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The Matter Beyond t...
The Matter Beyond the Ring : The Recent Evolution of SN 1987A Observed by the Hubble Space Telescope
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- Larsson, Josefin (author)
- KTH,Albanova VinnExcellence Center for Protein Technology, ProNova,Fysik,Oskar Klein Ctr
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- Fransson, Claes (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm Univ, Dept Astron, AlbaNova, Oskar Klein Ctr, SE-10691 Stockholm, Sweden.
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- Alp, D. (author)
- KTH,Fysik,Albanova VinnExcellence Center for Protein Technology, ProNova,Oskar Klein Ctr
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- Challis, P. (author)
- Harvard Smithsonian Ctr Astrophys, 60 Garden St,MS-19, Cambridge, MA 02138 USA.
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- Chevalier, R. A. (author)
- Univ Virginia, Dept Astron, POB 400325, Charlottesville, VA 22904 USA.
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- France, K. (author)
- Univ Colorado, Lab Atmospher & Space Phys, 392 UCB, Boulder, CO 80309 USA.
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- Kirshner, R. P. (author)
- Harvard Smithsonian Ctr Astrophys, 60 Garden St,MS-19, Cambridge, MA 02138 USA.;Gordon & Betty Moore Fdn, 1661 Page Mill Rd, Palo Alto, CA 94304 USA.
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- Lawrence, S. (author)
- Hofstra Univ, Dept Phys & Astron, Hempstead, NY 11549 USA.
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- Leibundgut, B. (author)
- European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany.
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- Lundqvist, Peter (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm Univ, Dept Astron, AlbaNova, Oskar Klein Ctr, SE-10691 Stockholm, Sweden.
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- Mattila, S. (author)
- Univ Turku, Dept Phys & Astron, Tuorla Observ, FI-20014 Turku, Finland.
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- Migotto, Katia (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm Univ, Dept Astron, AlbaNova, Oskar Klein Ctr, SE-10691 Stockholm, Sweden.
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- Sollerman, Jesper (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm Univ, Dept Astron, AlbaNova, Oskar Klein Ctr, SE-10691 Stockholm, Sweden.
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- Sonneborn, G. (author)
- NASA, Goddard Space Flight Ctr, Observat Cosmol Lab, Code 665, Greenbelt, MD 20771 USA.
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- Spyromilio, J. (author)
- European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany.
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- Suntzeff, N. B. (author)
- Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, Dept Phys, 4242 TAMU, College Stn, TX 77843 USA.
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- Wheeler, J. C. (author)
- Univ Texas, Dept Astron, Austin, TX 78712 USA.
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(creator_code:org_t)
- 2019-12-03
- 2019
- English.
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In: Astrophysical Journal. - : IOP PUBLISHING LTD. - 0004-637X .- 1538-4357. ; 886:2
- Related links:
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https://iopscience.i...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- The nearby SN 1987A offers a spatially resolved view of the evolution of a young supernova (SN) remnant. Here we present recent Hubble Space Telescope imaging observations of SN 1987A, which we use to study the evolution of the ejecta, the circumstellar equatorial ring (ER), and the increasing emission from material outside the ER. We find that the inner ejecta have been brightening at a gradually slower rate and that the western side has been brighter than the eastern side since similar to 7000 days. This is expected given that the X-rays from the ER are most likely powering the ejecta emission. At the same time, the optical emission from the ER continues to fade linearly with time. The ER is expanding at 680 50 km s(-1), which reflects the typical velocity of transmitted shocks in the dense hot spots. A dozen spots and a rim of diffuse H alpha emission have appeared outside the ER since 9500 days. The new spots are more than an order of magnitude fainter than the spots in the ER and also fade faster. We show that the spots and diffuse emission outside the ER may be explained by fast ejecta interacting with high-latitude material that extends from the ER toward the outer rings. Further observations of this emission will make it possible to determine the detailed geometry of the high-latitude material and provide insight into the formation of the rings and the mass-loss history of the progenitor.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- Core-collapse supernovae
- Supernova remnants
- Circumstellar matter
- Shocks
- Ejecta
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Larsson, Josefin
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Fransson, Claes
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Alp, D.
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Challis, P.
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Chevalier, R. A.
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France, K.
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Kirshner, R. P.
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Lawrence, S.
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Leibundgut, B.
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Lundqvist, Peter
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Mattila, S.
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Migotto, Katia
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Sollerman, Jespe ...
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Sonneborn, G.
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Spyromilio, J.
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Suntzeff, N. B.
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Wheeler, J. C.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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Astrophysical Jo ...
- By the university
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Royal Institute of Technology
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Stockholm University