopic shock velocities from the radiative shocks. In the most recent observations (2013 and 2014), we find several new hotspots outside the inner ring, excited by either X-rays from the shocks or by direct shock interaction. All of these observations indicate that the interaction with the supernova ejecta is now gradually dissolving the hotspots. We predict, based on the observed decay, that the inner ring will be destroyed by similar to 2025.

Place, publisher, year, edition, pages
2015. Vol. 806, no 1, L19
Keyword [en]
circumstellar matter, shock waves, supernovae: individual (SN 1987A)
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-119147DOI: 10.1088/2041-8205/806/1/L19ISI: 000356633700019OAI: oai:DiVA.org:su-119147DiVA: diva2:845722
Available from: 2015-08-12 Created: 2015-07-29 Last updated: 2017-12-04Bibliographically approved

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Fransson, ClaesMigotto, KatiaLundqvist, PeterTaddia, FrancescoSollerman, Jesper
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