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X-ray illumination of the ejecta of supernova 1987A
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- Larsson, Josefin (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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- Fransson, Claes (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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- Östlin, Göran (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
- show more...
- Challis, P. (author)
- Kirshner, R. P. (author)
- Chevalier, R. A. (author)
- Heng, K. (author)
- McCray, R. (author)
- Suntzeff, N. B. (author)
- Bouchet, P. (author)
- Crotts, A. (author)
- Danziger, J. (author)
- Dwek, E. (author)
- France, K. (author)
- Garnavich, P. M. (author)
- Lawrence, S. S. (author)
- Leibundgut, B. (author)
- Panagia, N. (author)
- Pun, C. S. J. (author)
- Smith, N. (author)
- Sonneborn, G. (author)
- Wang, L. (author)
- Wheeler, J. C. (author)
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- (creator_code:org_t)
- 2011-06-08
- 2011
- English.
- In: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 474:7352, s. 484-486
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- When a massive star explodes as a supernova, substantial amounts of radioactive elements-primarily (56)Ni, (57)Ni and (44)Ti-are produced(1). After the initial flash of light from shock heating, the fading light emitted by the supernova is due to the decay of these elements(2). However, after decades, the energy powering a supernova remnant comes from the shock interaction between the ejecta and the surrounding medium(3). The transition to this phase has hitherto not been observed: supernovae occur too infrequently in the Milky Way to provide a young example, and extragalactic supernovae are generally too faint and too small. Here we report observations that show this transition in the supernova SN 1987A in the Large Magellanic Cloud. From 1994 to 2001, the ejecta faded owing to radioactive decay of (44)Ti as predicted. Then the flux started to increase, more than doubling by the end of 2009. We show that this increase is the result of heat deposited by X-rays produced as the ejecta interacts with the surrounding material. In time, the X-rays will penetrate farther into the ejecta, enabling us to analyse the structure and chemistry of the vanished star.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
- Larsson, Josefin
- Fransson, Claes
- Östlin, Göran
- Gröningsson, P.
- Jerkstrand, Ande ...
- Kozma, Cecilia
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- Sollerman, Jespe ...
- Challis, P.
- Kirshner, R. P.
- Chevalier, R. A.
- Heng, K.
- McCray, R.
- Suntzeff, N. B.
- Bouchet, P.
- Crotts, A.
- Danziger, J.
- Dwek, E.
- France, K.
- Garnavich, P. M.
- Lawrence, S. S.
- Leibundgut, B.
- Lundqvist, Peter
- Panagia, N.
- Pun, C. S. J.
- Smith, N.
- Sonneborn, G.
- Wang, L.
- Wheeler, J. C.
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- Nature
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- Stockholm University
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