MASS AND PENETRATION DEPTH OF SHOEMAKER-LEVY-9 FRAGMENTS FROM TIME-RESOLVED PHOTOMETRY

被引:52
作者
BOSLOUGH, MB [1 ]
CRAWFORD, DA [1 ]
ROBINSON, AC [1 ]
TRUCANO, TG [1 ]
机构
[1] SANDIA NATL LABS,DEPT COMPUTAT PHYS RES & DEV 1431,ALBUQUERQUE,NM 87185
关键词
D O I
10.1029/94GL01582
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Computational simulations of the first 100 seconds of interaction of Shoemaker-Levy 9 fragments with the Jovian atmosphere have revealed a potential method for estimating the masses and penetration depths of the individual objects. For sufficiently large fragments, impact-generated fireballs will rise into line-of-sight over the Jovian limb (less than one minute after impact for a 3-km diameter fragment). It is possible that time-resolved radiometric measurements from Earth- and orbital-based observatories may detect two different arrivals for each impact: first the shock wave and, a few seconds later, a debris front (fireball). Measurements of one or both arrival times with time resolutions of better than one second will provide information that would place strong restrictions on the range of values of equivalent explosive yield (from which fragment mass can be extracted) and effective penetration depth. We believe that time-resolved photometry measurements of impact-induced light emission (impact-flash signatures) will provide the best means by which Shoemaker-Levy 9 fragment masses can be determined if they are greater than about 5X10(15) g (corresponding to a 1-km diameter ice sphere).
引用
收藏
页码:1555 / 1558
页数:4
相关论文
共 16 条
  • [1] A MODEL FOR TIME-DEPENDENCE IN SHOCK-INDUCED THERMAL-RADIATION OF LIGHT
    BOSLOUGH, MB
    [J]. JOURNAL OF APPLIED PHYSICS, 1985, 58 (09) : 3394 - 3399
  • [2] CRAWFORD DA, 1994, IN PRESS SHOCK WAVES
  • [3] GLASSTONE S, 1977, EFFECTS NUCLEAR WEAP, P45
  • [4] DYNAMIC RESPONSE OF JUPITER'S ATMOSPHERE TO THE IMPACT OF COMET SHOEMAKER-LEVY 9
    HARRINGTON, J
    LEBEAU, RP
    BACKES, KA
    DOWLING, TE
    [J]. NATURE, 1994, 368 (6471) : 525 - 527
  • [5] ATMOSPHERIC GRAVITY-WAVES FROM THE IMPACT OF COMET SHOEMAKER-LEVY-9 WITH JUPITER
    INGERSOLL, AP
    KANAMORI, H
    DOWLING, TE
    [J]. GEOPHYSICAL RESEARCH LETTERS, 1994, 21 (11) : 1083 - 1086
  • [6] IVANOV BA, 1994, LUNAR PLANET SCI, V25, P597
  • [7] MACLOW MM, 1994, IN PRESS ICARUS
  • [8] MARLEY M, 1994, IN PRESS ASTROPHYS J
  • [9] CTH - A 3-DIMENSIONAL SHOCK-WAVE PHYSICS CODE
    MCGLAUN, JM
    THOMPSON, SL
    ELRICK, MG
    [J]. INTERNATIONAL JOURNAL OF IMPACT ENGINEERING, 1990, 10 (1-4) : 351 - 360
  • [10] MORAN B, 1993, EOS, V74, P389