期刊
ASTRONOMY & ASTROPHYSICS
卷 414, 期 2, 页码 749-755出版社
E D P SCIENCES
DOI: 10.1051/0004-6361:20031610
关键词
comets : general; comets : individual : 67P/Churyumov-Gerasimenko
From longslit spectra obtained during the 1996 perihelion passage of Comet 67P/Churyumov-Gerasimenko, a CN production rate of (1.35 +/- 0.35) x 10(25) molecules s(-1) was determined and an upper limit for the C-3 production rate of 1 x 10(25) molecules s(-1) was derived. The dust color and dust activity were determined from the continuum light in the spectra. A neutral dust color was determined between 4070 Angstrom and 4600 Angstrom. The CN production rate and the Afrho parameter, determined to (428.2 +/- 59.8) cm, were similar to the values of the 1982 perihelion passage, indicating that the comet's activity did not change significantly in recent orbital passages. A first crude estimate of the dust production rate indicates a high dust to gas mass ratio. R-filter images taken in March 2003 were used to study the dust coma morphology. Two jet structures were seen in the coma; these structures show no variations within the observing period from March 7 to May 30, 2003. The orientation of these stationary structures suggests an inclination of the rotation axis of the nucleus of approximately 40degrees with respect to the orbital plane.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据