Deep Impactmission to Tempel 1 favours New Explosive Cosmogony of comets

Abstract

The assumption that short-period (SP) comets are fragments of massive icy envelopes of Ganymede-like bodies saturated by products of ice electrolysis that underwent global explosions provides a plausible explanation of all known manifestations of comets, including the jet character of outflows, the presence of ions in the vicinity of the nucleus, the bursts and splitting of cometary nuclei, etc., with solar radiation initiating burning of the products of electrolysis in the nucleus. As shown persuasively by numerical simulation carried out in hydrodynamic approximation, the shock wave initiated by the Deep Impact (DI) impactor in the cometary ice saturated originally by the electrolysis products 2H 2 + O 2 is capable of activating under certain conditions exothermal reactions (of the type O 2 + H 2 + organics → H 2 O + CO + HCN + other products of incomplete burning of organics including its light and heavy pyrolyzed compounds, soot, etc.), which will slow down shock wave damping (forced detonation) and increase many times the energy release. As a result, the measured energetics of ejections and outflows from the crater have to exceed the DI energetics. Analysis of different clusters of the DI experiment data confirms these conclusions and expectations and thus it favours the planetary origin of comets.

Stardust findings favor not only the planetary origin of comets but the underlying close-binary cosmogony of the Solar System as well

“…The impactor struck apparently the ice that contained, besides the organics, 2H 2 + O 2 as well, so that it initiated in this mix forced detonation with a liberation of energy exceeding E 0 by a few times at least. Forced detonation sets in at its threshold, i.e., at T ≈ 900 K. It turned out that it is this temperature that matches the observed leading edge velocity of the water vapor outflow into vacuum, as well as the onset of transformation of amorphous to crystalline silicates, which were detected in the impact-produced plume (for more details, see Drobyshevski et al, 2007). The density of the Tempel 1 nucleus estimated from the ballistic flight time of the ejecta brought in to surface was found to be somewhat larger than expected (620+470/-330 kg/m 3 ; A' Hearn et al, 2005).…”

“…NEC concepts provided a firm basis for our predictions and explanation of many results gained in the Deep Impact mission to the 9P/Tempel 1 comet (Drobyshevski et al, 2005(Drobyshevski et al, , 2007. In particular, we have succeeded in "saving", in a certain sense, the energy conservation law.…”

“…One could certainly counter that detection of one such particle does not necessarily entail any implications; indeed, its capture could have no connection with the comet whatsoever and could be caused by a random collision in the dust collection region with a grain ejected in disruption of a suitable meteoroid. A more scrupulous IR spectral analysis of the dust of the Tempel 1 comet performed by Lisse et al (2006) reveals, however, that the observed fraction of crystallization of the olivine components would require a temperature from 1100 to 1400 K. This temperature is noticeably higher than needed for crystallization of the pyroxenes, T ≈ 800-900 K, which could be reached in forced detonation of the electrolyzed ices of the comet (Drobyshevski et al, 2005(Drobyshevski et al, , 2007. Therefore, the problem of the presence of high-temperature condensates in cometary ices remains unsolved.…”

Features of a comet nucleus: The case of 103P/Hartley 2

“…We should note two following facts. First, the gravitational approach gives the size of the hole several times greater than the strength one (Drobyshevski et al 2007). Secondly, a consequence of many uncertainties related to the size of these holes is a proliferation of different hole scaling laws which try to determine the hole diameter (Jeffers et al 2001).…”

I.S.Astapovich and a cometary nature of Tunguska meteorite of 1908

“…Отсутствие скальных осколков делает астероидную гипотезу менее вероятной, тогда как бытовавшее некоторое время назад (см. ссылки в [40]) представление о рыхлой структуре кометных ядер, да и сам ледяной состав их, делают кометную гипотезу более притягательной. С другой стороны, как мы увидим ниже (разд.…”