Optical interferometric observations of a transient event of 1986 March 13 in the coma of Comet Halley

Prasad, D. C; Chandrasekhar, T; Desai, J. N; Ashok, N. M; Krishan, V

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dc.contributor.author	Prasad, D. C
dc.contributor.author	Chandrasekhar, T
dc.contributor.author	Desai, J. N
dc.contributor.author	Ashok, N. M
dc.contributor.author	Krishan, V
dc.date.accessioned	2008-09-17T12:20:59Z
dc.date.available	2008-09-17T12:20:59Z
dc.date.issued	1989-03
dc.identifier.citation	Journal of Astrophysics and Astronomy, Vol. 10, No. 1, pp. 1 - 20	en
dc.identifier.issn	0250-6335
dc.identifier.uri	http://hdl.handle.net/2248/3720
dc.description.abstract	During the recent apparition of Comet Halley in 1985-86, a transient ionic event in the form of a blob of H2O(+) emission was recorded in the coma at about 0 h UT on March 13, 1986. Observations were carried out using a special filter for H2O(+) emission at 7000 A/175 A, a 35-cm telescope, a Fabry-Perot interferometer, and an image intensifier camera from Gurushikhar, Mt. Abu. A Fabry-Perot interferogram in H-alpha taken a few minutes later at the same location, reveals strong hydrogen emission (H-alpha) associated with the blob. The velocity field in the blob is structured with relative velocities up to about 35 km/sec. The event is interpreted as arising due to the sector boundary crossing of the interplanetary magnetic field by the comet.	en
dc.language.iso	en	en
dc.publisher	Indian Academy of Sciences	en
dc.relation.uri	http://ads.iucaa.ernet.in/abs/1989JApA...10....1D	en
dc.subject	Cometary atmospheres	en
dc.subject	Fabry-perot interferometers	en
dc.subject	Halley's comet	en
dc.subject	Visible spectrum	en
dc.subject	Emission spectra	en
dc.subject	H alpha line	en
dc.subject	Interplanetary magnetic fields	en
dc.subject	Solar wind	en
dc.subject	Spectrum analysis	en
dc.subject	Water	en
dc.title	Optical interferometric observations of a transient event of 1986 March 13 in the coma of Comet Halley	en
dc.type	Article	en