Outgassing Behavior and Composition of Comet C/1999 S4 (LINEAR) During Its Disruption-Reference-Cited by-同舟云学术

Outgassing Behavior and Composition of Comet C/1999 S4 (LINEAR) During Its Disruption

Published:2001-05-18 Issue:5520 Volume:292 Page:1339-1343
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Bockelée-Morvan Dominique¹,Biver Nicolas¹,Moreno Raphaël²,Colom Pierre¹,Crovisier Jacques¹,Gérard Éric¹,Henry Florence¹,Lis Dariusz C.³,Matthews Henry⁴,Weaver H. A.⁵,Womack Maria⁶,Festou Michel C.⁷

Affiliation:

1. Observatoire de Paris-Meudon, F-92195, Meudon, France.

2. Institut de Radioastronomie Millimétrique, 300 rue de la Piscine, Domaine Universitaire, F-38406, St. Martin d'Hères Cedex, France.

3. Department of Physics, California Institute of Technology, MS 320-47, Pasadena, CA 91125, USA.

4. Joint Astronomy Centre, 660 North A'ohoku Place, Hilo, HI 96720, USA.

5. Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218–2686, USA.

6. St. Cloud State University, 720 Fourth Avenue S, MS 324, St. Cloud, MN 56301–4498, USA.

7. Observatoire Midi-Pyrénées, 14 avenue Edouard Belin, F-31400, Toulouse, France.

Abstract

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 (≤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 (∼100- to 300-meter radius) that had been losing debris for weeks. The HNC, H 2 CO, H 2 S, and CS abundances relative to H 2 O measured during breakup are consistent with those obtained in other comets. However, a deficiency in CH 3 OH and CO is observed.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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