Comet C/1996 B2 Hyakutake: observations, interpretation and modelling of the dynamics of fragments of cometary nuclei

被引:16
作者
Desvoivres, E
Klinger, J
Levasseur-Regourd, AC
Lecacheux, J
Jorda, L
Enzian, A
Colas, F
Frappa, E
Laques, P
机构
[1] Univ Grenoble 1, CNRS, LGGE, F-38402 St Martin Dheres, France
[2] Univ Paris 06, Serv Aeron, CNRS, F-91371 Verrieres Le Buisson, France
[3] Observ Meudon, F-92195 Meudon, France
[4] Max Planck Inst Aeron, D-37189 Katlenburg Lindau, Germany
[5] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA
[6] Bur Longitudes, F-75013 Paris, France
[7] Planetarium St Etienne, Espace Fauriel, F-42100 St Etienne, France
[8] Observ Pic Du Midi & Toulouse, F-65201 Bagneres De Bigorre, France
关键词
methods : numerical; techniques : image processing; celestial mechanics; stellar dynamics; comets : general; comets : individual : C/1996 B2 Hyakutake;
D O I
10.1046/j.1365-8711.1999.02294.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Comet C/1996 B2 Hyakutake was extensively observed at the Pic du Midi observatory during late March of 1996, Bright condensations were observed in the near-nucleus coma. We have performed a detailed data analysis in order to derive the position of these features with respect to the nucleus. We make the hypothesis that they are induced by fragments of the nucleus. Despite the frequency of fragmentation of cometary nuclei, the dynamics of the fragments is not yet well understood. We propose a general approach in order to study the motion of the fragments in the orbital plane of the comet. An estimate of the non-gravitational forces is used to describe the motion of the fragment and of the nucleus with respect to their centre of mass. Then the equations of the theory of perturbed Keplerian motion are solved in order to study the motion of the centre of mass, This approach is applied to Comet C/1996 B2 Hyakutake, The results are in good agreement with the observations, An excellent fit is obtained for a fragment size of 20 m, assuming a density of 300 kg m(-3).
引用
收藏
页码:826 / 834
页数:9
相关论文
共 28 条
[1]  
BONNHARDT H, 1995, 6274 IAU
[2]   ON THE RATE AT WHICH COMETS SPLIT [J].
CHEN, J ;
JEWITT, D .
ICARUS, 1994, 108 (02) :265-271
[3]  
Danjon A., 1959, ASTRONOMIE GEN
[4]  
Delsemme A. H., 1982, COMETS, P85
[5]   PHYSICO-CHEMICAL PHENOMENA IN COMETS .3. CONTINUUM OF COMET BURNHAM (1960 2) [J].
DELSEMME, AH ;
MILLER, DC .
PLANETARY AND SPACE SCIENCE, 1971, 19 (10) :1229-&
[6]  
Enzian A, 1997, ASTRON ASTROPHYS, V319, P995
[7]  
FANALE FP, 1984, ICARUS, V60, P476, DOI 10.1016/0019-1035(84)90157-X
[8]  
GEAR CW, 1971, NUMERICAL INITIAL VA, P158
[9]   Radar detection of the nucleus and Coma of Comet Hyakutake (C/1996 B2) [J].
Harmon, JK ;
Ostro, SJ ;
Benner, LAM ;
Rosema, KD ;
Jurgens, RF ;
Winkler, R ;
Yeomans, DK ;
Choate, D ;
Cormier, R ;
Giorgini, JD ;
Mitchell, DL ;
Chodas, PW ;
Rose, R ;
Kelley, D ;
Slade, MA ;
Thomas, ML .
SCIENCE, 1997, 278 (5345) :1921-1924
[10]   CONDENSATION AND EVAPORATION OF H2O ON ICE SURFACES [J].
HAYNES, DR ;
TRO, NJ ;
GEORGE, SM .
JOURNAL OF PHYSICAL CHEMISTRY, 1992, 96 (21) :8502-8509