Gordeladse, Sh.G. და გორდელაძე, შ. (1937) ახალ ვარსკვლავთა ანთების დროს გამოტყორცნილი გარსის შესახებ / On the Estimation of the Mass Ejected During the Outburst of Nova. აბასთუმნის ასტროფიზიკური ობსერვატორიის ბიულეტენი / Bulletin of the Abastumani Astrophysical Observatory (1). С. 55-85.
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რეზიუმე
In the present paper we make an attempt to estimate the mass ejected in the process of outburst. As the object of our study some typical Novae were chosen the data concerning those being more complete and reliable (Table II). The existence of characteristics common to all Novae, viz. the small dispersion of the absolute magnitude during the maximum, a sharply expressed maximum followed by fainter secondary ones, almost constant brightness before and after the outburst, a moderate dispersion of expansion velocities of the nebulous envelopes, identical spectral changes and others enable us to suppose with great probability that forces causing the increase of brightness are similar. We can suppose that among other conditions which secure the relative stability of the envelopes of planetary nebulae one of the most important is the amount of the mass. We can suppose that among other conditions which secure the relative stability of the envelopes of planetary nebulae one of the most important is the amount of the mass. In fact it we start from our results (Table IV) and take into account that the mass of the envelope of planetary nebulae has an approximate va¬lue of 1051, we actually find a considerable difference (of the order of 10' 103) between the masses. If we assume the mechanism of the formation of envelopes around pla¬netary nebulae and Novae to be identical and also that the amount of the envelope's mass is of considerable importance for the period of evolution of those cosmic objects it will be possible to show (19) that the absolute bright¬ness of Nova which supposedly produced the planetary nebula ought to attain 15 m at maximum. Let us also remark that not a single typical Nova of our galaxy did present- an envelope nor did it produce any planetary nebula. Thus, it follows that the planetary nebulae could* have been formed exclusively in the process of outburst of super-Novae if these two cosmic phe¬nomena are at all connected in any way. As we know not a single super-Nova has been registered in our galaxy up to the very present time, except the Nova of 1572 observed by Tyho Brahe, the data conserning which are incomplete and doubtful. The formation of any new planetary nebula has not been registered either and this seems to be natural if we consider them to be the products of the outburst of super-Novae. On the other hand purely statistical considerations suggest that the out¬burst of super-Novae is brought about by certain specific circumstances (or by a combination of them) the existence of which is not necessary for the formation of usual typical Novae. Thus, if we accept, even, that the mechanism of the formation of No¬vae (explosion-like ejection of the mass accompanied by a continuous out¬flow) is identical to that of planetary nebulae we should still discern between the dynamics of these two phenomena. December, 1936
| ობიექტის ტიპი: | სტატია |
|---|---|
| თემატიკა: | Q Science > QB Astronomy |
| ქვეგანყოფილება: | Institutes > Evgeny Kharadze Abastumani National Astrophysical Observatory |
| განმათავსებელი მომხმარებელი: | თამარ ჭაღიაშვილი |
| განთავსების თარიღი: | 18 მაისი 2018 13:05 |
| ბოლო ცვლილება: | 02 ივნისი 2018 18:12 |
| URI: | http://eprints.iliauni.edu.ge/id/eprint/7976 |
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