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Title: | Specke interferometry of SN 1987A and the "Mystery spot" |
Authors: | Nityananda, R. |
Issue Date: | 24-Feb-1988 |
Publisher: | Indian Institute of Astrophysics, Bangalore |
Citation: | Kodaikanal Observatory Bulletin, 1988, Vol.10, p55-58 |
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 15' and a separation of 60 milliarcseconds , in a 1002 wide band including H alpha . Among the possible explanations suggested for this remarkable source a r e (i) A relativistic jet breaking out from a weak spot in the supernova shell (ii) Relativistic ejection along 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. The secondary source has now d is appeared leaving us to decide between these two possibilities |
Description: | Restricted Access. |
URI: | http://hdl.handle.net/2289/2567 |
Alternative Location: | http://adsabs.harvard.edu/cgi-bin/bib_query?1988KodOB..10...55N http://hdl.handle.net/2248/11 |
Copyright: | 1988 Indian Institute of Astrophysics |
Appears in Collections: | Research Papers (A&A) |
Files in This Item:
File | Description | Size | Format | |
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1988 Kodai Obs. Bull. V10 p55.pdf Restricted Access | Restricted Access | 177.88 kB | Adobe PDF | View/Open Request a copy |
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