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Coronal emission from the shocked circumstellar ring of SN 1987A
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- Gröningsson, Per (author)
- Stockholms universitet,Institutionen för astronomi,Stockholm University
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- Fransson, Claes (author)
- Stockholms universitet,Institutionen för astronomi,Stockholm University
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- Lundqvist, Peter (author)
- Stockholms universitet,Institutionen för astronomi,Stockholm University
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- Chevalier, R. (author)
- Leibundgut, B. (author)
- Spyromilio, J. (author)
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- (creator_code:org_t)
- 2006-08-31
- 2006
- English.
- In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 456:2, s. 581-589
- Journal article (peer-reviewed)
Abstract
Subject headings
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- High resolution spectra with UVES/VLT of SN 1987A from December 2000 until November 2005 show a number of high ionization lines from gas with velocities of ± 350 km s-1, emerging from the shocked gas formed by the ejecta-ring collision. These include coronal lines from [Fe X], [Fe XI] and [Fe XIV] which have increased by a factor of 20 during the observed period. The evolution of the lines is similar to that of the soft X-rays, indicating that they arise in the same component. The line ratios are consistent with those expected from radiative shocks with velocity 310{-}390 km s-1, corresponding to a shock temperature of (1.6{-}2.5)× 106 K. A fraction of the coronal emission may, however, originate in higher velocity adiabatic shocks.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- supernovae: individual: SN 1987A
- circumstellar matter
- shock waves
- Formation and development of stars
- Stjärnors bildning och utveckling
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- ref (subject category)
- art (subject category)
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- Fransson, Claes
- Lundqvist, Peter
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- Leibundgut, B.
- Spyromilio, J.
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- Royal Institute of Technology
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