Astronomy and Astrophysics – Astronomy
Scientific paper
May 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.274..256s&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 274, Issue 1, pp. 256-264.
Astronomy and Astrophysics
Astronomy
7
Supernovae: Individual: Sn 1987A, Ism: General, Magellanic Clouds
Scientific paper
The expanding light echoes surrounding SN 1987A have been studied photographically over a period exceeding 3yr, sufficiently long that a view of the three-dimensional nature of the reflecting material can now be derived. We present two different projections of the dust distribution. We find a number of discrete clouds, a linear formation and two prominent sheets of material, one of which is clearly split while the other has significant depth. We find an association with the HII region N157C, but not with the supergiant shell that forms part of the N157C complex, which we show to lie behind the supernova. Although we still prefer to assign the major echoes to the front and rear faces of a single, uncatalogued supergiant shell, we cannot preclude the existence of two foreground supergiant shells, one inside the other and both containing the supernova. We discuss the association of the echoes with absorption features and recommend further observations that can clarify the structure of this region of the LMC.
Allen David A.
Couch Warrick J.
Malin David F.
Spyromilio Jason
Steer C. J.
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