Near infrared coronal line emission in Nova Herculis 1991 |
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| Authors: | T Chandrasekhar N M Ashok Sam Ragland |
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| Institution: | (1) Physical Research Laboratory, Navrangpura, 380009 Ahmedabad |
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| Abstract: | Near infrared coronal line emission at 1.98 ± 0.02Μm due to Si VI] detected in the spectrum of Nova Herculis 1991 about 17
days after optical maximum is reported. The early appearance of coronal emission is yet another unusual feature of this fast
nova in which early onset of dust formation processes and X-ray detection five days after outburst have already been reported.
The coronal line observations reported here are consistent with X-ray detection and support a hot shocked circumstellar envelope
at the periphery of the dust formation zone in the nova. |
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| Keywords: | Nova Her 91 infrared spectrophotometry coronal line emission shock heating circumstellar dust |
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