Far‐ultraviolet observations of the neutral comae of comet Hale‐Bopp (C/1995 01) near perihelion | Zendy

Brittnacher M. | Zendy; Kang J. | Zendy; Parks G. | Zendy; Elsen R. | Zendy; Germany G. | Zendy; Spann J. | Zendy; Fox N. | Zendy; Puetter R. C. | Zendy; Yahil A. | Zendy

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Far‐ultraviolet observations of the neutral comae of comet Hale‐Bopp (C/1995 01) near perihelion

Author(s) -

Brittnacher M.,

Kang J.,

Parks G.,

Elsen R.,

Germany G.,

Spann J.,

Fox N.,

Puetter R. C.,

Yahil A.

Publication year - 2001

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/2000gl012567

Subject(s) - physics , coma (optics) , comet , astrophysics , ultraviolet , wavelength , production rate , astronomy , oxygen , flux (metallurgy) , optics , chemistry , industrial engineering , organic chemistry , quantum mechanics , engineering

The Ultraviolet Imager on the Polar spacecraft observed the neutral oxygen and carbon comae of Comet Hale‐Bopp (C/1995 01) at far‐ultraviolet wavelengths near perihelion on March 31 and April 2, 1997. The OI (1304) coma was circularly symmetric with a diameter of about 5 million km. The coma was smaller in the longer wavelength (1400–1600 Å and 1600–1800 Å) bands, which is probably due to fluorescence of neutral carbon at 1561 Å and 1657 Å. The production rate for O calculated from the observed OI (1304) flux was (9.8±2.5) × 10 30 . Using this value the estimated production rate for OH was (8.9±2.5) × 10 30 and for H 2 O was (1.0±0.3) × 10 31 .

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