Outgassing behavior and composition of comet C/1999 S4 (LINEAR) during its disruption

被引：69

作者：

Bockelée-Morvan, D

Biver, N

Moreno, R

Colom, P

Crovisier, J

Gérard, É

Henry, F

Lis, DC

Matthews, H

Weaver, HA

Womack, M

Festou, MC

机构：

[1] Observ Paris, F-92195 Meudon, France

[2] Inst Radioastron Millimetr, F-38406 St Martin Dheres, France

[3] CALTECH, Dept Phys, Pasadena, CA 91125 USA

[4] Joint Astron Ctr, Hilo, HI 96720 USA

[5] Johns Hopkins Univ, Baltimore, MD 21218 USA

[6] St Cloud State Univ, St Cloud, MN 56301 USA

[7] Observ Midi Pyrenees, F-31400 Toulouse, France

来源：

SCIENCE | 2001年 / 292卷 / 5520期

关键词：

D O I：

10.1126/science.1058512

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The gas activity of comet C/1999 S4 (LINEAR) was monitored at radio wavelengths during its disruption. A runaway fragmentation of the nucleus may have begun around 18 July 2000 and proceeded until 23 July. The mass in small icy debris (less than or equal to 30-centimeter radius) was comparable to the mass in the Large fragments seen in optical images. The mass budget after breakup suggests a small nucleus (similar to 100- to 300-meter radius) that had been losing debris for weeks. The HNC, H2CO, H2S, and CS abundances relative to H2O measured during breakup are consistent with those obtained in other comets. However, a deficiency in CH3OH and CO is observed.

引用

页码：1339 / 1343

页数：5

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