Speckel Interferometry of SN 1987A and the "Mystery Spot"

dc.contributor.author	Nityananda, Rajarama
dc.date.accessioned	2004-11-08T12:02:27Z
dc.date.available	2004-11-08T12:02:27Z
dc.date.issued	1988
dc.identifier.citation	Kodaikanal Observatory Bulletins Series A, Vol 10, pp. 55-58	en
dc.identifier.issn	0374-3632
dc.identifier.uri	http://hdl.handle.net/2248/11
dc.description.abstract	Two groups have independently studied SN1987A by the technique of optical speckle interferometry in the visible region of wavelengths about a month after the explosion. Both detect a secondary source a factor of ten fainter than the primary, at a position angle of 15o and a separation of 60 milliarcseconds, in a 100Å wide band including Hα. Among the possible explanations suggested for this remarkable source are (i) A relativistic jet breaking out from a weak spot in the supernova shell (ii) Relativistic ejection among the axis of rotation during the collapse (iii) Ionisation of a nearby gas cloud by a flash of hard radiation emitted at a very early stage, followed by recombination.
dc.format.extent	118773 bytes
dc.format.mimetype	application/pdf
dc.language.iso	en
dc.publisher	Indian Institute of Astrophysics	en
dc.subject	Speckle Interferometry	en
dc.subject	Supernova 1987A	en
dc.title	Speckel Interferometry of SN 1987A and the "Mystery Spot"	en
dc.type	Article	en