From the Tunguska Space Body to the Evolution
of the Protoplanetary Nebula
O. G. Gladysheva
Ioffe Physical Technical Institute of RAS, St. Petersburg, Russia
Abstract:
A model for the structure of comet nuclei is proposed based on the results
of the investigations of carbonaceous substances from the epicenter of the
Tunguska cosmic body (TCB) explosion. According to this model the comet
nucleus structure is a conglomerate of micron sized ice granules covered
with organic materials that have dust particles as their nuclei.
Such structure could be formed at a stage of continuous temperature
decrease in the protoplanetary nebula. After the water vapour has
condensed onto the dust particles, organic molecules and gases such
as NH3, CO2, H2S, etc. are precipitated on the surfaces of ice-covered
grains. Under the influence of different types of radiation (for example,
cosmic rays) and thermal processing the polymerization of the initial
components takes place and as a result carbon-chain and more complex
molecules are formed*.
*Editorial note: This paper suggests several new ideas about the solar nebula and the formation and composition of comet nuclei based on investigations of the Tunguska event. However, many of these ideas are hypotheses that still need experimental verification or theoretical modeling based on well-established principles of physics and chemistry.
Key words:
Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), Tunguska cosmic body (TCB), carbonaceous substances, TCB explosion epicenter, comet nucleus structure, protoplanetary nebula, organic molecules and gases, NH3, CO2, H2S, radiation,
cosmic rays, thermal processing, polymerization of the initial components, carbon-chain molecules.