The Destruction of the Circumstellar Ring of SN 1987A
We present imaging and spectroscopic observations with HST and VLT 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 ~8,000 (~2009), both this and the unshocked emission are now fading. From the radial positions of the...
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| creator | Fransson, Claes Larsson, Josefin Migotto, Katia Pesce, Dominic Challis, Peter Chevalier, Roger A France, Kevin Kirshner, Robert P Leibundgut, Bruno Lundqvist, Peter McCray, Richard Spyromilio, Jason Taddia, Francesco Jerkstrand, Anders Mattila, Seppo Smith, Nathan Sollerman, Jesper Wheeler, J Craig Crotts, Arlin Garnavich, Peter Heng, Kevin Lawrence, Stephen S Panagia, Nino Pun, Chun S J Sonneborn, George Sugerman, Ben |
| description | We present imaging and spectroscopic observations with HST and VLT 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 ~8,000 (~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, 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 ~2025. |
| doi_str_mv | 10.48550/arxiv.1505.06669 |
| format | Article |
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After an almost exponential increase of the shocked emission from the hotspots up to day ~8,000 (~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, 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. 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After an almost exponential increase of the shocked emission from the hotspots up to day ~8,000 (~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, 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 ~2025.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><doi>10.48550/arxiv.1505.06669</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Acceleration Ejecta Physics - High Energy Astrophysical Phenomena Physics - Solar and Stellar Astrophysics Spectroscopy |
| title | The Destruction of the Circumstellar Ring of SN 1987A |
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