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 |