SELF

56

O.N. Karavashkina and S.B. Karavashkin

2.1. Choosing the model of protostar formation

How and of what the star is formed? We can see in the photo of Virgo cluster, how its galaxy A jets into the space a giant cluster of plasma (see Fig. 2.1). This enables us to suppose after Ambartsumian [3] that we see the explosive burn of the star or even of star association. As we mentioned in the Chapter 1, basing on many-year observation of such objects, Ambartsumian has concluded that just bursts are responsible for the origin, evolution and decay of celestial bodies.

Fig. 2.1. Radio galaxy Virgo A with the jet ejected from its core [3, p. 350].

In another photograph (see Fig. 2.2) we see the binary core of radio galaxy Swan A. Having recalled the described in Chapter 1 Macloren's figures and J.G. Darvin's hypothesis of the Moon separated from Earth when the liquid body exceeded some critical for it speed of rotation, we can treat this picture as an evidence of such transformation of rotating element due to which one core divides into two. However let us keep in mind, the photo can register only an instant which we catch from the process, in projection, and even having observed these phenomena several dozen years, we have not enough evidence for such claim.

Fig. 2.2. The binary core of radio galaxy Swan A [3, p. 348].

On the other hand we know, the pressure front compacts rotating gas-dust nebulae in the Galaxy branches, and their spread along the radius leads to inequal densification; this force tends to divide the cloud, and in the limit we can suppose local objects, differently compressing and compacting into a star. And we do observe in the Orion nebula such "in-turn" star origin.

Fig. 2.3. One of the nearest sites of active star formation - Orion nebula. The image has been obtained by way of special contrasting that reveals the fibred structure [4, p. 202, photo XXX].

There exist much more powerful stimuli. In explosion of already existing stars, they propagate shock waves that very effectively compact the interstellar gas and heat it to about 10⁶ K [1, p. 53]; here we also can expect appropriate conditions for star formation. And really, the fibred structure clearly seen in Fig. 2.3 reveals that the cluster has been formed by the compressing shock wave - just in the region of today star formation. However, though the shock wave can initiate this process, if the conditions for it do not exist, it rather will not be supported and the compaction will not form the star. This means, the star formation conditions have to exist already in this region.